激光热透镜效应法测定痕量高氯酸根

Determination of Trace Amounts of Perchlorate Ion by using Laser Thermal Lens Effect

本文用30毫瓦氦氖激光器,以苯萃取高氯酸根与灿烂绿生成的离子缔合物,利用激光热透镜效应法测定了痕量高氯酸根,实验了影响测定的各种因素。高氯酸根的最低检出限为0.2ppb。方法用于氯酸钾中高氯酸根的测定。

The perchlorate-brilliant green complex can be extracted by benzene from aqueous solution and applied to determination of trace amounts of perchlorate by means of its laser-induced thermal lens effect. By using 30 mw HeNe laser (wavelength 632.8 nm) and in a 2-cm sample cell, its detectable limit and linear range of perchlorate were 0.2 ppb and 0.2—10 ppb. respectively.