ISO 3359:1975 PDF
Phosphoric acid for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Phosphoric acid for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 2
- Дата публикации:
- 1 августа 1975 г.
- Издание:
- ISO IS 3359 edition 1 version 1
- ICS:
- 71.060.30
Applicable to products having As contents of more than 0.1 mg/kg. Relates to the method of analysis according to ISO 2590. Reduction of the As by zinc in a hydrochloric acid solution with the formation of arsine. Absorption of the 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 at a wavelength of about 540 nm. Determination of the quantity of As by means of the calibration curve.
Технические детали
- Технический комитет
- ISO/TC 47 - Chemistry
- SKU
- ISO 3359:1975