ISO 997:1976 PDF
Potassium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) complexometric method
Potassium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) complexometric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 мая 1976 г.
- Издание:
- ISO IS 997 edition 1 version 1
- ICS:
- 71.060.40
The method is applicable to products having a calcium content equal to or greater than 0.002 % (m/m). The principle consists in titration of the calcium with a standard volumetric solution of the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA disodium salt) in the presence of 2,2'-(ethylenedinitrilo)diphenol Äglyoxal-bis-(2-hydroxyanil)Ü as indicator, after elimination of impurities which may hinder the determination. - Replaces ISO Recommendation R 997-1969.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 997:1976
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