石墨炉原子吸收法测定饮用水中铊的探讨

摘要

研究了石墨炉原子吸收测定饮用水中铊的测定条件，为提高水样预处理的浓缩效果，对水样共沉淀条件进行详细探讨，结果表明：溴水用量2mL，pH控制在7～9，陈化时间大于32h时水样预处理效果最好，方法检出限为0．01μg/L，实际水样平均回收率90．5％～103％。%The method of determining Thallium in drinking water by Graphite Furnace Atomic Absorption Spectrometry （GFAAS） is described in this paper. The precipitation conditions in water samples are discussed in detail to improve the concentration effect of the water sample pretreatment. The best water sample pretreatment effect was obtained when the amount of bromine water was 2 mL, pH was controlled at7 to 9 and the aging time was longer than 32 h. The detection limit is 0. 01 ug/L. The average recovery rate of actual water were between 90. 5% -103%.