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ISO 3946:1982

Starches and derived products — Determination of total phosphorus content — Spectrophotometric method ISO 3946:1982

Publication date:   Dec 1, 1982

General information

90.60 Close of review   Dec 3, 2024

ISO

ISO/TC 93 Starch (including derivatives and by-products)

International Standard

67.180.20   Starch and derived products

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Scope

Destruction of the organic substances by digestion with a sulpho-nitric mixture and conversion of phosphates to orthophosphates. Formation of a phosphomolybdate. Measurement of the intensity of the blue colour at a wavelength of 825 nm. The method applies to contents up to 5 % (m/m).

Life cycle

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PUBLISHED
ISO 3946:1982
90.60 Close of review
Dec 3, 2024