ISO 1577:1987
Tea — Determination of acid-insoluble ash
Tea — Determination of acid-insoluble ash
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 2
- Дата публикации:
- 10 сентября 1987 г.
- Издание:
- ISO IS 1577 edition 2 version 1
- ICS:
- 67.140.10
The method consists in treating of the total ash (obtained as described in ISO 1575) with hydrochloric acid solution, filtrating, igniting and weighing of the residue.
Abstract
Overview
ISO 1577:1987 - Tea - Determination of acid‑insoluble ash specifies a laboratory method to quantify the fraction of tea ash that is insoluble in hydrochloric acid. The procedure starts from the total ash generated according to ISO 1575, treats that ash with HCl, filters, ignites and weighs the remaining residue. Results are reported as a percentage of the sample on a dry‑matter basis.
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