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New method for detecting trace amount bromate

A bromate and trace technology, which is applied in the field of ion chromatography-post-column derivatization analysis system for efficiently detecting trace bromate, and achieves the effects of high practical value, high sensitivity, high sensitivity and selectivity

Inactive Publication Date: 2012-04-11
ZHEJIANG UNIV
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Problems solved by technology

Compared with packed columns, monolithic columns have the advantages of small mass transfer resistance and low column pressure, but there is no report on the separation and determination of trace bromate by monolithic columns.

Method used

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  • New method for detecting trace amount bromate
  • New method for detecting trace amount bromate
  • New method for detecting trace amount bromate

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Embodiment Construction

[0017] The present invention provides a new analysis method for trace bromate, using a Dionex ICS-2000 ion chromatograph, a post-column derivatization system and an ultraviolet detector to achieve high sensitivity and high detection efficiency of trace bromate in a short time Selective detection greatly improves the analysis efficiency.

[0018] The invention utilizes a self-made high-capacity anion-exchange column to separate bromate, then uses potassium iodide as a post-column derivatization reagent, carries out oxidation-reduction reaction with bromate ion under acidic conditions, and finally detects with an ultraviolet detector. The device diagram is as follows figure 1 shown.

[0019] figure 1 A schematic diagram of a new method for the determination of trace bromate. The specific implementation steps are: by Dionex ICS-2000 ion chromatograph, mobile phase (20mmol L -1 KOH solution, produced by EGC-KOH potassium hydroxide eluent generator) at 0.8 mL min -1 The flo...

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Abstract

The invention relates to a trace amount anion analysis method, and in particular relates to an ion chromatography- postcolumn derivation analytic system for effectively detecting trace amount bromate. In the anion analytical method for detecting trace amount bromate, the trace amount bromate is detected by an ion chromatography-postcolumn derivation-ultraviolet detection analytic system with very high sensitivity and selectivity. A home-made ion exchange column with high exchange capacity is used for separation, and potassium iodide is used as a postcolumn reaction reagent, the content of trace amount bromate is indirectly detected by the ultraviolet detection method with high sensitivity and good selectivity. Compared with the traditional ion chromatography-postcolumn derivation ultraviolet detection method, the technical scheme has the advantage of reducing the use of a suppresser and an electrical conductivity detector and can be used for detecting trace amount bromate with high sensibility and high selectivity.

Description

technical field [0001] The invention relates to a trace anion analysis method. In particular, it relates to an ion chromatography-post-column derivatization analysis system for highly efficient detection of trace bromate. [0002] Background technique [0003] With the improvement of people's attention to food safety, the determination of carcinogenic anions in food has attracted more and more attention, especially bromate ion. Bromate is a disinfection by-product produced when ozone is used to disinfect drinking water. In addition, bromate has been widely used in flour additives, because it can play a slow oxidation role in flour fermentation and baking process, which can significantly improve dough structure and performance. However, studies have found that bromate has carcinogenic effects. Therefore, since the 1980s, the International Agency for Research on Cancer has listed it as a potential carcinogen of 2B level, and various countries have also formulated bromate co...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/60
Inventor 王娜妮朱岩
Owner ZHEJIANG UNIV
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