Pulse voltage driven arc discharge plasma source and portable elemental spectrometer

Abstract

The invention discloses a pulse voltage driven arc discharge plasma source for liquid sample detection. The pulse voltage driven arc discharge plasma source includes a discharge driving system, a plasma generation chamber, and a sample introduction and discharge system. The sample introduction and discharge system includes a sample pool, a two-channel peristaltic pump, a liquid collecting pool, a sample inlet pipe and a drain pipe. A sample solution is introduced into the plasma generation chamber, an alternating current high voltage power supply modulated by an alternating current modulation module is employed to apply high pressure between a metal electrode and an auxiliary electrode so as to generate arc discharge plasma. A plasma atomizer prepared by the invention has the characteristics of small plasma volume, plasma spectral emission, same optimum spectral emission position of elements, low spectral background signal, autoignition and good stability, etc. The advantages bring greater convenience to people in terms of detecting metal elements in water, improve work efficiency, and expand the work area of the prepared detection equipment.

Description

technical field [0001] The invention relates to the technical field of spectroscopic analysis, in particular to a pulse voltage-driven arc discharge plasma source and a portable element spectrometer for liquid sample detection. Background technique [0002] With the increasing metal pollution in the water environment, the demand for the detection of metal ions in water is becoming increasingly strong. At present, the detection of metal ions in food, beverages and household drinking water is also attracting people's great attention. However, most of the traditional detection methods for metal ions in water have complex sample pretreatment, poor selectivity to metal elements, or high equipment costs. The lack of cumbersome steps cannot meet the simple, fast and continuous detection requirements of metal elements in water samples. Therefore, in recent years, people have begun to explore new metal element detection methods that are simple, fast, good in selectivity, high in sens...

AI Technical Summary

Problems solved by technology

Therefore, when performing element measurement, it is necessary to adjust the optical system to collect the spectra emitted by the best emission positions of different elements in order to obtain the best detection effect, which also makes the operation more complicated and introduces operational errors.

[0009] 3. The fluorescent signal generated by the DC-driven atomizer is too high, resulting in a high background signal, which further affects the detection performance

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