ISO 6638-1:1985
Fruit and vegetable products — Determination of formic acid content — Part 1: Gravimetric method
Fruit and vegetable products — Determination of formic acid content — Part 1: Gravimetric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 21 ноября 1985 г.
- Издание:
- ISO IS 6638 edition 1 version 1
- ICS:
- 67.080.01
The method consists in quantitative entraining by steam of the acid present in a test portion and reducing of mercury(II)chloride by the acid to mercury(I)chloride, followed by determing of the acid content from the yield of the mercury(I)chloride.
Abstract
Overview
specifies a gravimetric laboratory method for the determination of . The procedure uses steam entrainment (distillation) to transfer formic acid from a test portion, chemically reduces mercury(II) chloride with the formic acid to produce mercury(I) chloride (Hg2Cl2), and quantifies formic acid from the mass of precipitated mercury(I) chloride. Part 2 of describes an alternative titrimetric method.
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