ISO 3000:1974 PDF
Sodium tripolyphosphate for industrial use — Estimation of tripolyphophate content — Tris(ethylenediamine) cobalt (III) chloride gravimetric method
Sodium tripolyphosphate for industrial use — Estimation of tripolyphophate content — Tris(ethylenediamine) cobalt (III) chloride gravimetric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 декабря 1974 г.
- Издание:
- ISO IS 3000 edition 1 version 1
- ICS:
- 71.060.50
Not applicable in the presence of metaphosphate. The presence of pyrophosphate at normal concentrations Ämaximum 6 % (m/m)Ü does not interfere. The principle consists in precipitation of tripolyphosphate as its complex with tris(ethylenediamine) cobalt(III) chloride at a pH of between 3 and 4 in a buffered medium. Filtration, washing, drying and weighing of the precipitate. Details the preparation of the reagent used for analysis. Has also been approved by the IUPAC.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 3000:1974