ISO 1577:1987 PDF
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 , 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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