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THE DETERMINATION OF ZINC IN REFRACTORY BODIES AND SLAGS 1
Author(s) -
Marbaker Edward E.
Publication year - 1931
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1931.tb16924.x
Subject(s) - zinc , ammonia , chemistry , inorganic chemistry , ammonium chloride , precipitation , refractory (planetary science) , gravimetric analysis , citric acid , metallurgy , chloride , nuclear chemistry , materials science , organic chemistry , physics , meteorology
An earlier published method for the determination of zinc in discarded retorts and other refractory bodies was found to be accurate but too tedious for commercial work. An effort was made to develop a shorter method. It was found that the ordinary ammonia‐ammonium chloride separation of iron from zinc is not accurate in the presence of relatively large amounts of alumina. A rapid method involving the separation of zinc from iron and alumina under conditions involved in the analysis of refractory bodies was developed. The method consists in precipitating iron and zinc sulphides from an ammoniacal solution containing the three ions, in which the alumina is held in solution by the presence of citric acid, Methods for the determination of zinc are discussed and reasons given for the adoption of the gravimetric method involving the precipitation of zinc sulphide from a faintly acid solution.