ISO 4275:1977 PDF
Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Название (английский):
ISO 4275:1977
Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 2
- Дата публикации:
- 1 ноября 1977 г.
- Издание:
- ISO IS 4275 edition 1 version 1
- ICS:
- 67.220.20
Описание (английский):
Applicable to products having As contents more than 0.2 mg/kg. The principle consists in reduction of the element to arsine in a solution of silver diethyldithiocarbamate in pyridine. Photometric measurement of the purplish- red colour produced by the colloidally dispersed silver, at the maximum of the absorption curve (wavelength approximately 540 nm).
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 4275:1977