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ISO 2465:1974

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

Sep 1, 1974
95.99   Withdrawal of Standard   May 27, 2002

General information

95.99     May 27, 2002

ISO

ISO/TC 47

International Standard

71.080.60  

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Scope

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.

Life cycle

NOW

WITHDRAWN
ISO 2465:1974
95.99 Withdrawal of Standard
May 27, 2002

National adoptions

SRPS ISO 2465:1992  
ISS

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

95.99   Withdrawal of Standard

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