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本文合成了新有机试剂4-(6-溴-2-苯并噻唑偶氮)焦棓酚(6-Br-BTAPG),并研究它与钼(Ⅵ)形成配合物的性能。在pH 3.20时,在CTMAB存在下,新有机试剂6-Br-BTAPG与钼(Ⅵ)形成稳定的、2:1紫红色配合物,其λ_(max)为585nm,ε_(585)为5.76×10~4L·mol~(-1)·cm~(-1)。该方法已用于钢铁等样品中微量钼的测定取得了满意结果。
In this paper, a new organic reagent 4- (6-bromo-2-benzothiazolylazo) pyrogallol (6-Br-BTAPG) was synthesized and its properties as a complex with molybdenum (Ⅵ) were studied. The novel organic reagent 6-Br-BTAPG forms a stable 2: 1 fuchsine complex with molybdenum (Ⅵ) at pH 3.20 in the presence of CTMAB with λ max of 585 nm and ε 585 of 5.76 × 10 ~ 4L · mol ~ (-1) · cm ~ (-1). The method has been applied to the determination of trace molybdenum in steel and other samples with satisfactory results.