Device for measuring injection volume of ion chromatograph and method for measuring injection volume

An ion chromatograph and injection volume technology, which is applied in the field of ion chromatograph injection volume measurement devices, can solve the problems of easy evaporation loss of liquid, low gas flow rate, affecting the accuracy of verification, etc., and achieves reliable measurement method and high measurement accuracy. , the effect of accurate measurement results

Active Publication Date: 2020-08-18
QINGDAO SHENGHAN CHROMATOGRAPH TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of low gas flow rate, residual liquid in the quantitative loop, and high gas flow rate, which will take away some liquid in the existing ion chromatograph sample injection volume verification device and sample injection volume verification method, and the test liquid is easy to evaporate and lose, which affects the test. To solve the technical problem of accuracy, provide an ion chromatograph injection volume measurement device and a sample injection volume measurement method with accurate and reliable measurement results

Method used

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  • Device for measuring injection volume of ion chromatograph and method for measuring injection volume
  • Device for measuring injection volume of ion chromatograph and method for measuring injection volume

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Embodiment 1

[0023] figure 1The sample injection valve 2 in the shown embodiment is a six-way valve, and the ports 1-6 are arranged sequentially; the two ends of the quantitative loop 1 are respectively connected to the port 1 and the port 4, the inlet of the infusion pump 7 is connected to the flushing solution 6, and the outlet is connected to the sample injection Port 2 of valve 2, receiving bottle 5 is connected to port 3 of sampling valve 2, sampling pump 4 is connected to port 6 of sampling valve 2, and measurement solution 3 is connected to port 5 of sampling valve 2. When the injection valve 2 is switched to the position where ports 2 and 3 are connected, ports 1 and 6 are connected, and ports 4 and 5 are connected, the infusion pump 7 and receiving bottle 5 cannot be connected to the port of quantitative loop 1, the flushing liquid channel is disconnected, and the sampling pump 4 and measurement solution 3 are connected to the interface of quantitative loop 1, and the measurement ...

Embodiment 2

[0025] figure 2 Another embodiment shown with figure 1 The difference of the illustrated embodiment is that the inlet of the sampling pump 4 is connected to the measuring solution 3 , the outlet is connected to the port 6 of the sampling valve 2 , and the waste liquid pipe 8 is connected to the port 5 of the sampling valve 2 . This is an injection sampling method. First, the measurement solution 3 is sucked into the sampling pump 4, and then injected into the quantitative loop 1, and the excess waste liquid is discharged through the waste liquid pipe 8.

Embodiment 3

[0027] This embodiment is a method for measuring the injection volume using the measuring device of Embodiment 1. The prepared measuring solution 3 is an aqueous solution with a set concentration of 100 grams of water and 30 grams of sodium chloride, and the rinse solution 6 is pure water. Determination steps:

[0028] Switch the sampling valve 2 so that the infusion pump 7 and the receiving bottle 5 are not connected to the interface of the quantitative loop 1, the flushing solution channel is disconnected, the sampling pump 4 and the measurement solution 3 are connected to the interface of the quantitative loop 1, and the measurement solution channel is connected. Sampling pump 4, that is, the syringe pump. Before starting, the piston rod of the syringe pump is calibrated at the zero point of movement, and then the stroke of the syringe piston rod is calculated by the rotation of the motor, and the syringe pump is controlled to deliver a nominal value of 100.00 microliters of...

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Abstract

The invention belongs to an ion chromatograph sample injection volume measurement device and a sample injection volume measurement method, and aims at accurately measuring sampling volumes in full quantitative loop sample injection and partial quantitative loop sample injection of ion chromatographs. According to the ion chromatograph sample injection volume measurement device and the sample injection volume measurement method, a sample injection valve is utilized to ensure that inorganic salt solution and a quantitative loop, and flushing fluid and the quantitative loop are communicated withan ion chromatograph of a measurement solution passage or a flushing channel technical scheme in turn to carry out sample injection volume measurement; and by using the sample injection volume measurement method of the device, the technical problems that in existing ion chromatograph sample injection volume measurement devices and sample injection volume measurement methods, the gas flow rate is low to cause the fact that residual liquid exists in quantitative loops, the gas flow rate is high to cause the fact that certain liquid is brought away, and the measured liquid is easy to evaporate tocause loss and then influence the measurement correctness.

Description

technical field [0001] The invention belongs to a device for measuring the injection volume of an ion chromatograph and a method for measuring the injection volume, in particular to a device for measuring the injection volume of an ion chromatograph and a method for measuring the injection volume. Background technique [0002] Ion chromatography autosamplers are more and more widely used, and already have the function of partial, non-full ring, and sample injection, and the convenience of use has been greatly improved. However, for quantitative loop sampling, especially non-full loop micro-upgrading sampling, the accuracy of sampling volume has been lacking in stable and effective detection devices and methods. Chinese invention patent application, application announcement number CN105115561A, "A Quantitative Loop Volume Verification Device and Verification Method" discloses a quantitative loop, six-way valve, liquid source, liquid injection pump, gas source, gas injection p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/96G01F22/00
CPCG01F22/00G01N30/96
Inventor 张恩来崔成来杨琼朱新勇商荣宁孙阳阳
Owner QINGDAO SHENGHAN CHROMATOGRAPH TECH CO LTD
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