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Optimization method for parameters of analytical instrument used for analysis of forms of elemental arsenic based on HPLC-HG-AFS system

A HPLC-HG-AFS, morphological analysis technology, used in instruments, scientific instruments, analytical materials, etc., can solve problems such as decomposition, and achieve high accuracy and good repeatability.

Inactive Publication Date: 2015-08-19
TIANJIN UNIV
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Problems solved by technology

In addition, many reports point out that if such organic arsenic preparations are used in excess of the standard, some factors will cause them to decompose into toxic arsenic compounds that are strictly prohibited

Method used

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  • Optimization method for parameters of analytical instrument used for analysis of forms of elemental arsenic based on HPLC-HG-AFS system
  • Optimization method for parameters of analytical instrument used for analysis of forms of elemental arsenic based on HPLC-HG-AFS system
  • Optimization method for parameters of analytical instrument used for analysis of forms of elemental arsenic based on HPLC-HG-AFS system

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0031] One, the experimental apparatus and reagent used in the present invention

[0032] 1. Experimental equipment

[0033] The instruments used in the experiment mainly include: AFS9600 non-dispersive hydride generation-atomic fluorescence spectrometer (HG-AFS) (Beijing Haiguang Instrument Co., Ltd.), HPLC P600 high performance liquid chromatography pump (US Labtech Company), equipped with 7725i six-way sampling valve (Rheodyne, Cotati, USA), Phenomenon C18 chromatographic column (Luna5u, 250×4.60mm). The structure diagram of HPLC-UV-HG-AFS system is as follows Figure 1-2 shown.

[0034] 2. Experimental reagents

[0035] All reagents used in the experiment were of analytical grade. Reagents used in the experiment: NaOH (Tianjin Fengchuan Chemical Reagent Co....

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Abstract

The invention discloses an optimization method for the parameters of an analytical instrument used for analysis of the forms of elemental arsenic based on an HPLC-HG-AFS system. The method comprises the following steps: optimization of high performance liquid chromatographic separation conditions; optimization of hydride generation conditions; and optimization of the parameters of an atomic fluorescence detector. Under the above-mentioned optimized conditions, three forms of arsenide, i.e., 4-aminobenzenearsonic acid, 4-hydroxy-3-nitrophenylarsonic acid and 4-nitrophenylarsonic acid respectively with a concentration of 0.1 to 2 [mu]g / mL are separately used for mixed-standard calculation of standard curves of the HPLC-HG-AFS system. Compared with the prior art, the method provided by the invention has good repeatability and high accuracy under the optimized conditions.

Description

technical field [0001] The invention relates to an analysis and testing technology for the organic form of elements, in particular to an analysis method for the form of arsenic. Background technique [0002] Chemical morphology analysis of different compounds of various elements is very important for understanding the toxicity, metabolism and transport properties of elements in environmental, geological and biological samples. Therefore, speciation analysis has become an active research field in recent years field. Arsenic is an essential element for the human body, and is the basic constituent element of many compounds in the environment and biological samples, but the toxicity of different forms of arsenic varies greatly. In general, inorganic arsenic compounds are more toxic than organic arsenic compounds. Arsenic compounds with different valence states have different toxicity. For example, it is reported that arsenous acid is easily soluble in water, and its toxicity i...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 赵学玒汪曣杜康蒋学慧孙传强孙运代丽
Owner TIANJIN UNIV
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