ISO 5515:1979
Fruits, vegetables and derived products — Decomposition of organic matter prior to analysis — Wet method
Fruits, vegetables and derived products — Decomposition of organic matter prior to analysis — Wet method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 1 февраля 1979 г.
- Издание:
- ISO IS 5515 edition 1 version 1
- ICS:
- 67.080.01
The method consists in heating a test portion until all organic matter is decomposed and a clear solution is obtained, either with sulphuric acid and nitric acid and in certain cases with hydrogen peroxide, or with sulphuric acid and nitric acid with the addition of perchloric acid.
Abstract
Overview
ISO 5515:1979 specifies a wet decomposition (acid digestion) method for the mineral analysis of fruits, vegetables and derived products. The standard describes heating a measured test portion until all organic matter is decomposed and a clear solution is obtained. Two wet routes are covered: digestion with (with hydrogen peroxide added in some cases), or digestion using sulfuric and nitric acids with the for more refractory samples. The procedure prepares samples for subsequent determination of minerals (ash-forming elements) by analytical techniques.
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