基于激光诱导击穿光谱的大米Cr元素检测

激光诱导击穿光谱(LIBS)是一种元素快速分析的光学检测技术.在工业化发展进程中，重金属污染时刻威胁着大米等粮食作物生产地的安全性.以四川地区常见的Cr元素污染为例，采用双脉冲LIBS技术对市面上购买的五种地区大米中的Cr元素进行定量分析，并与电感耦合等离子体质谱法(ICP-MS)检测结果进行对比.结果显示LIBS测量误差满足相对误差标准，证明了LIBS方法具有对元素进行快速定量分析的能力，是检测大米重金属元素含量的一种有效手段.

Detection and Analysis of Cr Element in Rice by Laser Induced Breakdown Spectroscopy

Laser-induced breakdown spectroscopy (LIBS) is an optical detection technique for rapid elemental analysis. In the process of industrialization, heavy metal pollution always threatens the safety of rice and other food crops production areas. Taking the common Cr element pollution in Sichuan as an example, the double-pulse LIBS technology was used to quantitatively analyze the Cr element in five kinds of rice purchased on the market, and the results were compared with the detection results of inductively coupled plasma mass spectrometry (ICP-MS). The comparison shows that the measurement error of LIBS meets the relative error standard, which proves that LIBS has good quantitative analysis ability in the rapid analysis of elements, and is an effective means to detect the content of heavy metals in rice.