激光与光电子学进展, 2014, 51 (9): 093001, 网络出版: 2014-08-20   

激光诱导击穿光谱对蕹菜中Pb元素定量分析研究 下载: 562次

Quantitative Analysis of Pb in Ipomoea Aquatica by Laser-Induced Breakdown Spectroscopy
作者单位
江西农业大学生物光电及应用重点实验室, 江西 南昌 330045
摘要
果蔬重金属污染日趋严重,急需发展一种绿色快速无损检测技术。激光诱导击穿光谱(LIBS)是一种新兴的快速检测技术,为了验证LIBS 检测蔬菜中重金属含量的可行性,以新鲜蕹菜为样品,应用共轴双脉冲LIBS 对比分析了有无Pb 污染的蕹菜菜叶的特征光谱。实验选取铅405.78 nm 处的特征谱线作为分析谱线,对7 个样品的发射光谱进行研究,并得到了铅元素真实浓度与其LIBS 强度拟合曲线,相关系数为0.9857。定标模型浓度预测的相对误差在0.928%~15.05%之间,平均为8.31%,而高浓度污染的测量相对误差均低于3%。试验结果表明,LIBS 用于定量分析蕹菜中重金属元素含量是可行的。
Abstract
There is an urgent need to develop a rapid on-site green detection technology for the growing heavy metal pollution of fruit and vegetables. Laser induced breakdown spectroscopy (LIBS) is an emerging technology in detecting material composition. In order to verify the feasibility of the detection of heavy metals in leafy vegetables by LIBS this article discusses the application of LIBS to quantitativly analyze trace elements theoretically. With fresh ipomoea aquatica as the sample, the spectra with and without Pb pollution are analyzed using coaxial double pulse LIBS device. Pb 405.78 nm is selected as the spectral line of Pb, seven samples emission spectra are detected, and fitting curve is obtained, the correlation coefficient is 0.9857. Relative error of predicted concentration from calibration model is between 0.928% ~15.05% , with an average of 8.31% , and when in high pollution level it is less than 3% . The test results show that, the feasibility of LIBS detecting heavy metal elements in ipomoea aquatica is proved.

黎文兵, 刘木华, 黄林, 陈添兵, 何秀文, 欧阳静怡, 姚明印. 激光诱导击穿光谱对蕹菜中Pb元素定量分析研究[J]. 激光与光电子学进展, 2014, 51(9): 093001. Li Wenbing, Liu Muhua, Huang Lin, Cheng Tianbing, He Xiuwen, Ouyang Jingyi, Yao Mingyin. Quantitative Analysis of Pb in Ipomoea Aquatica by Laser-Induced Breakdown Spectroscopy[J]. Laser & Optoelectronics Progress, 2014, 51(9): 093001.

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