纳米TiO_2固相萃取石墨炉原子吸收法测定饮用水中的微量铊

Determination of Trace Thallium Content in Water with Graphite Furnace Atomic Absorption Spectrometry(GFAAS) through Nano-TiO_2 Solid-Phase Extraction on Process

建立一种以纳米TiO2固相萃取及胶体吸附与石墨炉原子吸收为基础的测定饮用水中痕量Tl含量的方法。加标回收率大于97%,检出限为0.009μg/L,相对标准偏差小于5%,抗干扰能力好,可用于饮用水分析。

Thallium ion could be absorbed by nano-TiO2 and ferric hydroxide colloidal core. With ferric hydroxide, it becomes a good method to determine trace amount of thallium in drinking water by solid-phase extraction （SPE） and graphite furnace atomic absorption spectrometry （GFAAS）. The detection limits of thallium by this method is 0.009 ug/L,the recovery rates is beyond 97 %, and the relative standard deviation（RSD） is less than 5 %.