在许多S~(35)标记化合物的合成中,元素硫是原料,通常S~(35)是以H_2S~(35)O_4的形式应用的,但其中每含有过量的盐酸,因此需要从硫酸盐的溶液中制备出高比放射性的元素硫。本文介绍了从硫酸盐制成元素硫的方法,包括如下两个步骤。 (一)由硫酸盐还原成硫化氢,将硫酸盐、氢碘酸、红磷和蚁酸的混合物在缓慢的氮气流中加热,释放出硫化氢,吸收在稀的氢氧化钠溶液中。 (二)由硫化物氧化成硫黄,将硫化物在硷溶液中用铁氰化钾和碳酸钾在苯存在下氧化, In the synthesis of many S ~ (35) labeled compounds, elemental sulfur is the raw material, usually S ~ (35) is used as H_2S ~ (35) O_4, but each contains an excessive amount of hydrochloric acid, Of the solution to prepare a high specific activity of elemental sulfur. This article describes the method of making elemental sulfur from sulphate, including the following two steps. (I) Reduction of sulfate to hydrogen sulfide, heating a mixture of sulfate, hydroiodide, red phosphorus and formic acid in a slow stream of nitrogen to release hydrogen sulphide and absorb it in dilute sodium hydroxide solution. (B) of the sulfide is oxidized to sulfur, the sulfide in alkaline solution with potassium ferricyanide and potassium carbonate oxidation in the presence of benzene,