JPS5970962A - Measuring apparatus for liquid concentration - Google Patents

Abstract

PURPOSE:To measure a quantity of a particular component in a sample solution by an apparatus wherein a column filled with solid matter is used in a flow injection mechanism instead of addition of a reagent solution to measure a dissolved amount of the solid component contained in the effluent. CONSTITUTION:A sample is first sent out of a liquid tank, etc. by means of a feeding tube 1 and feeding pump 2, and then divided at a branching point 3 into two streams one of which passes through a feeding tube 4 and a reference cell 5a of a colorimeter in a detecting section, and the other of which passes through a feeding tube 6, four- way selector 7, feeding tube 8 and a four-way selector 9 and is then discharged after passing a sample cell 5b. When the selectors 7, 9 are switched simultaneously, the sample now flows into the cell 5b through the tube 6, selector 7, column 7 and the selector 9. By keeping such a state for a certain time, a cleaning solution initially filled in the column 12 is discharged and then the sample dissolves a certain quantity of the solid in the column which is determined by a flow rate, while coming into a stationary state. It thus becomes possible to obtain concentration of a particular component in the sample based on the dissolved amount of the solid, by measuring the difference in absorbance between the cells 5a and 5b with a not shown colorimetric mechanism.

Description

[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] This invention involves passing a sample through a column filled with solids that are dissolved by specific components contained in the sample, and analyzing the solid components contained in the effluent. The present invention relates to an i-antibody concentration measuring device for quantifying a specific component in a sample by determining the dissolved amount.

[Prior art and its problems]

In recent years, the flow injection method has been widely used to speed up Leukuff analysis.

In flow injection, the target component is generally quantified by injecting a coloring reagent or precipitant in a solution state into a tube through which the sample flows, and detecting it with a detector installed downstream of the flow, such as a colorimetric device. In some cases, there is no suitable coloring reagent available, or complex pretreatment is required for color development.For example, when quantifying free nitric acid in a sample, there is a problem in that the coloring reagent is oxidized by high concentrations of nitric acid and fades. .

[Purpose of the invention]

The purpose of the present invention is to solve the above-mentioned problems of the prior art, and to quantify components for which a suitable coloring reagent cannot be obtained by using a solid-filled column sound instead of adding a reagent solution in a flow injection mechanism. An object of the present invention is to provide a liquid concentration measuring device that uses the amount of solid dissolved in a liquid as an index, and can perform the following.

[Summary of the invention]

The present invention provides a liquid feeding mechanism using a pump or compressed air, and a flow path switching mechanism J'l+' using a solenoid valve or a sliding valve.
! structure, a solid-filled column, and a solid bath f! using a colorimeter or ion selector. Ha degree 1 JIl
The sample is intermittently introduced into the column by a method of constantly flowing the sample itself and switching the flow path intermittently to dissolve the solids in the column. This is a liquid concentration device that makes it possible to determine the concentration of the target component by intermittently forming a solution of the solid in the column in the flow of the sample itself and recording the degree of solubility.

〔Effect of the invention〕

By using the apparatus according to the present invention, it is possible to measure the amount of a component that is reactive with a solid component contained in a sample, or the mixing ratio of a solution consisting of two components, a poor solvent and a rich solvent, to the solid. is possible. Particularly, in the absence of a general coloring reagent, colorimetric determination can be performed by dissolving a colored solid, which is a more effective measurement method than the method of adding a solution of a coloring reagent.

[Embodiments of the Invention JV, below, the fruits of the present invention will be explained based on the drawings.

Figure 1 shows an apparatus for measuring the strength of floating f nitric acid as an example of the present invention. ) --- The liquid is sent out by the pump 1 and the liquid feeding tube 2, and the branching amount of the liquid feeding tube, I
;3.1A-Kinchibu 4.4'・Reference to the colorimeter of the mountain part 5 (1111 Cell 5a is S-crossed, the other extension is the paper feed Chikov 6.4-way switch 7, feed error Chicove 8. Four-way switch 9'<!01 is the function of the colorimeter of the detection section 5 1HII
The liquid passes through the cell 5b and is drained. At this time, the cleaning liquid tank IO
The cleaning liquid inside is sent out by a liquid pump 11, and the four-way cutter 7 is filled with IJ body, for example, cupric chloride, which is insoluble in the cleaning liquid and has a different dissolution rate depending on the amount of nitric acid in the sample. The liquid flows through the column 12, the four-way switch 9, and the liquid-feeding chicobe 13, and is drained. If the 4-way switch 7 and 9 are switched at the same time, the cleaning liquid will be transferred to the 4-way switch 7, the liquid feeder Chicobe 8.
Direction switch 9.1 Shusan tip 13 c) 1. The liquid is drained, and the sample is transferred to the detection section 5 by connecting the four-way switching device 9 to the column 12.
flows into the sample side cell 5b of the colorimeter. If this state is maintained for a certain period of time, the washing water that was initially filled in the column 12 will be discharged, and the sample will become in a steady state by dissolving the solids in the column 12 at a constant h1 determined according to the flow rate, which is not shown in the figure. If the absorbance difference between the sample, the sample side cell and the reference side cell is determined using an external colorimetric method 4j4, the sample passes through the column 12 at J.
It is to find the solid that dissolves when passing through +
). 4. Using ILJ as a standard sample. (If the dose line is 1'
If it is ↑9, the concentration of the target component can be determined from the dissolved sleeve of the solid by comparison. After this, if the four-way switchers 7 and 9 are switched simultaneously again, the solids in the column 12 are washed with the washing liquid, and unnecessary indium solution due to long-term retention of nitric acid can be avoided.

The solids filling the column 12 are dissolved and washed with sand;
Im back! By using powders or particles of small substances whose volume and surface area do not change rapidly due to This is the case with the historical use of cupric oxide in nitrate measurement. However, the solid in the column 12 is not necessarily limited to a substance with a low dissolution rate, and may be filled with a substance that is saturated or nearly saturated while the sample passes through the column 12. . In this case, the oil supply bonder 24 is temporarily stopped and the sample is transferred to column 1.
Let r8 wl remain in the 2 state for a long time and set it to the 1 state.

[Brief explanation of drawings]

Figure 1 is a system diagram of the free nitrate r37y' measuring device ft according to the present invention. ■...Transfer YCV, tube, 2...Liquid transfer bo/zo, 3 ・
Liquid feeding Chicove branch, 4... Liquid feeding Chicove, 5...
Detection unit, Ria...Reference side cell, 511...Sample side cell, 6...Transfer 71 Kechibu, 7...Four-way switch, 8
...Liquid feeding Chicove, 9...4-way (υ exchanger, 10 ・
Cleaning liquid i7J, 11...liquid feeding pump, 12...column, 13...liquid feeding Chicove. Agent Patent attorney rule Chika λ+11G (1's or 1 person)

Claims (1)

[Claims] It is equipped with nine columns filled with solids that have different dissolution amounts or dissolution rates depending on the concentration of specific components in the sample, a sample flow path switching mechanism, and a solid dissolved concentration measurement mechanism. 141 bodies were dissolved by flowing it through a column,
A liquid concentration measuring device characterized in that it is designed to determine the concentration of a constant component: Cow + J in a sample from the amount of dissolved solid.