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研究了在十六炕基三甲基铵溴化物(CTAB)存在与不存在时,钼与7,8-二羟基-4-甲基氧杂萘邻酮(DHMC)形成的1:2络合物。当CTAB不存在时,在pH5.6～6.0范围内生成的二元络合物在360nm处显示出最大吸收率,其摩尔吸收率为5.1×10~4l·mole~(-1)·cm~(-1)。当CTAB存在时,在pH4.8～6.0范围内生成的络合物,在最大吸收波长400nm处摩尔吸收率为1.32×10~5l·mole~(-1)·cm~(-1)。研究了生成络合物的最佳条件,并介绍了一种测定含钼约70％以下的各种合金和钢中钼的快速、灵敏和选择性颇好的方法。少量锆和钨会发生干扰。
The 1: 2 complex formation of molybdenum with 7,8-dihydroxy-4-methyloxynaphthalenone (DHMC) was studied in the presence and absence of cetyltrimethylammonium bromide (CTAB) Things. In the absence of CTAB, the binary complex formed in the pH range of 5.6-6.0 showed the highest absorbance at 360 nm with a molar absorptivity of 5.1 × 10 -4 l · mol -1 · cm -1. (-1). In the presence of CTAB, the complex formed in the pH range of 4.8 ~ 6.0 has a molar absorptivity of 1.32 × 10 ~ 5l · mol ~ (-1) · cm ~ (-1) at the maximum absorption wavelength of 400 nm. The optimum conditions for the formation of the complex were investigated and a rapid, sensitive and well-defined method for the determination of molybdenum in various alloys containing about 70% molybdenum and molybdenum was presented. Small amounts of zirconium and tungsten interfere.