An Ion Chromatography Single Pump-Column Switching System for Detecting Trace Inorganic Anions in Weak Salts
An inorganic anion and ion chromatography technology, which is applied in measurement devices, material separation, instruments, etc., can solve the problems of troublesome determination and the inability of ion chromatography system to meet the requirements of determination.
Active Publication Date: 2017-01-04
安徽艾博生物科技有限公司
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Problems solved by technology
Due to the interference of high-concentration weak acid anions, the simple ion chromatography system can no longer meet the requirements of determination
At the same time, for different weak salt samples, due to the different retention time of matrix anions, the "heart-cut" (heart-cut) column switching technology and cyclic column switching technology need to optimize the column switching time according to different samples, which brings great confidence in the determination. here comes the trouble
So far, there is no ion chromatography-column switching analysis system using a single pump and a single suppressor, which is suitable for the determination of trace inorganic anions in various weak acid salts
Method used
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Embodiment 1
[0094] The operation steps of the ion chromatography-column switching analysis system for the determination of trace inorganic anions in weak acid salts with single pump and single suppressor are as follows:
[0095] The method is adjusted in turn according to the state A-state B-state C-state B-state D-state C,
[0096] 1. Sample loading, adjust the system to state A, six-way valve and ten-way valve for loading mode. The sample to be tested in the sample bottle is injected into the loop through the first flow path. To ensure that the loop contains enough representative samples, the injection volume must be greater than four times the loop volume. In the examples, the volume of the loop is 25 μL, and the injection volume is 0.5 mL.
[0097] 2. For the neutralization of weak acid salt anions, adjust the system to state B, six-port valve for loading mode, and ten-port valve for sample injection mode. The conductivity monitor starts to record, and the state B time is 0~0.5min. The sam...
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The invention discloses an ion chromatography single pump-column switching system for detecting trace amounts of inorganic anions in weak acid salts, including a sample injection bottle, a quantitative loop, a first waste liquid bottle, an ion exclusion column, a high-pressure infusion pump, and a eluent Generator, anion exchange chromatographic column, anion suppressor, conductivity detector, collection tube, second waste liquid bottle, six-way valve, ten-way valve, the electrolysis device equipped with switch is arranged on the eluent generator, Adjust the connection sequence of the adjacent ports of the six-way valve and the ten-way valve. The ten-way valve and the six-way valve can respectively form a loading mode and a sample injection mode, and then make the system form four connection states, according to state A - state B - state C -State B-state D-state C transformation to adjust the system state, which can be used to detect trace amounts of inorganic anions in weak acid salts. The invention can effectively eliminate the interference produced by high-concentration weak acid anion matrix, and realize the determination of trace inorganic anions in weak acid salts.
Description
[0001] 1. Technical Field: [0002] The invention belongs to a use system for chemical instrument analysis, in particular to an ion chromatography-column switching analysis system that uses a single pump and a single suppressor to determine trace inorganic anions in weak acid salts. [0003] 2. Background technology: [0004] After about 40 years of development, ion chromatography has become a mature technology for the determination of various ionic substances, including inorganic ions and dissociable organic small molecules. It has been widely used in the power and energy industries, as well as in the electronics industry. , Food and beverage industry, chemical industry, pharmaceutical industry, and life sciences have become important branches of chromatographic analysis. For inorganic ions in simple matrix samples, ion chromatography can be easily and directly measured. However, when facing complex matrix sample analysis, simple ion chromatography analysis systems are no longer use...
Claims
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IPC IPC(8): G01N30/22G01N30/20
Inventor 黄忠平王丽丽潘再法
Owner 安徽艾博生物科技有限公司