Online enrichment minitype low-temperature plasma atomic emission arsenic measurement analysis device

Abstract

The invention discloses an online enrichment minitype low-temperature plasma atomic emission arsenic measurement analysis device. The device comprises an online enrichment-sampling system, a gas-liquid separator and a minitype low-temperature plasma atomic system which are sequentially connected; after products in the online enrichment-sampling system enter into the gas-liquid separator, separatedarsenic gas components enter into the minitype low-temperature plasma atomic system; the minitype low-temperature plasma atomic system comprises a reaction pipe, two parallel electrode plates and a high-voltage high-frequency power supply; after the arsenic gas components enter into the reaction pipe, under the action of the plasma, the arsenic gas components are atomized and form a plasma torch.The analysis device further comprises an atomic emission detection system, wherein the atomic emission detection system comprises a convex lens collimator, an optical fiber and a detector. The convexlens collimator focalizes the plasma to emit an arsenic element characteristic spectrum, and the arsenic element characteristic spectrum is transmitted by the optical fiber and detected by the detector. A result of using the device to detect the arsenic element in multiple environment water samples and soils indicates that the device is suitable for the fast, on-site and accurate detection of thearsenic element in the multiple environment water samples and soils.

Description

technical field [0001] The invention relates to an online enrichment miniature low-temperature plasma atomic emission measurement and analysis device for arsenic, which belongs to the technical field of environmental analysis chemistry and instruments. Background technique [0002] Arsenic is one of the widespread toxic pollutants. China's Shanxi, Inner Mongolia and other places, and some countries in South Asia are facing serious problems of arsenic pollution in groundwater. Chronic poisoning of arsenic in drinking water has become an important pollution threat affecting people's health in South Asian countries and parts of my country. Sensitive and rapid determination of arsenic is of great significance for controlling arsenic pollution and avoiding arsenic poisoning. At present, the detection of arsenic in actual environmental samples mainly relies on atomic absorption spectroscopy, hydride generation atomic fluorescence spectroscopy, and inductively coupled plasma mass...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that the existing arsenic analysis devices cannot analyze on-site and have poor detection sensitivity and anti-interference ability, the present invention provides an online enrichment miniaturized sensitive analysis device for arsenic analysis in water samples. The technical scheme adopted is as follows:

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