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ISO 3357:1975

Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method ISO 3357:1975

Publication date:   Sep 1, 1975

General information

90.93 Standard confirmed   Nov 29, 2023

ISO

ISO/TC 47 Chemistry

International Standard

71.060.50   Salts

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Scope

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.

Life cycle

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PUBLISHED
ISO 3357:1975
90.93 Standard confirmed
Nov 29, 2023