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本文报道了以Au(Ⅲ)-Br~--藏红T(ST)离子缔合萃取-浮选光度法测定微量金(Ⅲ)。离子缔合物的最大吸收峰在520nm,其摩尔吸光系数ε_(520)=8.5×10~4(1·mole~(-1)·cm~(-1))。Au(Ⅲ)和ST的络合比为1:2,该离子缔合物的组成可能是〔Au Br_4~-·ST~+〕·〔Br~-·ST~+〕。本法已用于测定某些矿石,获得较满意的结果。
In this paper, the determination of trace gold (Ⅲ) by Au (Ⅲ) -Br ~ - tanzine T (ST) ion association extraction - flotation spectrophotometry was reported. The maximum absorption peak of ion association at 520nm, its molar absorption coefficient ε 520 (8.5 × 10 -4) (1 · mol -1 cm -1)). The complex ratio of Au (Ⅲ) to ST is 1: 2, and the composition of the ion complex may be [Au Br 4 ~ - · ST ~ +] · [Br ~ - · ST ~ +]. This method has been used to determine some of the ore to obtain more satisfactory results.