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A Modified Procedure for the Determination of Phosphorus in Detergents


The procedure described by the American Society for Testing and Materials for the determination of phosphorus in detergents has been studied. It is concluded that, at 5% phosphorus as P2O5, the method as written does not give a true measure of the phosphorus level. A modified titrimetric procedure has been developed which overcomes the difficulties experienced in the ASTM procedure at low phosphorus levels.

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