Device and method for the detection of heavy metal elements

Abstract

The invention relates to a device and a method for the detection of heavy metal elements. The device comprises a hydride generator unit, a liquid negative electrode glow discharge spectrometer unit and a connection unit connected to the hydride generator unit and the liquid negative electrode glow discharge spectrometer unit. The hydride generator unit makes a sample to be measured generate heavy metal hydride to be measured ; the heavy metal hydride to be measured generated by the hydride generator unit is transported to a positive electrode of a hollow titanium tube via the connection unit, and is lead from the positive electrode of the titanium tube to a glow discharge microplasma, and is excited to generate a characteristic emission spectrum. The device has simple structure, the method is convenient for operation and low in cost, and can conveniently, timely detect heavy metal elements and improve the sensitivity and selectivity to heavy metal elements.

Description

technical field [0001] The invention belongs to the field of atomic spectrum analysis, and relates to a device and method for detecting heavy metal elements, more specifically, to a device for combining a hydride generator and a liquid cathode glow discharge spectrometer for detecting heavy metal elements and Detection method. Background technique [0002] The traditional metal ion detection methods based on spectroscopic techniques mainly include atomic absorption spectrometry and atomic emission spectrometry. Commonly used detection instruments in these methods include flame atomic absorption spectrometer, inductively coupled plasma emission spectrometer and so on. However, these commonly used detection instruments are bulky, expensive, and the detection cost is high, so they are difficult to be used for field analysis and monitoring. With the development of science and technology and the improvement of detection level, people began to study simple, fast and low-cost met...

AI Technical Summary

Problems solved by technology

However, there are still two problems: on the one hand, the improvement of sensitivity is limited, and it only has a good effect on some elements, but it does not have good universality on many toxic and heavy metal elements, and it cannot fully meet the needs of environmental monitoring; on the other hand, On the one hand, although element speciation analysis can be carried out by liquid chromatography separation or solid phase separation of new materials, the process is cumbersome and the cost is relatively high

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