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Compound for ultraviolet-detecting anions containing sulfur by ion chromatography post-column derivatization

An anionic compound, post-column derivatization technology, applied in color/spectral property measurement, measurement device, material separation, etc., to achieve the effect of improving sensitivity

Inactive Publication Date: 2009-11-04
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no reports on the detection of sulfide, formaldehyde sulfoxylate, sulfite, thiosulfate and thiocyanate by direct ion chromatography-iodine liquid post-column derivatization UV.

Method used

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  • Compound for ultraviolet-detecting anions containing sulfur by ion chromatography post-column derivatization
  • Compound for ultraviolet-detecting anions containing sulfur by ion chromatography post-column derivatization
  • Compound for ultraviolet-detecting anions containing sulfur by ion chromatography post-column derivatization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] The specific steps of separation and detection of sodium sulfide, sodium sulfite, sodium thiosulfate, sodium sulfite hydrate and sodium thiocyanate are as follows:

[0020] 1. Preparation of standard solutions of sodium sulfide, sodium sulfite, sodium thiosulfate, formaldehyde hydrate sodium sulfite, and sodium thiocyanate: weigh a certain amount of analytical reagent to prepare 1000mg.L -1 When used, the standard stock solution is diluted into a standard use solution according to the sample content, and the standard stock solution and use solution are newly prepared every day.

[0021] 2. Selection of eluent: test different ratios of eluent, and finally determine it as 4.5mmol L -1 Na 2 CO 3 +0.08mmol·L -1 Na 2 HCO 3 , can successfully separate five kinds of anions.

[0022] 3. Selection of derivative solution: test different concentrations of iodine solution and acidity to achieve the best absorption value, this example is 0.25% I 2 and 0.02% (V:V)H 3 PO 4 . ...

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PUM

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Abstract

The invention relates to a compound for ultraviolet-detecting anions containing sulfur by ion chromatography post-column derivatization and provides a new method for detecting anions containing sulfur. The method comprises the following steps: anions reacts with acidized iodine solution after being separated by ion chromatography; the acidized iodine solution enters a knotted reaction tube after passing through a post-column derivative device and generates oxidation-reduction reaction with the anions which contains sulfur and also enters the knotted reaction tube after flowing out of chromatography; and finally three-valent iodide ions are generated and leading the three-valent iodide ions generated finally to have the strongest ultraviolet absorption peaks by adjusting the concentration and acidity of different iodine solutions, thus greatly improving the sensitivity of detection. The invention can be applied to aminated compounds for environmental monitoring, food safety, biological medicine, health and epidemic prevention and the like.

Description

technical field [0001] The invention provides a new method for determining sulfur-containing anion compounds by ion chromatography-post-column derivatization ultraviolet detection method. During the measurement, the sulfur-containing anion compounds are separated by ion chromatography, and then enter the braided reaction tube through a tee joint, and at the same time The derivative solution also enters the braided reaction tube through the post-column derivatization device through the three-way joint, and the separated anion compound reacts with the derivative solution. The reactant is detected by ultraviolet light. This method can determine the anion with reducing sulfur content. Background technique [0002] At present, the detection methods of sulfur-containing anion compounds include capillary electropulse method, pulse amperometry, high performance liquid chromatography, spectrophotometry and ion chromatography. It has been reported in the literature that the determinat...

Claims

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Application Information

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IPC IPC(8): G01N30/74G01N21/33
Inventor 陈梅兰叶明立朱岩
Owner ZHEJIANG SHUREN UNIV
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