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金属铋中碲的测定,原部颁方法是二氯化锡还原法,此法不用分离铋,操作简便、快速,但灵敏度低且受银等的影响。测定微量碲的方法已报道的有铋试剂Ⅱ、丁基罗丹明B、胜利兰4R(维脱利亚兰)、高铁—菲罗林等。用上述方法测定铋中微量碲,必须预先分离碲。微量碲的分离可用甲基异丁酮、磷酸三丁酯、硝基苯、高分子胺等萃取法。最近,铃木介绍了从大于3N的盐酸溶液中,用三正辛胺萃取毫克量的碲(Ⅳ),但对微克量碲的萃取情况没有提及。我们对三正辛胺从盐酸溶液中萃取铋中微量碲及在反萃取液中用高铁—菲罗林试剂测定碲的条件进行了
Determination of tellurium in bismuth, the original method is issued by the Department of tin dichloride reduction method, this method does not separate bismuth, easy to operate, fast, but low sensitivity and the impact of silver. Methods for the determination of trace tellurium have been reported with bismuth reagent Ⅱ, butyl rhodamine B, Victory Blue 4R (Vitaland), high-speed rail - Philippines Luo Lin and so on. With the above method for the determination of trace amounts of tellurium in bismuth, it is necessary to separate tellurium. Trace separation of tellurium available methyl isobutyl ketone, tributyl phosphate, nitrobenzene, high molecular weight amine extraction. Recently, Suzuki introduced the extraction of milligram quantities of tellurium (IV) from a solution of hydrochloric acid greater than 3N using tri-n-octylamine, but no mention was made of the extraction of micrograms of tellurium. We carried out the extraction of trace amounts of tellurium in bismuth from hydrochloric acid solution by tri-n-octylamine and the determination of tellurium in the stripping solution by using high-iron-phenanthrene reagent