JP3297420B2 - Automatic component concentration measurement system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for measuring the component concentration of a high-temperature and high-concentration aqueous salt solution such as a liquid in a canned can in a salt-making process.

[0002]

2. Description of the Related Art In a salt-making process, the measurement of the component concentration of a liquid in a can of a cinnamon can is important for controlling and controlling the quality of a salt product. In some cases, an infrared spectrophotometer is used as a measuring means. When installing the measuring part of the infrared spectrophotometer outside the can and measuring the component concentration of the liquid in the can, it is necessary to collect the liquid inside the can and perform the measurement. Is a high temperature of 40 to 120 ° C and has a saturated concentration, and when the liquid in the can is discharged outside the can, the temperature drop causes precipitation of content components. The composition of the liquid in the can collected outside was different, and it was difficult to accurately grasp the component concentration of the liquid in the can.

[0003] In addition, when a measuring part of an infrared spectrophotometer is inserted into a can, and the concentration of a liquid component in the can is directly measured, periodic measurement for obtaining a stable and accurate measurement value is required. It is necessary to perform calibration curve calibration and regular maintenance in the measuring system to eliminate scale adhesion due to gypsum, etc., and this operation is extremely difficult, so perform direct measurement of the liquid concentration in the can. Can not do.

Further, a calibration curve used for measuring the concentration of a liquid component in a can using a conventional infrared spectrophotometer has a problem that a measurement error increases unless a calibration curve suitable for each liquid temperature range in the can is created. In addition, there has been a problem that a calibration curve calibration method for stably obtaining accurate measurement values has not been established. For these reasons, it has been difficult to automatically and stably measure the component concentration of the liquid in the can.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a system for automatically measuring the concentration of a component in a can, which is always stable and accurate.

[0006]

Means for Solving the Problems The present inventor has proposed that the ATR method (attenuated total reflection method) using an infrared spectrophotometer can be used at a high temperature and at a high temperature, such as in a canned can in a salt making process. The present invention was completed by noting that it is possible to measure the component concentration of the aqueous salt solution using an unsaturated solution prepared by diluting a high-concentration aqueous salt solution 10 / 7-fold with water. . That is, means for solving the problems of the present invention are as follows.

(1) A system for automatically measuring the component concentration of a high-temperature and high-concentration aqueous salt solution, which is a collection-dilution system having means for collecting and diluting a measurement solution and washing each flow path , A measurement system having a measurement solution and a background, a measurement of a calibration solution, and a means for performing these measurements at a constant temperature, and a means for cleaning the measurement cell, and a collection-dilution system, each of which constitutes a measurement system. A component concentration automatic measurement system including a control system having means for controlling equipment, inputting, storing, and calculating measurement data, and a means for operating the system. (2) A high temperature and high concentration aqueous salt solution is treated with water. (1) The component concentration automatic measurement system according to (1), wherein the dilution ratio is 10/7 or more, and (3) the system that automatically measures the component concentration of a high temperature and high concentration salt aqueous solution. Wherein the infrared absorption spectrum is measured using a probe-type or flow-cell-type infrared spectrophotometer, wherein the component concentration automatic measurement system according to (1) or (2), In a system that automatically measures the component concentration of a high-concentration saline solution, the target variable is the component concentration, and the explanatory variable is a plurality of wave numbers caused by infrared absorption of water, using a dilute solution of the saline solution corresponding to the temperature range. (1) characterized by using a calibration curve created by multiple regression method with absorbance at
(2) The component concentration automatic measurement system according to any one of (3) and (3). Hereinafter, examples of the automatic component concentration measurement system of the present invention will be described, and the present invention will be described in more detail.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Example] Determination of Dilution Rate The automatic component concentration measurement system of the present invention uses a constant rate of water to a concentration at which contents of a high-temperature in-tank solution do not precipitate even when cooled to around room temperature. Includes a dilution system for dilution to The conditions required to determine the dilution ratio are that no precipitation of content components occurs during cooling, and that component concentration measurement by the infrared ATR method is suitable for measurement of a solution with a relatively high concentration, so that a high concentration can be maintained. There are two points. So, 20 ℃ and 80 ℃
The optimal dilution rate was determined by the following method using the solution in the can.

In the present invention, the term "dilution ratio" indicates a dilution ratio when water is added to an original salt solution to dilute the salt solution. 3 parts of water is added to 7 parts of the salt solution to make the whole 10 parts. First, the analysis value of each component concentration of calcium chloride, magnesium chloride, and potassium chloride in the solution corresponding to the solution in the 20 ° C can was used as an explanatory variable, and the analysis value of the sodium chloride concentration was used as an objective variable to perform analysis by multiple regression analysis. A prediction formula (equation (1)) for the concentration of sodium chloride at ° C was prepared.

[0010]

C _20pr (NaCl) = 27.19−0.97 C ₂₀ (CaCl ₂ ) −1.06 C ₂₀ (MgCl ₂ ) −0.74 C ₂₀ (KCl) ・ ・ ・ (1) C _20pr (NaCl): chloride at 20 ° C. Predicted value of sodium concentration /% C ₂₀ (x): Analyzed value of component concentration of x at 20 ° C./% (x = CaC
l ₂ , MgCl ₂ , KCl) Next, the dilution ratio was determined to be 10/7, 10/8, 10/10 from the analytical value of the component concentrations of calcium chloride, magnesium chloride, potassium chloride and sodium chloride in the solution corresponding to the solution in the 80 ° C can.
The calculated value of each component concentration was calculated assuming / 9 and 1.
(Equations (2) to (5)).

[0011]

(Equation 2)

[0012]

(Equation 3)

[0013]

(Equation 4)

[0014]

(Equation 5)

Here, the calculated values of the concentration of each component of calcium chloride, magnesium chloride and potassium chloride at each dilution rate are substituted into the prediction formula of sodium chloride concentration at 20 ° C. (formula (1)), and The predicted value of the sodium chloride concentration was determined (Equation (6)), and the predicted value C ′ _20pr (NaCl) was compared with the calculated value C _cal (NaCl) of the sodium chloride concentration at each dilution ratio.

[0016]

[6] _{C '20pr (NaCl) = 27.19-0.97C} cal (CaCl 2) -1.06C cal (MgCl 2) -0.74 C cal (KCl) ·· (6) C' 20pr (NaCl): at 20 ° C. Predicted value of sodium chloride concentration /% The predicted value of sodium chloride concentration C ′ _20pr (NaCl) is 80
The saturated sodium chloride concentration when cooled to 20 ° C in the component composition when the solution corresponding to the solution in the can at ℃ is diluted at each dilution ratio, and the calculated value C _cal (NaCl) is the dilution of the solution corresponding to the solution in the can at 80 ° C The figure shows the concentration of sodium chloride contained when diluted at a specific rate. Equation (7) shows the ratio R of the calculated value to the predicted value of the sodium chloride concentration.

[0017]

(Equation 7) R: Ratio of calculated value to predicted value of sodium chloride concentration /
% Fig. 1 shows the relationship between the ratio R of the calculated value to the predicted value of the sodium chloride concentration and the analytical value of the sodium chloride concentration of the solution in the undiluted 80 ° C can. When R exceeds 100, the components of the solution are expected to precipitate as crystals. Therefore, since the dilution ratio at which the solution equivalent to the 80 ° C. can solution does not cause precipitation even at 20 ° C. is 10/7 or more, the dilution ratio is set to 10/7 or more in the automatic component concentration measurement system of the present invention.

FIG. 2 shows an outline of the automatic component concentration measuring system of the present invention. This system collects and dilutes the liquid in the can.
-Dilution system 1, measurement system 2 for measuring infrared absorption spectrum of diluted solution, control of pumps, valves, measuring instruments, acquisition of measurement data, absorbance difference measurement value, absorbance difference calibration value, component concentration calculation and calculation of calibration coefficient And a control system 3 having a computer for storing and a control panel.

When applied to the salt-making process, the sampling line a is connected to a pipe of a sandbag, the washing line b is connected to a washing water pipe, and the dilution line c and the water supply line d are connected to a tap water pipe. And the calibration lines e1 and e2 are connected to the pipelines of the calibration solution, respectively. The following system flowchart comprises a measurement routine for quantifying the liquid in the can and a calibration routine for calibrating the calibration curve used for quantifying the component concentration of the liquid in the can with two calibration solutions.

A) Measurement Routine In the sampling-dilution system 1, first, the valve V1, the valve V3, and the valve V5 are opened, the pump P1 is operated, the can solution S1 is discharged from the sampling line a, and the valve V5 is closed. The valves V4 and V7 are opened, and the in-can solution S1 is temporarily introduced into the dilution cell C1. Next, the valve V7 is closed, and the in-can solution S1 is fully introduced into the dilution cell C1. After detecting the detection part Sw1 of the liquid level meter L1, the valve V1,
Close the valves V3 and V4, stop the pump P1, open the valve V6, and add tap water W1 from the dilution line c to the dilution cell C1.
To be introduced. Further, after detecting the detection unit Sw2 of the liquid level meter L1, the valve V6 is closed, and the stirrer A1 is operated to prepare a diluted solution.

In the measuring system 2, the stirrer A2 is operated, the valve V8 is opened, and the tap water W2 is supplied from the water supply line d to the measuring cell C.
Temporarily introduced to 2 and after a certain period of time, close valve V8 and close valve V9
Open and drain tap water. In addition, close valve V9,
The valve V8 is opened, and the tap water W2 is fully introduced into the measurement cell C2 from the water supply line d. After waiting until the temperature of the tap water introduced into the measurement cell C2 becomes constant in the constant temperature bath F1, the stirrer A2 is stopped, and the background spectrum is measured by the infrared spectrophotometer I1. After the measurement, the valve V9 is opened, and after tap water is discharged, the valve V9 is closed. Next, pump P2,
Activate the stirrer A2 and temporarily introduce the diluted solution prepared in the collection-dilution system into the measurement cell C2, and after a certain time, pump P2
Is stopped, the valve V9 is opened, and the diluted solution is discharged.

Further, the pump P2 is operated, the valve V9 is closed, the diluted solution is fully introduced, and after filling the measuring cell C2, the pump P2 is stopped. After waiting until the temperature of the diluted solution introduced into the measurement cell C2 becomes constant in the constant temperature bath F1, the stirrer
Stop A2 and measure the infrared absorption spectrum with the infrared spectrophotometer I1. After the measurement, the valve V9 is opened and the diluted solution is discharged. After discharging, close valve V9, open valve V8,
The stirrer A2 is operated to introduce tap water W2 from the water supply line d, and after a certain time, the valve V8 is closed, and the measuring cell C2 is washed. After washing, the valve V9 is opened, the stirrer A2 is stopped, and tap water is discharged.

On the other hand, after the introduction of the diluted solution into the measuring cell C2, the valve V2, the valve V3, the valve V4, the valve V5, and the valve V7 are opened in the sampling-dilution system 1, and the pump P1 is operated.
The washing water B1 is introduced from the washing line b, and the sampling line a on the discharge side is washed. Further, the valve V3, the valve V4, the valve V5, and the valve V7 are closed, the pump P1 is stopped, the valve V1 is opened, the washing water B1 from the washing line b is introduced, and the sampling line a on the side of the sandbag can is washed. .

In the control system 3, a computer D1 and a control panel E1 control a series of valves and pumps and control measuring instruments in accordance with the above-mentioned measurement routine, and a computer D1 captures an infrared absorption spectrum.
The absorbance difference of the six wave numbers shown below is determined, the absorbance difference is corrected using the calibration coefficient calculated in -b) described below, and the relationship between each component concentration and the absorbance difference is calculated using the corrected absorbance difference. The concentration of each component is calculated by the formula, and the measured data is stored.

B) Calibration Routine In the measurement system 2, the stirrer A2 is operated, the valve V8 is opened, and tap water W2 is temporarily introduced into the measurement cell C2 from the water supply line d. After a certain time, the valve V8 is closed, and the valve V9 is closed. Open and drain tap water. Further, the valve V9 is closed, the valve V8 is opened, and the tap water W2 is fully introduced into the measuring cell C2 from the water supply line d. The temperature of tap water introduced into measurement cell C2 is
After waiting until it becomes constant by F1, the stirrer A2 is stopped, and the background spectrum is measured by the infrared spectrophotometer I1. After the measurement, the valve V9 is opened, and after tap water is discharged, the valve V9 is closed.

Next, the valve V10 is opened, the stirrer A2 is operated, and the calibration solution STD1 is temporarily introduced into the measuring cell C2 from the calibration line e1, and after a certain time, the valve V10 is closed and the valve V9 is opened.
Drain calibration solution STD1. In addition, close valve V9,
The valve V10 is opened, and the calibration solution STD1 is fully introduced from the calibration line e1. After closing the valve V10 and waiting until the temperature of the calibration solution STD1 introduced into the measurement cell C2 becomes constant in the thermostatic bath F1, the stirrer A2 is stopped, and the infrared absorption spectrum is measured by the infrared spectrophotometer I1. After the measurement, the valve V9 is opened, and the calibration solution STD1 is discharged. After discharging, open the valve V11, operate the stirrer A2, and perform the calibration solution STD2 from the calibration line e2.
Is temporarily introduced into the measurement cell C2, and after a certain time, the valve V11 is closed, the valve V9 is opened, and the calibration solution STD2 is discharged.

Further, the valve V9 is closed, the valve V11 is opened, and the calibration solution STD2 is introduced from the calibration line e2. The valve V11 is closed, and the calibration solution STD2 introduced into the measurement cell C2
After waiting until the temperature of the
Stop A2 and measure the infrared absorption spectrum with the infrared spectrophotometer I1. After the measurement, open the valve V9 and set the calibration solution ST
Emit D2. After discharging, the valve V9 is closed, the valve V8 is opened, the stirrer A2 is operated, tap water W2 is introduced from the water supply line d, and after a certain period of time, the valve V8 is closed and the measuring cell C2 is washed. Open valve V9, stop stirrer A2, and discharge tap water.

In the control system, the computer D1 and the control panel E1 control a series of valves and pumps and control the measuring equipment in accordance with the above-mentioned calibration routine, and the computer D1 takes in the infrared absorption spectrum of each calibration solution. Then, the absorbance differences of the six wave numbers shown below are determined, and the calibration coefficients are calculated by the relational expression for calibration curve calibration using the absorbance differences, and the calibration data is stored.

Preparation of Calibration Curve Used for Measurement of Component Concentration The concentration of each component (C (x)) of calcium chloride, magnesium chloride, potassium chloride and sodium chloride in the liquid in the can is calculated by using the objective variable as the component concentration and the explanatory variable as water. Table 1 due to absorption
Absorbance difference (difference between measured wave number and reference wave number) of 6 sets of wave numbers described in (A _k : k = 1 to 6 (k corresponds to the number of wave number set in Table 1))
It can be calculated by the multiple regression equation of equation (8).

[0030]

C (x) = α ₀ (x) + α ₁ (x) A ₁ + α ₂ (x) A ₂ + α ₃ (x) A ₃ + α ₄ (x) A ₄ + α ₅ (x) A ₅ + α ₆ (x) A ₆ ... (8) _Ak : Absorbance difference of each wave number (k = 1 to 6) C (x): Concentration /% of x (x: CaCl ₂ , MgCl ₂ , KCl, NaCl) α _m (x): constant (x: CaCl ₂ , MgCl ₂ , KCl, NaCl, m = 0 to 6)

[0031]

【table 1】

In the automatic component concentration measuring system of the present invention, a calibration curve was prepared using a diluting solution for a calibration curve in a wide temperature range in order to prepare a calibration curve independent of the liquid temperature in the can. The calibration curve was obtained by measuring the difference in absorbance at 20 ° C using a dilute solution obtained by diluting 90 points of the solution in the can at 20,40,60,80 ° C with water 10/7 times. The coefficient of equation (8) α _m (x) (x: CaCl ₂ , MgCl ₂ , K
Cl, NaCl, m = 0-6). (9)
Equations (12) show calibration curves used for measuring the concentration of each component.

[0033]

## EQU9 ## C (CaCl ₂ ) = 5.30-3.40A ₁ + 1.58A ₂ + 621.34A ₃ -47.99A ₄ + 46.27A ₅ + 203.50A ₆ … (9)

[0034]

C (MgCl ₂ ) = 0.23-13.93A ₁ + 1.28A ₂ -271.69A ₃ + 49.41A ₄ + 23.37A ₅ -70.99A ₆ … (10)

[0035]

C (KCl) = 17.85-25.63A ₁ + 10.66A ₂ -143.48A ₃ -223.71A ₄ -289.05A ₅ + 183.59A ₆ … (11)

[0036]

C (NaCl) =-16.53 + 21.24A ₁ -12.71A ₂ -582.26A ₃ + 135.44A ₄ + 234.15A ₅ -229.73A ₆ … (12) A _k : Absorbance difference of each wave number (k = 1-6) C (x): predicted value /% of component concentration of x (x: CaCl ₂ , MgCl ₂ , KCl, Na
Cl) Quantification of can solution The effectiveness of the calibration curve created above is shown below.
An infrared absorption spectrum was measured at 20 ° C. using a diluted solution of the in-can solution 10 / 7-fold with water at 20 ° C., and a calibration curve was obtained using the obtained absorbance difference (A ′ _k ) ((9) The liquid in the can was quantitatively determined by substituting into the equations (Equations to (12)) (Equations (13) to (16)).

[0037]

C _pr (CaCl ₂ ) = 5.30-3.40A ′ ₁ + 1.58A ′ ₂ + 621.34A ′ ₃ −47.99A ′ ₄ + 46.27A ′ ₅ +203.50 A ′ ₆ … (13)

[0038]

C _pr (MgCl ₂ ) = 0.23-13.93A ′ ₁ + 1.28A ′ ₂ −271.69A ′ ₃ + 49.41A ′ ₄ + 23.37A ′ ₅ −70.99 A ′ ₆ … (14)

[0039]

## EQU15 ## C _pr (KCl) = 17.85-25.63A ' ₁ + 10.66A' ₂ -143.48A ' ₃ -223.71A' ₄ -289.05A ' ₅ +183 .59A' ₆ ... (15)

[0040]

C _pr (NaCl) =-16.53 + 21.24A ′ ₁ -12.71A ′ ₂ −582.26A ′ ₃ + 135.44A ′ ₄ + 234.15A ′ ₅ -22 9.73A ′ ₆ … (16) A ′ _k : Absorbance difference of each wave number of solution in can solution (k = 1 to 6) C _pr (x): Measured value of x component concentration /% (x: CaCl ₂ , MgCl ₂ , KCl,
(NaCl) For comparison, a calibration curve was prepared in the same manner as above using 24 dilute solutions obtained by diluting a solution equivalent to the solution in the can at 60 ° C 10/7 times with water.
(Equations (17) to (20)) were prepared, and the liquid in the can was quantified ((2
Expressions 1) to (24)).

[0041]

(17) C (CaCl ₂ ) = 19.21-9.32A ₁ + 0.83A ₂ + 1362.84A ₃ -57.95A ₄ + 28.67A ₅ + 240.74A ₆ … (17)

[0042]

(18) C (MgCl ₂ ) =-10.04-9.80A ₁ + 1.86A ₂ -888.02A ₃ + 38.17A ₄ + 37.10A ₅ -132.44A ₆ … (18)

[0043]

(19) C (KCl) = 12.16-43.25A ₁ + 6.97A ₂ -324.94A ₃ -116.28A ₄ -340.10A ₅ + 26.29A ₆ ... (19)

[0044]

C (NaCl) =-18.38 + 44.45A ₁ -9.49A ₂ -674.48A ₃ + 93.53A ₄ + 299.74A ₅ -54.23A ₆ … (20) A _k : Absorbance difference of each wave number (k = 1~6) C (x): predicted value of the component concentration of _{x /% (x: CaCl 2} , MgCl 2, KCl, NaCl)

[0045]

## EQU21 ## C _pr (CaCl ₂ ) = 19.21-9.32A ′ ₁ + 0.83A ′ ₂ + 1362.84A ′ ₃ -57.95A ′ ₄ + 28.67A ′ ₅ +240.7 4A ′ ₆ …(twenty one)

[0046]

C _pr (MgCl ₂ ) =-10.04-9.80A ′ ₁ + 1.86A ′ ₂ -888.02A ′ ₃ + 38.17A ′ ₄ + 37.10A ′ ₅ -132.4 4A ′ ₆ …(twenty two)

[0047]

## EQU23 ## C _pr (KCl) = 11.66-43.25A ' ₁ + 6.97A' ₂ -324.94A ' ₃ -116.28A' ₄ -340.10A ' ₅ +26.29 A' ₆ … (23)

[0048]

C _pr (NaCl) = − 18.38 + 44.45A ′ ₁ −9.49A ′ ₂ −674.48A ′ ₃ + 93.53A ′ ₄ + 299.74A ′ ₅ −54.2 3A ′ ₆ … (24) A ′ _k : Absorbance difference of each wave number of the solution dilution solution in the can (k = 1 to 6) C _pr (x): Measurement value /% of component concentration of x (x: CaCl ₂ , MgCl ₂ , KCl,
The mean squared prediction error MSEP was used to evaluate the accuracy of the measured values of NaCl).
Equation (25) shows the definition.

[0049]

(Equation 25) MSEP: Mean square prediction error N: Number of samples C _pr (x): Measurement value /% of component concentration of x (x: CaCl ₂ , MgCl ₂ , KCl, Na
Cl) C _act (x): Analytical value of x component concentration /% (x: CaCl ₂ , MgCl ₂ , KCl, N
aCl)

Table 2 shows the mean square prediction error of the measured value of each component concentration when the liquid in the can was quantified using the calibration curve at 20 to 80 ° C. and the calibration curve at 60 ° C. For all the components, the prediction error was smaller when the calibration curve at 20 to 80 ° C was used than when the calibration curve at 60 ° C was used. This is because, in a high-concentration aqueous salt solution such as the liquid in a canned can in the salt-making process, the degree of saturation of the component varies depending on the temperature, and this is diluted by a factor of 10 to make it unsaturated. This is the effect of equalizing the influence of the degree of saturation. Therefore, based on the present invention, by creating a calibration curve using a dilute solution obtained by diluting a solution corresponding to the in-can solution in a wide temperature range, it is possible to eliminate the in-can solution temperature dependency of the measured value of the in-can solution, Quantification was possible with sufficient accuracy.

[0051]

[Table 2]

[0052]

The system for automatically measuring the concentration of components according to the present invention comprises:
Even if the liquid in the can is discharged out of the can, no precipitation of the contents occurs when collecting the liquid in the can or when measuring the component concentration. It is an automatic measurement system that can perform measurement automatically, and can greatly contribute to automation of salt production process, labor saving and cost reduction.

[Brief description of the drawings]

FIG. 1 is a graph showing a relationship between a ratio R of a calculated value to a predicted value of a sodium chloride concentration and an analysis value of a sodium chloride concentration of a solution in an undiluted 80 ° C. can. ○: 10/7 dilution, □: 10/8 dilution, Δ: 10/9
Double dilution, ◇: No dilution

FIG. 2 is a schematic diagram of a system for automatically measuring a component concentration in a salt production process according to an embodiment of the present invention.

[Explanation of symbols]

1 ・ ・ ・ Sampling-dilution system, 2 ・ ・ ・ Measurement system, 3 ・ ・ ・ Control system, V1 ~ V11 ...
・ Valve, P1, P2 ・ ・ ・ Pump, A1, A2 ・ ・ ・ Stirrer, C1 ・ ・ ・ Dilution cell, C2 ・ ・ ・ Measurement cell, D1 ・ ・ ・ Computer, E1 ・ ・ ・ Control panel, F1 ・ ・ ・Constant temperature bath, L1: liquid level meter, Sw1, Sw2: detection unit, I1: infrared spectrophotometer, a: sampling line, b: cleaning line, c: dilution Line, d ... water supply line, e1, e2 ...
Calibration solution line S1: Liquid in can, B1: Cleaning water, W1, W2: Tap water, STD1, STD
2 ・ ・ ・ Calibration solution

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI G01N 35/00 G01N 35/00 E 35/10 35/06 K (58) Field surveyed (Int.Cl. ⁷ , DB name) G01N 35/08 G01N 21/27 G01N 21/35 G01N 33/00 G01N 35/00 G01N 35/10 JICST file (JOIS)

Claims (4)

(57) [Claims] 1. A system for automatically measuring the component concentration of a high-temperature and high-concentration aqueous salt solution, comprising a sample-dilution system having means for collecting and diluting a measurement solution and washing each channel, Diluted measurement solution and background,
Measurement of calibration solution, and means for performing these measurements at a constant temperature, and a measurement system having means for cleaning the measurement cell, and collection-dilution system, control of each device constituting the measurement system, input of measurement data, An automatic component concentration measurement system comprising a control system having means for performing storage and calculation, and means for operating the system. 2. The component concentration automatic measurement system according to claim 1, wherein a dilution ratio of diluting a high temperature and high concentration aqueous salt solution with water is 10/7 or more. 3. A system for automatically measuring the component concentration of a high-temperature and high-concentration saline solution, wherein an infrared absorption spectrum is measured using a probe-type or flow-cell-type infrared spectrophotometer. Claim 1 or 2
The automatic component concentration measurement system according to 1. 4. A system for automatically measuring the component concentration of a high-temperature and high-concentration saline solution, wherein the objective variable is the component concentration and the explanatory variable is water, using a dilute solution of the saline solution corresponding to the temperature range. 4. The automatic component concentration measurement system according to claim 1, wherein a calibration curve created by a multiple regression method using absorbance at a plurality of wave numbers caused by infrared absorption is used.