JPH0715478B2 - Chromatograph autosampler - Google Patents

Description

TECHNICAL FIELD The present invention relates to an autosampler for injecting a sample into a gas chromatograph or a sample injection part of a chromatograph.

(Prior Art) In an autosampler for a gas chromatograph or a liquid chromatograph, a turntable with a plurality of sample bottles and a turntable with a cleaning solution are arranged facing each other across a space, and a control mechanism is provided above the turntable. Horizontal
A syringe that is vertically movable is provided. Then, the syringe is moved horizontally and vertically to suck the liquid from the sample bottle, inject it into the sample injecting section, and then wash it.

(Problems to be Solved by the Invention) According to the above device, since the syringe is driven in the horizontal and vertical directions, the drive control mechanism is complicated, and the horizontal movement range of the syringe and the turntable are arranged in an array relationship. If it is inaccurate, the syringe hits the sample bottle or the washing bottle and is damaged, making it impossible to continue the automatic analysis thereafter.

In view of the above problems, an object of the present invention is to configure a turntable capable of performing operations such as injecting a sample liquid by vertically moving a syringe, simplifying the moving direction of the syringe, and a driving mechanism thereof. Another object of the present invention is to provide an autosampler for a chromatograph capable of preventing the syringe from being damaged while simplifying the above.

(Means for Solving the Problems) That is, the feature of the present invention is that the first peripheral part has an arcuate notch and a plurality of containers can be arranged on the circumference excluding the notch, And the second turntable is arranged such that the other turntable is recessed into the arcuate notch of one turntable so that the movement paths of the containers of the respective turntables overlap, and the position where the movement paths overlap. The point is that a vertically movable syringe is placed above the.

(Operation) When the arcuate notches of the first and second turntables face each other,
The syringe is passed through the facing space, and when one of the notches is opposed, one turntable is fixed and the other turntable is rotated to inject the sample liquid, wash the syringe, and suck the sample liquid.

(Example) Below, the detail of this invention is demonstrated based on the Example shown in figure.

Each of the drawings shows an apparatus according to an embodiment of the present invention, in which reference numeral 1
Is a turntable having an arcuate notch 11 in a part thereof, 2 is a turntable similarly having an arcuate notch 21, and both the tables 1 and 2 are both rotatably supported by a drive mechanism (not shown). The notches 11 and 21 are supported, and the shapes of the notches 11 and 21 are located above the facing spaces formed at the time of facing each other, and allow the vertically movable syringe 4 to pass through by a driving mechanism (not shown). Notch 1
When one and the other turntables are fixed, one turntable is fixed, and the other turntable is formed so as to be rotatable in a state of being close to the cutout portion of the table. Further, a plurality of washing bottles 1a to 1g are placed on the turntable 1 so as to be positioned directly below the syringe 4 when it is rotated, and similarly, the turntable 2 is similarly provided with the sample bottles 2a to 2g, respectively. It is arranged on the same circumference of the region except 11 and 12 so as to pass through the same point below the syringe 4. Reference numeral 3 in the figure indicates a sample injection part.

According to the apparatus configured as described above, for example, in the case where the cleaning bottle 1b is used for cleaning and the sample liquid of the sample bottle 2b is to be sucked, the syringe 4 after the sample injection is located at the solid line position shown in the figure. With the cutouts 11 and 21 of the turntables 1 and 2 facing each other (FIGS. 1 (A) and (B)), the turntable 2 is fixed and the turntable 1 is rotated counterclockwise. When it reaches the position just below, the syringe 4 is stopped and the syringe 4 is lowered into the washing bottle 1b for washing (FIGS. 2A and 2B). After completion of washing, turntable 1 is turned clockwise so that both notches 11 and 21 face each other, then turntable 1 is fixed and turntable 2 is turned clockwise, and when sample bottle 2b reaches directly under syringe 4. Then, the syringe 4 is lowered into the sample bottle 2b to suck the sample liquid. Next, after raising the syringe 4, the turntable 2 is turned counterclockwise so that the notches 11 and 21 face each other, the syringe 4 is lowered to the position indicated by the dotted line, and the sample liquid is injected into the sample injection unit 3.

(Effects of the Invention) As described above, in the present invention, the first and second containers that have arcuate cutouts on the periphery and that can have a plurality of containers arranged on the circumference excluding the cutouts are provided. The turntables are arranged by placing the other turntable in the arcuate notch of one turntable so that the movement paths of the containers of the turntables overlap each other, and move up and down above the position where the movement paths overlap. Since the possible syringes are arranged, the syringes can be inserted into the containers of the two turntables only by moving them in the vertical direction, and the arc-shaped notches are made to face each other so that the syringes can be moved in the vertical direction. Can be reached with.

[Brief description of drawings]

FIG. 1 (A) is a configuration diagram of an apparatus of one embodiment of the present invention, FIG. 1 (B) is a plan view thereof, and FIGS. 2 (A) and 2 (B) are configuration diagrams and a plan view of a cleaning operation by the same apparatus. Figure, Figure 3 (A)
(B) is a block diagram and a plan view in the case of a suction operation by the same apparatus. 1, 2 ...... Turntable 11, 21 ...... Turntable 1, 2 notch 4 ...... Syringe

Claims (1)

[Claims] 1. A first turntable and a second turntable which have arcuate cutouts on the periphery thereof and on which a plurality of containers can be arranged on the circumference excluding the cutouts. A chromatograph in which the other turntable is recessed and arranged in the arcuate notch of one turntable so that the movement paths overlap, and a vertically movable syringe is arranged above the position where the movement paths overlap. For auto sampler.