COMPLEXOMETRIC DETERMINATION OF CALCIUM AND MAGNESIUM IN DOLOMITE, LIMESTONE, MAGNESITE, PHOSPHATE AND SILICATE MATRICES USING AZOCHROMOTROPIC ACID-DERIVATIVE AS AN INDICATOR

Authors
RATHORE DPS KUMAR M BHARGAVA PK
Citation
Dps. Rathore et al., COMPLEXOMETRIC DETERMINATION OF CALCIUM AND MAGNESIUM IN DOLOMITE, LIMESTONE, MAGNESITE, PHOSPHATE AND SILICATE MATRICES USING AZOCHROMOTROPIC ACID-DERIVATIVE AS AN INDICATOR, Chemia Analityczna, 42(5), 1997, pp. 725-728
Citations number
7
Categorie Soggetti
Chemistry Analytical
Journal title
Chemia Analityczna → ACNP
ISSN journal
00092223
Volume
42
Issue
5
Year of publication
1997
Pages
725 - 728
Database
ISI
SICI code
0009-2223(1997)42:5<725:CDOCAM>2.0.ZU;2-Z
Abstract
A simple complexometric method has been developed for the determinatio n of calcium directly at pH 12-13 and magnesium from the difference in the titre values for total calcium and magnesium at pH about 10. The method is free from most metal interferences. The method has been appl ied to dolomites, limestone, magnesite, phosphate and silicate matrice s and the results obtained compare favourably with those from the repo rted values.