JP4354132B2 - PARTICLE SIZE DISTRIBUTION MEASURING DEVICE, SAMPLING METHOD AND SAMPLING SHEET USED FOR PARTICLE SIZE DISTRIBUTION MEASURING DEVICE - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a particle size distribution measuring device and a sampling method and a sampling sheet used in the particle size distribution measuring device.
[0002]
[Prior art]
Particle measurement technology is indispensable for determining and evaluating the performance of powders in a wide range of fields such as medicine, food, ceramics, cosmetics, paints, and pigments, and its importance is increasing day by day. Yes. One of the devices for measuring the particle size distribution of such a granular material is a laser beam diffraction / scattering particle size distribution measuring device.
[0003]
And as the laser beam diffraction / scattering type particle size distribution measuring device, a circulating means for circulating the sample in a dispersed state in a dispersion medium, a flow type cell configured to pass the circulating sample, and this There is an apparatus used for flow-type measurement including an irradiation unit that irradiates a cell with light and a detection unit that detects secondary light generated by irradiating the sample with light from the irradiation unit.
[0004]
[Problems to be solved by the invention]
However, in the particle size distribution measuring apparatus used for the flow type measurement having the above configuration, when the sample includes particles that are difficult to circulate such as particles having a large specific gravity, only particles having a small specific gravity are measured, and the accurate particle size is measured. There was a problem that the distribution could not be obtained.
[0005]
Further, as the laser beam diffraction / scattering particle size distribution measuring apparatus, a batch type cell that accommodates a sample in a dispersed state in a dispersion medium, an irradiation unit that irradiates light to the cell, and the irradiation unit Is used for batch-type measurement with a detection means for detecting secondary light generated by irradiating the sample with light from the sample, but this particle size distribution measuring apparatus is also used for the flow-type measurement. Similar to the particle size distribution measuring device, when the sample contains particles that are likely to sink in the dispersion medium, such as particles with a large specific gravity, only particles with a small specific gravity are measured, and an accurate particle size distribution cannot be obtained. was there.
[0006]
Furthermore, as another laser light diffraction / scattering particle size distribution measuring device, a paste type cell in which a sample mixed with a high-viscosity medium is sandwiched between two plates, and an irradiation unit for irradiating the cell with light And a paste type measurement device having a detection means for detecting secondary light generated by irradiating the sample with light from the irradiation unit. In this type of particle size distribution measuring apparatus, The preparation of the sample is very troublesome, and the medium and the sample must be mixed at an optimum ratio and sandwiched between two plates, and such work requires a skillful technique. there were.
[0007]
As another laser beam diffraction / scattering type particle size distribution measuring device, a sample in powder form is put into a cup, the sample is sucked in by a suction machine while vibrating the cup, and the sample passes through the cell. However, this type of particle size distribution measuring apparatus not only requires a large amount of sample but also requires a large-scale apparatus such as the suction machine.
[0008]
The present invention has been made in consideration of the above-described problems, and its purpose is to accurately measure a sample containing particles having a large specific gravity and to be able to measure the sample. The particle size distribution measuring device and the particle size can be prepared easily and in a short time, and do not require a large-scale device for the preparation. To provide a sampling method and a sampling sheet used in a distribution measuring apparatus.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a particle size distribution measuring apparatus of the present invention comprises a cell comprising a film body having optical transparency and an adhesive surface portion for adhering a sample, and a holder for holding the film body. A particle size distribution measuring apparatus comprising: an irradiation unit that irradiates light to the cell; and a detection unit that detects secondary light generated by irradiating the sample with light from the irradiation unit. The film body is held in a holder in a state where a plurality of the film bodies are bonded together (Claim 1).
[0010]
Further, the sampling method used in the particle size distribution measuring apparatus of the present invention comprises a cell comprising a film body having optical transparency and an adhesive surface portion for adhering a sample, and a holder for holding the film body, A sampling method used in a particle size distribution measuring apparatus comprising: an irradiation unit that irradiates light to a cell; and a detection unit that detects secondary light generated by irradiating the sample with light from the irradiation unit. Then, a plurality of the film bodies are bonded together and held in a holder, and a used film body is peeled off for each measurement, and a sample is newly attached to the film body used for measurement (Claim 2). .
[0011]
Further, the sampling sheet used in the particle size distribution measuring apparatus of the present invention has a light transmitting property and a cell comprising an adhesive surface portion for attaching a sample and a holder for holding the film body, A sampling sheet used in a particle size distribution measuring apparatus comprising an irradiating unit for irradiating light to a cell and a detecting means for detecting secondary light generated by irradiating the sample with light from the irradiating unit. Then, a plurality of the film bodies are bonded together and used while being held in the holder, and the used film body is peeled off for each measurement, and the sample is attached to the newly exposed film body. (Claim 3).
[0012]
In the present invention having the above-described configuration, it is possible to accurately measure a sample containing particles having a large specific gravity, and it is possible to easily and quickly prepare for making the sample ready for measurement. In addition, it is possible to provide a particle size distribution measuring device capable of performing measurement with only a small amount of sample, a sampling method used for the particle size distribution measuring device, and a sampling sheet without requiring a large-scale device for the preparation. It becomes.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram schematically showing the configuration of a particle size distribution measuring apparatus D according to an embodiment of the present invention, and FIGS. 2A and 2B are perspective views schematically showing the configuration of a cell 3. FIG.
The particle size distribution measuring apparatus D is used for so-called dry measurement, that is, particle size distribution measurement performed in a dry and natural state of sample particles that are powder particles.
[0014]
The particle size distribution measuring device D has a light transmission and a cell (hereinafter referred to as a film body 1) having a film body 1 having an adhesive surface portion 1a for attaching the sample S and a holder 2 for holding the film body 1. Cell 3), irradiation unit 4 that irradiates light to the cell 3, and secondary light (diffracted light and / or scattered light) generated by irradiating the sample S with light from the irradiation unit 4 ) Is detected.
[0015]
The particle size distribution measuring apparatus D irradiates the sample S in the cell 3 with laser light, detects the laser light diffracted and / or scattered by the sample S by the detection means 5, and obtains the diffraction obtained thereby. And / or a laser diffraction / scattering particle size distribution measuring apparatus for processing the intensity distribution of scattered light based on the Franhofer diffraction or Mie scattering theory to obtain the particle size distribution of the sample S.
[0016]
The film body 1 has a thin film shape, a film shape, or a sheet shape, and the adhesive surface portion 1a is formed at the center of the front surface thereof. In addition, the range in which the said adhesion surface part 1a is formed is not restricted to the front center part of the film body 1. FIG.
[0017]
The pressure-sensitive adhesive surface portion 1a is formed by, for example, applying or spraying a light-transmitting adhesive or the like on the film body 1 for attaching the particulate sample S to the film body 1.
[0018]
The holder 2 is made of a light transmissive material and has a substantially rectangular or square shape in plan view. Further, the holder 2 has a thin portion 2a to which the film body 1 is fixed, and a thick portion 2b provided continuously over either the lower side or both the left and right sides of the thin portion 2a. Note that the entire holder 2 may not be formed of a light-transmitting material. For example, only the thin portion 2a may be formed of a light-transmitting material.
[0019]
A plurality of (several to several tens, for example, about 10) film bodies 1, 1... Are bonded together to form a sampling sheet A. The sampling sheet A is attached to the holder 2. Used in a held state. That is, each film body 1 is in a state in which the other film body 1 is detachably attached to the front side via the adhesive surface portion 1a formed on the front surface, and the film body 1 on the rearmost side is, for example, It is fixed to the thin portion 2a of the holder 2 through an adhesive 2c having light permeability. Each film 1 is provided with a peeling margin 1b where the adhesive surface portion 1a is not formed at at least one of its edges (corners or edges), and the film 1 is pulled and pulled. Thus, the film body 1 can be easily peeled off from another film body 1.
[0020]
In addition, you may make it provide the said peeling allowance 1b in the state protruded outside from the edge of the film body 1. FIG.
[0021]
The irradiation unit 4 includes a laser light source 6 that emits laser light in a horizontal direction, a condensing lens 7 that converges divergent laser light emitted from the laser light source 6, and a laser that is converged through the condensing lens 7. It has a mirror 8 that bends light (hereinafter referred to as a condensed laser beam) 90 degrees and irradiates the cell 1, and a laser optical axis adjustment mechanism 9 that holds the mirror 8 and is automatically controlled.
[0022]
The detection means 5 includes a photodetector 10 (ring detector) and a wide-angle scattered light detection group 11.
[0023]
The photodetector 10 is provided at a position where the focused laser beam that has passed through the cell 3 is focused, and receives light in a ring shape or a semi-ring shape with different radii around the optical axis of the focused lens light. A plurality of photosensors (not shown) having a surface are arranged concentrically, and are diffracted / scattered at a relatively small angle out of the condensed laser light diffracted and / or scattered by the sample S in the cell 3. Light is received at each scattering angle and the light intensity is measured.
[0024]
Each photosensor constituting the photodetector 10 is connected to a preamplifier 12 that amplifies its output.
[0025]
The wide-angle scattered light detection group 11 is provided in the vicinity of the cell 3, and is diffracted and / or scattered at a relatively large angle out of the condensed laser light diffracted and / or scattered by the sample S in the cell 3. The detected light is individually detected for each scattering angle.
[0026]
The wide-angle scattered light detection group 11 includes a plurality of photosensors 13 to 18 provided at different angles from the photodetector 10, and has a predetermined angle by the sample S in the cell 1 according to each arrangement angle. Detects scattered light. That is, the photosensors 13 to 16 detect forward scattered light, the photosensor 17 detects side scattered light, and the photosensor 18 detects backscattered light.
[0027]
A preamplifier 19 for amplifying the output of each photosensor 13 to 18 is connected to each of the photosensors 13 to 18.
[0028]
In addition, two light shielding plates 20 and 21 that are parallel to each other are erected on the front side (light incident side) of the wide-angle scattered light detection group 11 (photosensors 13 to 18). In the shielding plates 20 and 21, a plurality of openings, for example, slits 22 and 23 for allowing only the scattered light having a specific scattering angle to pass through the photosensors 13 to 18 are opened by a technique such as etching. .
[0029]
Note that, for example, the slits 22 and 23 corresponding to one photosensor 13 that detects forward scattered light are not necessarily the same shape and size, and the scattered light having a predetermined scattering angle among the forward scattered light from the cell 3. The mutual positions are set so that only the light enters the photosensor 13. The same applies to the slits 22 and 23 corresponding to the other photosensors 14 to 18.
[0030]
The preamplifiers 12 and 19 are connected to a multiplexer 24 that sequentially captures the outputs from the preamplifiers 12 and 19 and sequentially sends them to the AD converter 25. The AD converter 25 receives the output of the AD converter 25. A computer 26 as an arithmetic processing unit to be input is connected.
[0031]
The computer 26 processes the outputs (digital data relating to the light intensity) of the photodetector 10 and the photosensors 13 to 18 converted into digital signals based on Fraunhofer diffraction theory and Mie scattering theory, and the particle diameter in the particle group Stores a program for obtaining the distribution. The computer 26 is connected to a color display 27 for displaying calculation results and the like.
[0032]
In the particle size distribution measuring apparatus D configured as described above, the condensed laser light applied to the sample S in the cell 3 is diffracted and / or scattered by the sample S in the cell 3, and the diffracted light and / or Alternatively, among the scattered light, light having a relatively small scattering angle is imaged on the photodetector 10.
[0033]
At this time, in the photodetector 10, the outer peripheral photosensor receives light with a large scattering angle, and the inner peripheral photosensor receives light with a small scattering angle. Therefore, the light intensity detected by the outer peripheral photosensor reflects the amount of sample particles having a smaller particle diameter, and the light intensity detected by the inner peripheral photosensor represents the amount of sample particles having a larger particle diameter. It will be reflected. The light intensity detected by each of these photosensors is converted into an analog electric signal, and further input to the multiplexer 24 via the preamplifier 12.
[0034]
On the other hand, among the condensed laser light diffracted and / or scattered by the sample particles, the light having a relatively large scattering angle is limited by the slits 22 and 23 formed in the light shielding plates 20 and 21 respectively, and the specific scattered light. Only angle scattered light is incident on the photosensors 13 to 18 respectively, and the light intensity distribution is measured.
[0035]
At this time, scattered light from sample particles having a large particle diameter is detected in the order of the forward scattered light photosensors 13 to 16, the side scattered light photosensor 17, and the backscattered light photosensor 19. The light intensity detected by each of the photosensors 13 to 18 is converted into an analog electric signal, and further input to the multiplexer 24 via the preamplifier 19.
[0036]
In the multiplexer 24, measurement data from the photodetector 10 and the photosensors 13 to 18, that is, analog electric signals are sequentially taken in a predetermined order, converted into a serial signal, and sequentially converted by the AD converter 25. The light intensity data for each scattering angle converted into a signal and further input to the computer 26 and obtained by the photodetector 10 and the photosensors 13 to 18 are processed based on Fraunhofer diffraction theory and Mie scattering theory. The processing result is displayed on the color display 27.
[0037]
As described above, in the particle size distribution measuring apparatus D, the light intensity distribution of the scattered light with respect to the large particle size range is measured by the photodetector 10, and the wide angle with respect to the small particle size range is measured. Since the light intensity distribution of the scattered light is measured by the photosensors 13 to 18 and the outputs of the photodetector 10 and the photosensors 13 to 18 are processed by the computer 26, the particle size distribution in the particle group is determined. It can be obtained all at once over a wide range from a relatively large particle size to a very small particle size.
[0038]
FIG. 3 is a perspective view schematically showing the configuration of the cell holder 30.
The particle size distribution measuring device D includes a holding unit 28 that holds the cell 3 and a plane that uses the cell 3 as the holding unit 28 and the optical axis of light emitted from the irradiation unit 4 as a normal line. A cell holder 30 having a moving mechanism 29 for moving is provided. The cell holder 30 is held upright on the upper surface of the optical bench base 31 (see FIG. 1).
[0039]
The holding portion 28 has a U-shaped cross section and an L shape in front view, and has a placement portion 32 on which the cell 3 is placed and three abutting on the cell 2 from one side thereof. Abutting bodies 33, 33, 33 are provided.
[0040]
The mounting portion 32 is provided in parallel with each other, and each side wall portion 32a, 32a having a substantially L-shape in front view, and a gap formed between the two side wall portions 32a, 32a. Part 32b.
[0041]
The contact body 33 has a male screw portion (not shown) that is screwed into a female screw hole 32 c formed in one side wall portion 32 a of the mounting portion 32, and a handle portion 33 a of the contact body 33. , The contact body 33 can be moved in a direction approaching the other side wall portion 32a, and the handle portion 33a is rotated in the other direction to move the contact body 33 to the other side wall portion 32a. It can be moved in a direction away from the side wall 32a.
[0042]
The three contact bodies 33 are all provided for one side wall portion 32a, and are disposed, for example, at both ends and the center portion of the one side wall portion 32a.
[0043]
In order to fix the cell 3 to the holding portion 28 having the above-described configuration, first, the cell 3 is placed on the placement portion 32, and in this state, the three abutments against the thick portion 2b of the cell 3 are placed. It is only necessary to move the contact bodies 33, 33, 33 so as to contact each other, whereby the cell 3 is sandwiched between the three contact bodies 33, 33, 33 and the other side wall portion 32a in the mounting portion 32. It will be held in the state.
[0044]
The moving mechanism 29 moves the cell 3 in one direction (for example, the vertical direction or the vertical direction, hereinafter referred to as the X direction) on a plane whose normal is the optical axis of the light emitted from the irradiation unit 4. The first mechanism 34 for causing the cell 3 to move in the other direction perpendicular to the X direction on the plane normal to the optical axis of the light emitted from the irradiation unit 4 (for example, And a second mechanism 35 for moving in the width direction or horizontal direction (hereinafter referred to as Y direction).
[0045]
The first mechanism 34 protrudes from the holding portion 28 and has a protruding portion 36 having a female screw hole 36a and a through hole 36b provided in the X direction, and a male screw body 37 screwed into the female screw hole 36a. A guide body 38 that is inserted through the through hole 36b, and a biasing means (for example, a spring) 39 that is held on the outer periphery of the guide body 38 and biases the protruding portion 36 in the length direction of the guide body 38; A driving means (for example, a stepping motor) 40 for rotating the male screw body 37 about its axis is connected to both ends of the guide body 38, and the male screw body 37 can be rotated about its axis. And a main body 41 to be held. The driving means 40 is also fixed to the main body 41.
[0046]
The second mechanism 35 protrudes from the main body 41 of the first mechanism 34 and is screwed into the female screw hole 42a and a protruding portion 42 having a female screw hole 42a and a through hole 42b provided in the Y direction. A male screw body 43, a guide body 44 that is inserted through the through hole 42b, and a biasing means that is held on the outer periphery of the guide body 44 and biases the protruding portion 42 in the length direction of the guide body 44 (for example, A spring) 45, a driving means (for example, a stepping motor) 46 for rotating the male screw body 43 about its axis, and both ends of the guide body 44 are connected, and the male screw body 43 is connected to its axis. It consists of a main body 47 that is rotatably held around and also serves as a pedestal for the cell holder 30. The drive means 46 is also fixed to the main body 47.
[0047]
In the moving mechanism 29 having the above-described configuration, the male screw body 37 is rotated around its axis by the driving means 40, whereby the holding part 28 having the projecting portion 36 is moved in the axial direction of the male screw body 37, that is, in the X direction. Can be moved to. At this time, the projecting portion 36 is guided by the guide body 38 and is urged by the urging means 39 so that backlash does not occur. It will move smoothly in the X direction.
[0048]
Further, by rotating the male screw body 43 around its axis by the driving means 46, the first mechanism 34 having the protruding portion 42, the holding part 28 and the cell 3 are moved in the axial direction of the male screw body 43, that is, the Y direction. Can be moved to. At this time, the projecting portion 42 is guided by the guide body 44 and is urged by the urging means 45 so that backlash does not occur. It will move smoothly in the Y direction.
[0049]
In the cell holder 30 having the above-described configuration, the cell 3 can be held without sandwiching either the left or right side portion and the upper side portion. Irradiation allows measurement.
[0050]
In the particle size distribution measuring apparatus D having the cell holder 30 having the above-described configuration, the cell 3 starts to be moved simultaneously with the start of measurement, and is not biased over the entire measurable region of the cell 3 until the end of the measurement. The cell 3 is continuously moved so as to irradiate the focused laser beam.
[0051]
Here, as the method of moving the cell 3, for example, the cell 3 may be moved so that the focused laser beam is irradiated in a zigzag manner, or the focused laser beam is substantially swirled with respect to the cell 3. You may move so that it may irradiate.
[0052]
Then, the value of the particle size distribution may be obtained by averaging the data accumulated by irradiating the cell 3 with the focused laser beam as described above.
[0053]
If measurement is performed using the cell holder 30 having the above-described configuration, the measurement can be performed by irradiating the wide area of the cell 3 with the focused laser beam, and the amount of measurement data to be obtained increases. The accuracy of the particle size distribution obtained by averaging the data is increased, and the reproducibility of the measurement can be improved.
[0054]
Note that the cell 3 may be moved intermittently without continuing to move from the start of measurement to the end of measurement, and measurement may not be performed while the cell 3 is moving, and measurement may be performed only while the cell 3 is stopped. .
[0055]
Further, the movement of the cell 3 may be automatically performed using the driving means 40 and 46, but may be manually performed.
[0056]
Further, instead of the configuration in which the cell 3 is moved in the X direction and the Y direction, for example, the cell 3 may be rotated around an axis parallel to the optical axis of the light emitted from the irradiation unit 4. Alternatively, measurement may be performed without moving the cell 3.
[0057]
Next, a sampling method in the particle size distribution measuring apparatus D having the cell 3 will be described.
First, the film bodies 1, 1..., That is, the sampling sheet A in a state where a plurality of sheets are bonded are held in the cell 3, and the cell 3 is set in the holding portion 28 of the cell holder 30. And the focused laser beam is irradiated from the said irradiation part 4 with respect to the cell 3 of the state which has not adhered the sample S to the said film body 1, and a blank value is measured. Then, as shown to FIG. 4 (A), the sample S is sprinkled on the adhesion surface part 1a of the film body 1 in the foremost side, and it measures. The particle size distribution of the sample S is obtained based on the measured value and the blank value thus obtained.
[0058]
When the measurement value and the blank value are measured, the cell 3 is moved by appropriately moving the cell 3 on the plane having the optical axis of the light from the irradiation unit 4 as a slope by the cell holder 30. The effect produced by the measurement is obtained.
[0059]
When the measurement is completed once, as shown in FIG. 4 (B), the used film body 1 at the most front side is peeled off, and as shown in FIG. 4 (C), a new film body 1 is put on the front side. Expose. And after measuring a blank value, the sample S is made to adhere to the adhesion surface part 1a of the film body 1 which is the most front side by sprinkling, etc., it measures, The measured value and blank value which were calculated | required in this way and Based on the above, the procedure of obtaining the particle size distribution of the sample S is repeated.
[0060]
As described above, in the particle size distribution measuring apparatus D of the present invention and the sampling method used in this apparatus D, the sampling sheet A is held in the cell 3, and the used film body 1 is peeled off for each measurement, The sample S is newly attached to the film body 1 used for the measurement, and the adhesive surface portion 1a of the film body 1 is joined to such an extent that the film bodies 1 and 1 can be easily separated from each other. And the role which makes the sample S adhere to the film body 1 is fulfilled.
[0061]
According to the particle size distribution measuring apparatus D having the above configuration and the sampling method and sampling sheet A used in the apparatus D, the sample S is measured in a state of being attached to the adhesive surface portion 1a of the film body 1, Even when the sample S includes particles having a large specific gravity, the measurement can be performed accurately, and the measurement can be performed using only a small amount of the sample S.
[0062]
Moreover, as preparation for making the sample S into a measurable state, the used film body 1 is peeled off, the sample S is sprinkled on the newly exposed film body 1 and attached, and the sampling sheet A is attached. Since it is only necessary to hold the holder 2 in the holder 2, the preparation can be performed in a very simple and short time as compared with the case where the sample S is dispersed in a dispersion medium or mixed with the medium. There is no need for extensive equipment for preparation.
[0063]
Further, since the measurement can be performed without using the dispersion medium or the medium, it is not necessary to process the waste liquid after the measurement. It is only necessary to process the sample S and the film body 1 and clean up. Can be done easily. In particular, when it is not necessary to collect the sample S, the film body 1 can be made disposable so that cleaning up after measurement can be performed very easily.
[0064]
If a plurality of types of samples S are attached to the adhesive surface portion 1a of a single film body 1 while being separated from each other, the cell 3 holding the film body 1 is appropriately moved by the cell holder 30 at the time of measurement. It is possible to measure a plurality of types of samples S with the same single film body 1 and further increase the efficiency of the measurement. In this case, you may make it form the said adhesive surface part 1a divided into the several area | region of the film body 1 of 1 sheet.
[0065]
In addition, the work of attaching the sample S to the film body 1 may be performed manually by an operator or may be performed mechanically and automatically, and the work may be performed by sampling. The sheet A may be held in the holder 2 or may be removed from the holder 2.
[0066]
Further, if a description portion (not shown) in which a number, a symbol, or the like is provided is provided on each of the film bodies 1, 1. Thus, the film bodies 1, 1... Can be easily distinguished, and troubles relating to the handling of the sample S can be prevented / reduced. In addition, what is necessary is just to provide the said description part in the edge part of each film body 1, the said peeling allowance 1b, etc., for example.
[0067]
Moreover, before peeling off the used film body 1 and making the sample S adhere to the newly exposed film body 1, the adhesive which forms the said adhesive surface part 1a is apply | coated, and the adhesive force of the adhesive surface part 1a is strengthened. Alternatively, the adhesive surface portion 1a may be widened.
[0068]
【The invention's effect】
According to the present invention having the above-described configuration, it is possible to accurately measure a sample containing particles having a large specific gravity, and to easily prepare the sample in a measurable state in a short time. And providing a sampling method and a sampling sheet used for the particle size distribution measuring device and the particle size distribution measuring device that can measure with only a small amount of sample without requiring a large-scale device for the preparation. Is possible.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram schematically showing the configuration of a particle size distribution measuring apparatus according to an embodiment of the present invention.
FIGS. 2A and 2B are a perspective view and a longitudinal sectional view schematically showing a configuration of a cell in the embodiment.
FIG. 3 is a perspective view schematically showing a configuration of a cell holder in the embodiment.
FIGS. 4A, 4B, and 4C are explanatory diagrams schematically showing a sampling method in the embodiment. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Film body, 1a ... Adhesive surface part, 2 ... Holder, 3 ... Cell, 4 ... Irradiation part, 5 ... Detection means, D ... Particle size distribution measuring apparatus, S ... Sample.

Claims (3)

A cell comprising a film body having optical transparency and an adhesive surface part for adhering a sample and a holder for holding the film body, an irradiation part for irradiating the cell with light, and from the irradiation part A particle size distribution measuring device comprising a detecting means for detecting secondary light generated by irradiating the sample with light of the sample, the holder holding a plurality of the film bodies in a state of being bonded together Characteristic particle size distribution measuring device. A cell comprising a film body having optical transparency and an adhesive surface part for adhering a sample and a holder for holding the film body, an irradiation part for irradiating the cell with light, and from the irradiation part A sampling method for use in a particle size distribution measuring apparatus provided with a detecting means for detecting secondary light generated by irradiating the sample with light of the sample, and a plurality of the film bodies are bonded to the holder A sampling method used in a particle size distribution measuring apparatus, characterized in that the used film body is peeled off for each measurement, and the sample is newly attached to the film body used for measurement. A cell comprising a film body having optical transparency and an adhesive surface part for adhering a sample and a holder for holding the film body, an irradiation part for irradiating the cell with light, and from the irradiation part A sampling sheet used for a particle size distribution measuring device provided with a detecting means for detecting secondary light generated by irradiating the sample with light of a plurality of the film bodies, A sampling sheet used in a particle size distribution measuring device, which is used in a state of being held in a holder and peels off a used film body for each measurement and attaches a sample to a newly exposed film body .

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