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A sample pretreatment reagent and method in the process of measuring arsenic in urine

A technology for sample pretreatment and urine samples, which is applied in the preparation of test samples, measuring devices, and material analysis by optical means, which can solve the problems of cumbersomeness, affecting the accuracy of results, and easy evaporation to dryness

Active Publication Date: 2020-07-14
贵州省疾病预防控制中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method still has defects such as the large amount of sample pretreatment reagents, cumbersome, and easy evaporation to dryness during digestion, which affects the accuracy of the results and the pretreated samples need to be transferred.

Method used

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  • A sample pretreatment reagent and method in the process of measuring arsenic in urine
  • A sample pretreatment reagent and method in the process of measuring arsenic in urine
  • A sample pretreatment reagent and method in the process of measuring arsenic in urine

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Embodiment Construction

[0017] In order to make those skilled in the art understand the method of the present invention more clearly, the applicant further describes in the mode of proof experiment in specific embodiment.

[0018] 1. Experimental part

[0019] 1.1 Principle

[0020] After the urine sample is digested by wet method, add ascorbic acid-thiourea mixture in acidic medium to reduce pentavalent arsenic to trivalent arsenic, then use potassium borohydride as reducing agent to generate arsine, which is loaded into quartz by argon gas It is decomposed into atomic arsenic in the atomizer, and atomic fluorescence is produced under the excitation of the emitted light of the special arsenic hollow cathode lamp.

[0021] 1.2 Instruments and reagents

[0022] 1.2.1 Instruments: AFS-230E dual-channel atomic fluorescence photometer, arsenic hollow cathode lamp and supporting analysis software (Beijing Ruili Analytical Instrument Company), ADE-DI porous self-controlled electrothermal digestion instru...

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Abstract

The invention provides a sample pretreatment reagent for determining arsenic in urine. Digestive fluid contains first digestive fluid and second digestive fluid, wherein the first digestive fluid contains hydrogen peroxide and alkali metal hydroxide. A sample preparation method utilizing the digestive fluid has the characteristics of simplicity and convenience in operation, good stability, high sensitivity, slight interference, wide linear range, short time, low cost, low environmental pollution and the like.

Description

technical field [0001] The invention relates to a sample pretreatment reagent and method for determining arsenic in urine, and belongs to the technical field of atomic fluorescence photometry for determining arsenic in urine. Background technique [0002] The level of arsenic in urine directly reflects the absorption of arsenic at the individual level, and it can quantitatively estimate the absorption of arsenic in the near future. The research on the relationship between the amount of arsenic exposure of individuals in different industries and the various forms of arsenic and total arsenic in urine shows that the level of arsenic in urine is an important indicator for detecting and evaluating occupational arsenic exposure; In endemic areas, a considerable proportion of urine samples from people in high arsenic areas contain high levels of arsenic, which requires long-term monitoring, which is also one of the main indicators for the detection and evaluation of endemic arseni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N1/28
CPCG01N1/28G01N21/6404
Inventor 潘月华潘炯波黄伊彦文郭华陈旭东包夏黎殊
Owner 贵州省疾病预防控制中心