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大量铜中铁的测定,国内外大部份都采用氨分离法、金属还原置换法、碘量法及使用特效指示剂的络合滴定法等。近年来,随着无汞盐测铁的迅速发展,以三氯化钛、硫酸亚钛为还原剂、于硫酸介质中测定大量铜中的铁也相继出现,它比上述方法简便、快速,但仍存在着适应性差的缺点,因为许多试料难以被盐酸、硝酸、硫酸所完全分解。近期,人们又提出了于硫
A large number of copper in the determination of iron, most of the domestic and foreign use of ammonia separation method, metal reduction displacement method, iodometric method and the use of special effects indicator complexometric titration. In recent years, with the rapid development of mercury-free salt measurement of iron, with titanium trichloride, titanium sulfate as a reductant, measured in a large amount of sulfuric acid medium copper also appeared in the iron, it is easier and faster than the above method, but There is still a disadvantage of poor adaptability because many samples are difficult to be completely decomposed by hydrochloric acid, nitric acid and sulfuric acid. Recently, people have proposed in the sulfur