【摘要】 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,ε₅₈₅为5.76×10⁴L·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。更多还原

【Abstract】 A new organic chromogenic reagent, 4-（6-br（?）mo-2-benzothiazolylazo） pyrogallol, was synthesized by the coupling reaction of brominated and diazotized 2-aminobenzothiazole with pyrogallol, and it is purified by recrystallization from DMF solution. This new reagent, abbreviated as 6-Br-BTAPG, reacts with Mo （Ⅵ） in a slightly acidic medium of pH 3.20 in the presence of CTMAB, forming a stable violet red complex with molar ratio of 2 to 1. Its maximum absorption lies at 585nm and its molar absorptivity is 5.76×10⁴ L·mol^-1 ·cm^-1. The optimum reaction condition was established and applied to the determination of molybdenum in low alloy steels.更多还原