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Laser-induced breakdown spectroscopy for detection of heavy metals in environmental samples

机译：激光诱导击穿光谱法检测环境样品中的重金属

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Abstract: The application of LIBS technology as a sensor for heavy metals in solid environmental samples has been studied. This specific application introduces some new problems in the LIBS analysis. Some of them are related to the particular distribution of contaminants in the grained samples. Other problems are related to mechanical properties of the samples and to general matrix effects, like the water and organic fibers content of the sample. An attempt has been made to optimize the experimental set-up for the various involved parameters. The understanding of these factors has enabled the adjustment of the technique to the substrates of interest. The special importance of the grain size and of the laser-induced aerosol production is pointed out. Calibration plots for the analysis of heavy metals in diverse sand and soil samples have been carried out. The detection limits are shown to be usually below the recent regulation restricted concentrations.!33
机译：摘要：研究了LIBS技术作为固体环境样品中重金属传感器的应用。此特定应用程序在LIBS分析中引入了一些新问题。其中一些与颗粒状样品中污染物的特定分布有关。其他问题与样品的机械性能和一般的基质效应有关，例如样品中的水和有机纤维含量。已尝试针对各种相关参数优化实验设置。对这些因素的理解使得能够将技术调整为感兴趣的基底。指出了晶粒尺寸和激光诱导的气溶胶生产的特殊重要性。已经进行了用于分析各种沙子和土壤样品中重金属的校准图。结果表明检出限通常低于最近的法规限制浓度！！ 33

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