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自从 K.C.Thompsonc 等人报导用氢化物一原子吸收分光光度法测定砷、锑、铋、锡、硒、碲、铅、锗八元素以来,由于其灵敏度比常规火焰原子吸收法高几个数量级,因此在冶金、环保和地球化学找矿各个领域中愈来愈受到重视。本文介绍用氢化物一原子吸收分光光度法测定钨精矿中微量铋。试样经盐酸、硝酸分解后,保持5%的盐酸酸度,加入适量的酒石酸和硫脲抑制铜、铜、铁、镍、锑等元素的干扰。在酸性介质中铋与硼氢化钾反应
Since KCThompsonc et al. Reported the determination of arsenic, antimony, bismuth, tin, selenium, tellurium, lead and germanium in eight elements by hydride-atomic absorption spectrophotometry, their sensitivity is several orders of magnitude higher than that of conventional flame atomic absorption spectrometry In metallurgy, environmental protection and geochemical prospecting in various fields more and more attention. This article describes the determination of trace bismuth in tungsten concentrates by hydride-atomic absorption spectrophotometry. After the sample is decomposed by hydrochloric acid and nitric acid, the acidity of hydrochloric acid is maintained at 5%, and the tartaric acid and thiourea are added to restrain the interference of copper, copper, iron, nickel and antimony. Bismuth reacts with potassium borohydride in acidic medium