BS 4427-3:1969
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Methods of test for sodium tripolyphosphate ($7Ipenta$7Rsodium triphosphate) and sodium pyrophosphate ($7Itetra$7Rsodium pyrophosphate). Determination of iron content
Hardcopy
29-09-1989
English
28-02-1969
2,2′-Bipyridyl method applicable to sample, containing more than 0.001 per cent of iron.
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