ISO 3359:1975

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Phosphoric acid for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method

Published By	Publication Date	Number of Pages
ISO	1975-08	5

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Categories: 71.060.30 - Acids, ISO

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Description

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.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1975-08
Pages Count	5
Language	English
Edition	1
File Size	215.0 KB
ICS Codes	71.060.30 - Acids

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ISO 3359:1975

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