ISO 2590:1973
$12.35
General method for the determination of arsenic — Silver diethyldithiocarbamate photometric method
| Published By | Publication Date | Number of Pages |
| ISO | 1973-05 | 7 |
Applicable to determining the quantities contained either in all the test solution or in the aliquot portion of between 1 g and 20 g that is taken for the determination. The principle bases on the 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.
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