BS 4427-8:1974
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use Determination of orthophosphate content
Hardcopy , PDF
29-02-1992
English
07-06-1974
Photometric method using the reduced molybdophosphoric complex. Applicable to materials with orthophosphate contents, expressed as P2O5, between 0.05 per cent and 1.0 per cent.
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