基于滤纸富集技术的LIBS污水检测

Laser-induced Breakdown Spectroscopy for Determination of Metals in Solution with Filter Paper

将滤纸作为基底用于LIBS测定水溶液中的金属元素,分析了不同的滤纸浸泡时间对LIBS信号的影响,以及在不同质量浓度的情况下,分析浸泡时间与信号的关系。以实验室配置的不同浓度的偏砷酸钠溶液为研究对象,对浸泡时间为10s和60s的As元素和Na元素做了探测分析并得到了其定标曲线,初步确定了在As元素和Na元素在不同时间下的检测限分别为:As元素0.379g/L(10s)、0.224g/L(60s);Na元素0.021g/L(10s)、0.018g/L(60s)。实验所得的结果为探测工业废水中金属元素的含量提供依据。

This paper reports studies on the determination of metal elements in solution with filter paper, the effects of soaking time to LIBS was analyzed with both same and different mass concentrations. The study object was prepared soIutions of NaAsOz with different mass concentrations, the As element and Na element were determined and analyzed in the soaking time of 10 seconds and 60 seconds, the calibration curves were obtained. The detection limits of As element and Na element were preliminarily determined in the different time： 0. 379g 7 L （As 10 sec）, 0. 224g / L （As 60 sec） ; 0. 021g / L （Na 10 sec）, 0. 018g / L （Na 60 sec）. Experimental results provide the basis for the detection of metals in industrial waste water.