ISO 2465:1974

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

Published By	Publication Date	Number of Pages
ISO	1974-09	5

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Categories: 71.080.60 - Alcohols. Ethers, ISO

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Description

The method is applicable tp products with a content greater than 0,1 mg/kg. It is applied to a test portion as it is, and to another identical portion with a known quantity of arsenic added. The principle consists in reduction of the arsenic by zinc in a hydrochloric acid medium, 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.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1974-09
Pages Count	5
Language	English
Edition	1
File Size	276.5 KB
ICS Codes	71.080.60 - Alcohols. Ethers

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ISO 2465:1974

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