激光诱导击穿光谱检测牛奶中的Na元素  

Determination of Na in milk samples by laser induced breakdown spectroscopy

作　　者：徐媛[1] 姚明印[1] 刘木华[1] 

机构地区：[1]江西农业大学生物光电及应用重点实验室,江西南昌330045

出　　处：《光电子．激光》2013年第5期1032-1036,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(30972052);新世纪优秀人才支持计划(090168);江西省科技厅科技支撑计划(2010BSB08091)资助项目

摘　　要：采用激光诱导击穿光谱(LIBS)技术,检测了牛奶样品中的Na元素含量。实验共分析了15个牛奶样品,其中9个已知样品作为定标样品,采用偏最小二乘法(PLS)建立Na元素定量分析的回归模型;使用另外6个作为待测样品,用以检验模型的定量分析结果。检测出了6个待测样品中的Na元素含量,其中检验样品中参考含量和预测含量之间的线性相关度达到0.993 8,相对误差均在15%以下。检测结果表明,LIBS技术能快速准确地检测牛奶中的Na含量,表现出较好的应用潜力。Laser-induced breakdown spectroscopy （LIBS） technique has a powerful application in elements detection, so it has become a popular object for scholars. In this article, the Na content of milk samples is detected using LIBS. A total of 15 milk samples are analyzed,of which 9 known samples are used as the calibration samples,and a regression model for quantitative analysis of Na is established by using the method of partial least squares （PLS） ;other 6 samples are used as the test samples to verify the results of quantitative analysis by the model. The LIBS is used to detect the Na content in 6 test samples, and the linear correlation coefficient between reference content and predicted content is 0. 993 8 with the relative error less than 15%. LIBS technology can rapidly and accurately measure the Na content in the milk,which indicates a great application potential.

关 键 词：光谱学 激光诱导击穿光谱(LIBS) Na 定量检测 偏最小二乘法 

分 类 号：O433.4[机械工程—光学工程]