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Detection of toxic metals (lead and chromium) in talcum powder using laser induced breakdown spectroscopy

机译：激光诱导击穿光谱法检测滑石粉中的有毒金属（铅和铬）

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摘要

A laser induced breakdown spectroscopic (LIBS) system was developed using a 266 nm laser and a high-resolution spectrograph (Andor SR 500 i-A) to detect the trace levels of the highly toxic metals such as lead and chromium present in different brands of talcum powder available in the local market. The strongest atomic transition lines of lead (Pb) (405.7 nm) and chromium (Cr) (425.4 nm) were used as spectral markers to simultaneously detect lead and chromium. The LIBS system was calibrated for these two heavy metals, and the system was able to detect 15-20 parts per million (ppm) of lead and 20-30 ppm of chromium in the talcum powder sample. The limits of detection of the LIBS system were also estimated, and they are 1.96 and 1.72 ppm per million respectively for lead and chromium. This study is highly significant due to the use of cosmetic products that could affect the health of millions of people around the globe.
机译：使用266 nm激光和高分辨率光谱仪（Andor SR 500 iA）开发了激光诱导击穿光谱（LIBS）系统，以检测不同品牌滑石粉中痕量水平的高毒金属，例如铅和铬在当地市场有售。铅（Pb）（405.7 nm）和铬（Cr）（425.4 nm）的最强原子跃迁线用作光谱标记，以同时检测铅和铬。 LIBS系统针对这两种重金属进行了校准，该系统能够检测滑石粉样品中的铅含量为15-20 ppm（ppm）和铬含量为20-30 ppm。还估计了LIBS系统的检出限，铅和铬的检出限分别为1.96 ppm和1.72 ppm。由于使用化妆品产品可能会影响全球数百万人的健康，因此这项研究具有重要意义。

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