ISO-5378 › Starches and derived products -- Determination of nitrogen content by the Kjeldahl method -- Spectrophotometric method

ISO-5378 - 1ST EDITION - CURRENT


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Destruction of organic matter by sulphuric acid in the presence of a compound catalyst (see ISO 1871), alkalization of the reaction products, destillation of the liberated ammonia and collection in a sulphuric acid solution, followed by measuring of the ammonium salt formed after the addition of Nessler reagent. The method is provided for contents less than 0,025 % (m/m). For greater contents, see ISO 3188.

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67.180.20 (Starch and derived products Including glucose syrups, etc.)

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Document Number

ISO 5378:1978

Revision Level

1ST EDITION

Status

Current

Publication Date

June 15, 1978

Committee Number

ISO TC 93