基于滤纸富集法提高LIBS检测水体Cu灵敏度的研究  

Improving Detection Sensitivity of Cu in Sewage by Laser Induced Breakdown Spectroscopy Using Filter Paper Enrichment

作　　者：郑美兰[1] 姚明印[1] 何秀文[1] 欧阳静怡[1] 林永增[1] 黎文兵[1] 刘木华[1] 

机构地区：[1]江西农业大学生物光电及应用实验室,江西南昌330045

出　　处：《激光与光电子学进展》2013年第7期161-166,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(31271612);江西省教育厅科技计划(GJJ12249);江西省学术带头人计划(09004004)

摘　　要：为提高激光诱导击穿光谱(LIBS)检测水体中铜元素(Cu)的检测灵敏度。采用实验室配置的不同质量浓度硫酸铜溶液分别用直接打击液面方式和滤纸富集方式对水溶液中的Cu进行LIBS实验,优化实验参数,比较不同方法下的检测结果。结果显示,应用LIBS检测水体中Cu最佳分析谱线为324.7nm;最佳延迟时间为1400ns;最优激光能量值为100mJ。对两种方法下Cu元素的定标曲线进行线性拟合,其线性相关系数分别为0.97047和0.99901,检测限分别为74μg/mL和1.5μg/mL。结果表明采用滤纸富集的方法可以明显提高LIBS检测水体中铜元素的灵敏度,降低检测限。In order to improve detection sensitivity of Cu element in sewage by laser induced breakdown spectroscopy （LIBS）. The LIBS test in aqueous solution of cuprum are conducted with a direct blow to the liquid level and the filter paper enriched method, experimental parameters are optimized and results of different methods are discussed. The results show that the best analyzing spectral lines of Cu is 324.7 nm; the optimal delay time is 1400 ns; the optimal pulse laser energy is 100 mJ. Getting the calibration curve of two methods, the correlation coefficients are 0. 97047 and 0. 99901. The limit of detection are 74μg/mL and 1.5 μg/mL respectively. The results show that filter paper enrichment method works better. This study indicates that filter paper enriching method can improve the sensitivity of detection and reduce the limit of detection.

关 键 词：光谱学 激光诱导击穿光谱 铜 滤纸富集 检测灵敏度 

分 类 号：TN249[电子电信—物理电子学]