物理学报Issue(14)：1-5,5.DOI:10.7498/aps.63.145202
基于激光诱导击穿光谱技术定量分析食用明胶中的铬元素
Quantitative analysis of chromium in edible gelatin by using laser-induced breakdown sp ectroscopy
摘要
Abstract
We quantitatively analyze the concentration of element chromium in edible gelatin sample by the laser-induced breakdown spectroscopy. As the excitation source, Nd:YAG pulsed laser (wavelength 355 nm) is used to generate a laser plasma in edible gelatin. We study the relationship between spectral intensity and delay time, and find that the optimal condition is 1.7 µs. The experimental data show that the relation between the spectral line intensity (CrI:425.43 nm) and the concentration of chromium is linear when we use the internal standard method to quantitatively analyze the concentration of chromium in a range from 10 ppm to 200 ppm. This study shows that internal standard method of quantitative analysis works well on measuring the chromium concentration in edible gelatin.关键词
激光诱导击穿光谱/定量分析/定标曲线/铬Key words
laser-induced breakdown spectroscopy/quantitative analysis/calibration curve/chromium引用本文复制引用
张颖,张大成,马新文,潘冬,赵冬梅..基于激光诱导击穿光谱技术定量分析食用明胶中的铬元素[J].物理学报,2014,(14):1-5,5.基金项目
中国科学院仪器功能开发项目(批准号：YG2012080)资助的课题 （批准号：YG2012080）
