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文献[见Ж、A、X.,37(3),429(1982)]曾研究了4,5—二溴萤光酮在表面活性物质存在下与锡生成的三元络合物,其最大吸收在540nm,摩尔吸光系数ε_(540)=1.5×10~5.本文在其工作的基础上,通过试验,寻找该体系用于测定铜合金中微量锡的条件.试验结果表明:在25ml容量瓶中,显色酸度为1～5ml4N硫酸;显色剂用量为0.5～1.5ml0.05%二溴萤光酮的乙醇溶液;表面活性剂用量为2～5ml0.4%CTMAB(十六烷基三甲基溴化铵);催化剂用量为0.1～2.0ml1%草酸.室温下瞬间显色完全并稳定20分钟不变.O～18μg
The literature [see Ж, A, X., 37 (3), 429 (1982)] studied ternary complexes of 4,5-dibromofluorone with tin in the presence of surface-active substances, the largest of which Absorption at 540nm, the molar extinction coefficient ε 540 (540) = 1.5 × 10 5 In this paper, based on the work, through the test to find the system for the determination of trace tin in copper alloy conditions test results show that: 25ml capacity Bottle, the color of the acidity of 1 ~ 5ml4N sulfuric acid; the amount of color reagent 0.5 ~ 1.5ml0.05% dibromofluorone ethanol solution; the amount of surfactant is 2 ~ 5ml0.4% CTMAB (cetyl Trimethylammonium bromide); the amount of catalyst is 0.1 ~ 2.0ml1% oxalic acid at room temperature instantaneous color completely and stable for 20 minutes unchanged.O ~ 18μg