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Effects of impurity ions on solubility and metastable zone width of phosphoric acid
Author(s) -
Ma Yong,
Zhu Jiawen,
Ren Hongrui,
Chen Kui
Publication year - 2009
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200900349
Subject(s) - solubility , phosphoric acid , impurity , chemistry , metastability , nucleation , ion , inorganic chemistry , analytical chemistry (journal) , chromatography , organic chemistry
Effects of two typical impurity ions as Fe 2+ and SO 4 2– in phosphoric acid on solubility and metastable zone width (MZW) had been studied. It was shown that polythermal method was suitable for solubility measurement in this study. The solubility experimental data was correlated with a polynomial equation. Being compared with Fe 2+ , SO 4 2– had a greater impact on the phosphoric acid solubility; and the variation in phosphoric acid MZW was just opposite. Phosphoric acid apparent secondary nucleation order was calculated to be 3.50 by means of modified regression method. And also the influence of impurity ions on apparent secondary nucleation order was investigated in this paper. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)