Method for detecting trace metal ionic contaminants in water by plasma spectrometry

等离子体发射光谱法检测水中痕量金属离子污染物的方法

Abstract

The invention discloses a method for detecting trace metal ionic contaminants in water by plasma emission spectrometry. The method is characterized in that a high-voltage pulse power supply is arranged between planar high-voltage electrodes in a reactor, and the spectrum emitted by microporous discharge is collected by utilizing light rays; the characteristic spectral line of the spectrum is contrasted with an existing spectral line to obtain the varieties of trace metal ionic contaminants in water; the spectral peak intensity of the spectrum is contrasted with an existing concentration fitting curve to obtain the concentrations of the trace metal ionic contaminants in water; and a plate-hole-plate electrode is adopted in the reactor to realize discharge, the planar high-voltage electrodes are arranged on the two sides of a main chamber, and an insulating diaphragm electrode with a hole is arranged in the middle of the main chamber. The method and reactor provided by the invention improve the detection timeliness and detection accuracy and precision of trace metal ionic contaminants in water, reduce the detection cost and shorten the detection period.
本发明公开了一种等离子体发射光谱法检测水中痕量金属离子污染物的方法;通过在反应器的平面高压电极间加入高压脉冲电源,利用光线采集微孔放电发射的光谱;通过将光谱的特征谱线与已有谱线进行对比,得到水中痕量金属离子污染物的种类;通过将光谱的谱峰强度与已有浓度拟合曲线对比,得到水中痕量金属离子污染物的浓度;在反应器里采用板孔板的电极来实现放电,平面高压电极设置在主室的两侧,带孔绝缘膜片电极设置在主室的中间;本发明提供的方法和反应器提高了水中痕量金属离子污染物检测的时效性、检测准确度和精度;降低了检测成本,缩短了检测周期。

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