ISO 2865:1973
Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method
Название (английский):
ISO 2865:1973
Aluminium oxide primarily used for the production of aluminium — Determination of boron content — Curcumin spectrophotometric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 1 декабря 1973 г.
- Издание:
- ISO IS 2865 edition 1 version 1
- ICS:
- 71.100.10
Тип поставки:
Язык документа:
Срок поставки:1 раб. дн. (перевод)
Цена:9 000 ₽
Описание (английский):
Applicable to products having boron oxide contents of more than 0.0006 % (m/m). With sufficiently sensitive apparatus, the lower limit of application may be extended to 0.00008 % (m/m). The test portion is dissolved in phosphoric acid. Separation of the boron by distillation as methyl borate. Formation of a red coloured complex between the boron and the curcumin reagent at pH 7. Spectrophotometric measurement of the complex at a wavelength of about 550 nm.
Abstract
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