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二硫代安替比林甲烷(DTPM)首先是由等提出作为铋的显色剂,随后又相继报导了此试剂在高酸度下也能与砷、金、钼、锑、铅、锡、碲等十多种元素形成稳定的络合物,还可用于这些元素的光度测定。故DTPM是一种很有价值的有机显色剂。本文在文献[3]、[4]的基础上进一步研究了DTPM的合成和提纯,提出了用盐酸代替乙醇的新的纯化方法,这种提纯方法不仅可以节省大量乙醇,且手续简便,得率较高。纯品经元素分析、有效成分比较、对砷的灵敏度以及与砷的络合比等的测试,结果都较好。 DTPM为白色晶体。它在水和冷乙醇中的溶解度较小,但可溶于氯仿、N,N-二甲基甲酰胺(DMF)和热乙醇中(见表1),也可溶于浓的无机酸和乙酸,不过时间稍长即分
DTPA was firstly proposed as a chromogenic reagent of bismuth and subsequently reported successively that it can react with arsenic, gold, molybdenum, antimony, lead, tin, tellurium More than 10 kinds of elements such as the formation of a stable complex can also be used for photometry of these elements. Therefore, DTPM is a very valuable organic developer. Based on the references [3] and [4], this paper further studies the synthesis and purification of DTPM, and proposes a new purification method using hydrochloric acid instead of ethanol. This purification method can not only save a lot of ethanol, Higher. Pure elements by elemental analysis, the active ingredient comparison, the sensitivity of arsenic and the complex ratio with arsenic test, the results are better. DTPM is white crystal. It is less soluble in water and cold ethanol but is soluble in chloroform, N, N-dimethylformamide (DMF) and hot ethanol (see Table 1) and also in concentrated mineral acids and acetic acid , But a little longer that points