本文提出了泡沫塑料吸附解脱新体系,建立了泡沫塑料吸附-溶出计时电位法测定地质物料中痕量铊的新方法.方法检出限 0.03 μg/g:铊的含量水平分别为 0.71μ g/g和 1.6μg/g时的测定精密度为 3.45%和 3.28%;工作曲线线性范围为 5~1500 ng/mL;回收率为97.5%~98.0%. In this paper, a new system for the adsorption and desorption of foamed plastic was proposed, and a new method for the determination of trace thallium in geological materials by adsorption-stripping chronopotentiometry was established.METHODS The detection limit was 0.03 μg / g: the content of thallium was 0.71 μg / The precision of determination was 3.45% and 3.28% at g and 1.6μg / g, the linear range of working curve was 5 ~ 1500 ng / mL and the recoveries were 97.5% -98.0%.