ISO 2465:1974
Glycerols for industrial use — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Reference number
ISO 2465:1974
Edición 1
1974-09
Retirada
ISO 2465:1974
7380
Retirada (Edición 1, 1974)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1974-09
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 3
  • ISO/TC 47
    71.080.60 
  • RSS actualizaciones

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)