缝管原子捕集技术用于测定水中三价和五价锑

Determination of Antimony(Ⅲ)and Antimony(Ⅴ) in Water by Using Slotted Tube Atom Trapping Technique

本文研究了水样中的锑(Ⅲ)和锑(Ⅴ)在APDC—MIBK体系中的萃取行为,并用缝管原子捕集技术结合火焰原子吸收法测定了Sb(Ⅲ)和Sb(Ⅴ),测锑的特征浓度为2.9μg/L/1％吸收,检出限为2.0μg/L,富集倍数可达100倍。

The extraction behaviour of Sb (Ⅲ) and Sb (Ⅴ) in water samples with ammonium pyrrolidinedithiocarbamate-methyl isobutyl ketone has been investigated, and the Sb (Ⅲ) and Sb (Ⅴ) were determined with two-step extraction by slotted tube atom trapping technique and flame atomic absorption spectrometry. The characteristic concentration and detection limit of Sb are 2.9μg/L/1％ absorption and 2.0μg/L, respectively. The preconcentration factor of this method is 100.