separately by using di-calcium phosphate (DCP), tri-calcium phosphate (TCP) and zinc phosphate (ZP) as source of insoluble inorganic phosphate along with bromophenol blue as pH indicator
separately by using di-calcium phosphate (DCP), tri-calciumphosphate (TCP) and zinc phosphate (ZP) as source of insolubleinorganic phosphate along with bromophenol blue as pH indicator