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Simultaneous Kinetic Determination of Phosphate and Silicate by Spectrophotometric H‐Point Standard Addition Method
Author(s) -
Nekoei Mehdi,
Mohammadhosseini Majid,
Zarei Kobra
Publication year - 2008
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200800053
Subject(s) - chemistry , silicate , phosphate , molybdenum blue , ascorbic acid , molybdenum , inorganic chemistry , chelation , chromatography , organic chemistry , food science
The H‐point standard addition method (HPSAM), based on spectrophotometric measurements for simultaneous determination of phosphate and silicate, has been established. The method is based on the difference between their reactions rates with molybdenum in the presence of ascorbic acid. The results revealed that phosphate and silicate could be determined simultaneously with the concentration ratios of phosphate to silicate varying from 1:10 to 12:1 in the binary mixtures. The effects of chelating agent nature, time, interferents and experimental variables are also investigated. Under working conditions, the proposed method was successfully applied to the simultaneous determination of phosphate and silicate in synthetic detergents.