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

Standard No.

ISO 3946:1982

Release Date

1982

Published By

International Organization for Standardization (ISO)

Latest

ISO 3946:1982

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).

ISO 3946:1982 history

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