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Homepage>ISO Standards>ISO 3357:1975-Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method
download between 0-24 hoursReleased: 1975
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

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

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Standard´s number:ISO 3357:1975
Pages:3
Edition:1
Released:1975
DESCRIPTION

ISO 3357:1975


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.
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