ISO-3706 › Phosphoric acid for industrial use (including foodstuffs) -- Determination of total phosphorus(V) oxide content -- Quinoline phosphomolybdate gravimetric method

ISO-3706 - 1ST EDITION - CURRENT


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Applicable to products whether or not they are homogeneous and whether or not they contain polyphosphoric acids. Specifies preliminary hydrolysis of the polyphosphoric acids by boiling in the presence of hydrochloric acid. The precipitation of the phosphoric acid is carried out in the form of quinoline phosphomolybdate in the presence of acetone. Filtration by a filter crucible, washing, drying and weighing of the precipitate.

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Document Number

ISO 3706:1976

Revision Level

1ST EDITION

Status

Current

Publication Date

Nov. 15, 1976

Committee Number

ISO TC 47