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资料介绍了用4.4＇—双(二甲胺)二苯甲硫酮(TMK)在水溶液中比色测定金,但实验条件不完善且稳定时间较短,有人用乙醇作稳定剂和增色剂,但其用量较大.我们经过实验,提出在醋酸—醋酸钠缓冲液(PH3.3～3.4)中并在TritonX—100非离子表面活性剂存在下,用TMK测定矿物岩石中微量金.摩尔吸光系数为1.5×10~5升·摩尔~(-1)·厘米~(-1).不经分离可允许1000微克的铅、锌、铝、钙、镁、锶、钡,500微克的铜、镍、镉、锡、硒、碲,400微克的锰、钛、砷、钼,200微克的钴、锑、锗
The data describes the colorimetric determination of gold with 4,4’-bis (dimethylamine) benzthiophenone (TMK) in aqueous solution, but the experimental conditions are not perfect and the stabilization time is short. Some people use ethanol as stabilizer and toner, But its dosage is larger.We have experimentally proposed that the determination of trace gold in mineral rock by TMK in the presence of TritonX-100 non-ionic surfactant in acetic acid-sodium acetate buffer (pH 3.3 ~ 3.4) The coefficient is 1.5 × 10-5 liters · mol -1 · cm -1 · 1000 μg of lead, zinc, aluminum, calcium, magnesium, strontium, barium, 500 μg copper, Nickel, cadmium, tin, selenium, tellurium, 400 micrograms of manganese, titanium, arsenic, molybdenum, 200 micrograms of cobalt, antimony, germanium