CAJ | 학술논문

以激光诱导击穿光谱技术实时检测水中的重金属镉元素为研究目的，对不同浓度的含镉水溶液进行激光诱导击穿光谱试验。确定在以361．05 nm为镉元素特征分析谱线时，较佳采集延迟时间为1680 ns，较佳的激光能量值为110 mJ。采用线性拟合的方法对镉元素进行定量分析，拟合曲线的线性相关系数为0．99538，两验证样品的相对误差分别为9．21％、8．50％。研究表明激光诱导击穿光谱技术对水中镉元素进行实时、在线检测是可行的，但检测灵敏度还有待进一步提高。
이격광유도격천광보기술실시검측수중적중금속력원소위연구목적，대불동농도적함력수용액진행격광유도격천광보시험。학정재이361．05 nm위력원소특정분석보선시，교가채집연지시간위1680 ns，교가적격광능량치위110 mJ。채용선성의합적방법대력원소진행정량분석，의합곡선적선성상관계수위0．99538，량험증양품적상대오차분별위9．21％、8．50％。연구표명격광유도격천광보기술대수중력원소진행실시、재선검측시가행적，단검측령민도환유대진일보제고。
The research purpose is to detect the heavy metal Cd in sewage by using laser?induced break?down spectroscopy(LIBS).The test was conducted with different concentrations of Cd chloride in water by laser induced breakdown spectroscopy.361.05 nm line was selected as the characteristic spectral line of Cd.The opti?mal delay time was 1 280 ns,the best pulse laser energy was 110 mJ.The quantitative analysis of Cd was car?ried out by linear fitting.The linear correlation coefficient of fitting curve was 0.995 38,the relative errors of two validated samples were 9.21%,8.50% respectively.The results show that LIBS technique for real?time,on?line quantitative analysis of heavy metals in water is feasible.However,the sensitivity of detection needs further improvement.