激光诱导等离子体光谱法可用于检测土壤中重金属离子的有效含量。概述了等离子体受激发射光谱的基本原理, 设计了实验仪器。激发光源采用半导体固体激光器, 采用光谱仪做接收, 得出所选取的土壤中金属离子谱线, 对照标准金属离子谱线图, 比较出土壤所含的重金属离子含量, 从而判断土壤是否受到污染。实验证明了该方法对于土壤检测的可行性。

Laser-induced breakdown spectroscopy can be used to detect the effective content of heavy metal ions in soil. The basic principle of emission spectrum from excited plasma is summarized. And the experiment apparatus are designed. A semiconductor solid state laser is used as an excitation light source and a spectrometer is used as a receiver. The spectrum lines of metal ions in selected soil are obtained. Compared with spectrum line graphs of standard metal ions, the content of heavy metal ions in soil is obtained. Whether the soil is polluted or not is determined. The experiments prove that the method is feasible to be used in soil detection.