激光热透镜效应及其在痕量物质测定中的应用

激光热透镜效应及其在痕量物质测定中的应用 LASER THERMAI LENS EFFECT AND APPLICATION TO TRACE SOLUTES DETERMINATIONS 邓延倬 Deng Yanzhuo Sheng Rongsheng Wang Mingsheng first-author 盛蓉生 王明胜 本文用He—Ne激光器（λ=632.8nm）观察了乙酰丙酮铜在几种有机溶剂中的激光热透镜效应,研究了影响热透镜效应的几个因素。以Co（Ⅲ）—PAN的测定为例,介绍了激光热透镜效应在痕量物质测定上的应用。使用1.2mW的He—Ne激光和5cm池,得到Co的最低可测浓度为12ppb,相应于束体积中0.06ng的Co。与用PAN作Co的常规吸光分析相比,测定灵敏度有显著的提高。 The laser thermal lens effect of Cu（AA） 2 in several organic solvents was observed with a He-Ne laser（λ=632.8nm）. Some factors influecing the effect were studied. To illustrate the application of this effect to trace solutes determinations, the experimental detection of trace Co with PAN is presented. Using a 1.2mW He-Ne laser and a 5cm-cell, a minium detectable concentration 12ppb Co, corresponding to0.06ng Co in in-beam volume, is achieved, Compared with the conventional spectrophotometric analysis of Co with PAN, the sensitivity of this method is considerably increased. 1980-04-01 2021-04-01 4