Method for stably measuring arsenic and mercury in water by atomic fluorescence spectrometry

Abstract

The invention belongs to the field of water environment monitoring methods, and particularly relates to a method for stably measuring arsenic and mercury in water by atomic fluorescence spectrometry. The method includes a), respectively preparing sample solution containing mercury and thiourea and sample solution containing arsenic and thiourea; b), mixing the sample solution containing the arsenic with potassium borohydride solution to generate arsine steam, and mixing the sample solution containing the mercury with stannous chloride solution to generate mercury steam; and c), guiding the arsine steam and the mercury steam into an atomizer by carrier gas, generating atomic fluorescence by an excitation effect of a special hollow cathode lamp which is a light source, and detecting the intensity of the atomic fluorescence. The content of the arsenic and the content of the mercury in the environmental water are measured by the atomic fluorescence spectrometry, operation is simple, convenient and speedy, labor, time and reagents are saved, and a measurement result is stable and reliable after the thiourea is additionally used in the method.

Description

technical field [0001] The invention belongs to the field of water environment monitoring methods, in particular to a method for stably determining arsenic and mercury in water by atomic fluorescence spectrometry. Background technique [0002] Arsenic and mercury are toxicological indicators in various water bodies. The water quality standards for various water bodies in my country have strictly regulated the content of arsenic and mercury. Arsenic and mercury in environmental water are required items for environmental monitoring. The determination of arsenic in the past multi-purpose atomic absorption spectrometry, atomic fluorescence spectrometry and inductively coupled plasma emission spectrometry. The determination of mercury is the reduction of stannous chloride or potassium borohydride atomic fluorescence spectrometry, and dithizone photometry. In the prior art, the content of arsenic or mercury in environmental water is usually measured separately, which takes a lot...

AI Technical Summary

Problems solved by technology

In the prior art, the content of arsenic or mercury in environmental water is usually measured separately, which takes a lot of time and manpower, and also consumes more reagents and equipment, which affects the speed of measurement, and the measurement results are greatly affected by the sample and are not stable enough. Therefore, the design of water environment The method of the content of arsenic and mercury in the medium has outstanding practical significance

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