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Novel method for measuring arsenic in urine

A new type of technology, AFS-230E, applied in the field of arsenic determination in urine by atomic fluorescence spectrometry, can solve the problems of large amount of pretreatment reagents, affecting the accuracy of the results, and sample transfer, etc., to shorten the operation steps and time, optimize the Composition, the effect of increasing speed

Inactive Publication Date: 2016-09-21
潘月华
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Problems solved by technology

This method still has the disadvantages of using a large amount of sample pretreatment reagents, which is cumbersome, and is easy to evaporate to dryness during digestion, which affects the accuracy of the results and the pretreated samples need to be transferred.

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  • Novel method for measuring arsenic in urine
  • Novel method for measuring arsenic in urine
  • Novel method for measuring arsenic in urine

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Embodiment Construction

[0039] In order to make those skilled in the art understand the method of the present invention more clearly, the applicant makes further descriptions in the form of proof experiments in specific examples.

[0040] 1. Experimental part

[0041] 1.1 Principle

[0042] 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.

[0043] 1.2 Instruments and reagents

[0044] 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 digestio...

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Abstract

The invention discloses a novel method for measuring arsenic in urine. AFS-230E double-channel atomic fluorescence photometer is used to quantitatively measure arsenic in urine by wet digestion-hydride generation atomic fluorescence method. Select the best instrument conditions, optimize the composition of the digestive solution, change the digestion instrument and digestion vessel in the process of sample pretreatment, standard curve drawing, sample determination and other experimental operations, reduce the concentration and dosage of reagents, and effectively shorten the The operation process and processing time of sample pretreatment are shortened, the sample detection range is broadened, and the detection limit is reduced, making it suitable for the determination of low arsenic, suitable arsenic and high arsenic in urine samples and the detection of arsenic in large quantities of urine samples. Compared with the prior art, the method of the present invention has the advantages of high precision, good sensitivity, accuracy and reliability, simplicity and quickness, less interference, wide linear range, strong practicability and low cost.

Description

technical field [0001] The invention relates to a novel method for measuring arsenic in urine, which belongs to the technical field of atomic fluorescence photometer method for measuring arsenic in urine. Background technique [0002] The level of arsenic in urine directly reflects the absorption of arsenic at the individual level. It can quantitatively estimate the amount of arsenic absorbed by an individual 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 arsenic p...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/6404G01N21/6486
Inventor 潘月华黄伊彦文
Owner 潘月华
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