8Kundu D. and Roy S. K. ,De - Masking Of magnesium - Acetylacetonate Complex for Direct EDTA Titration of Calcium and Magnesium in the Same Solution and at the Same pH,[J]. Analyst,1993,118(7) :905.
9Prasad K. M. ,et el. Evaluation of Colonr Changes of Indicators in the Titration of Cadmium with EDTA[ J]. Anal.Chim. Acta, 1992,264( 1 ) :137.
10Ghosh K. C. , et al. A Rapid Complexometric Scheme for Analysis of Iron Alminium Calcium and Magnesium in Slags[J]. Talanta, 1992,39(6) :675.
