BS 4427-7:1974
Withdrawn
Date published:
Methods of test for sodium tripolyphosphate (pentasodium triphosphate) and sodium pyrophosphate (tetrasodium pyrophosphate) for industrial use, Estimation of tripolyphosphate (triphosphate) content of sodium tripolyphosphate
Gravimetric method using the tri(ethylenediamine) cobalt (II) chloride complex. Not applicable in the presence of metaphosphate but up to 6 per cent of pyrophosphate does not interfere.
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BS 4427-7:1974
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