一、序言近年來,硒的应用正不断擴大,硒在自然界中常和硫化物礦共存,黄鉄矿中常含有少量的硒。黄铁礦中硒的测定,苏联化学家等設計的方法,系用硝酸溶礦,在鹽酸溶液中用氫化亞錫把硒还原成元素狀态。为了避免夾带的雜質,因此用鹽酸和硝酸把它溶解,然后通入二氧化硫还原硒,烘干,称量。或者用容量法,加入 First, the preface In recent years, the application of selenium is expanding, often in the natural world of selenium and sulfide minerals coexist, often containing a small amount of seabuckthorn ore. Determination of selenium in pyrite, Soviet chemists and other design methods, the Department of nitric acid dissolved ore, hydrochloric acid solution with hydrogenated stannum to selenium reduced to the elemental state. In order to avoid entrained impurities, so hydrochloric acid and nitric acid to dissolve it, and then pass through the sulfur dioxide reduction selenium, drying, weighing. Or use volume method, add