ISO 6778:1984
Water quality — Determination of ammonium — Potentiometric method
Water quality — Determination of ammonium — Potentiometric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 1 мая 1984 г.
- Издание:
- ISO IS 6778 edition 1 version 1
- ICS:
- 13.060.50
Specifies a procedure using an ammonia-sensing membrane probe for raw and waste water and sewage. The procedure is applicable to ammonium nitrogen concentration of up to 50 mg/l.The limit of detection is defined as the limit of Nernstian response under the conditions specified and has a value corresponding to approximately 0,2 mg/l.
Abstract
Overview
ISO 6778:1984 specifies a potentiometric method for the determination of ammonium in raw water, sewage and wastewater using an ammonia‑sensing membrane probe (ammonia ion‑selective electrode). The procedure covers routine laboratory measurement up to (as ammonium nitrogen) without dilution and defines the limit of detection as the Nernstian response limit - approximately under the prescribed conditions. The method converts ammonium to ammonia by alkaline treatment and measures the electrode potential according to the Nernst equation.
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