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ISO 3357:1975

Current Revision

Sodium tripolyphosphate and sodium pyrophosphate for industrial use -- Determination of total phosphorus(V) oxide content -- Quinoline phosphomolybdate gravimetric method

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Based on hydrolysis of a test portion by prolonged boiling in the presence of hydrochloric acid. Precipitation of the phosphate ions in the form of quinoline phosphomolybdate in the presence of acetone. Filtration by means of a filter crucible, washing, drying and weighing of the precipitate.


SDO ISO: International Organization for Standardization
Document Number ISO 3357
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 47
Publish Date Document Id Type View
Not Available ISO 3357:1975 Revision