ISO 2590:1973
ISO 2590:1973


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.

General information 

  •  :  Withdrawn
     : 1973-05
  •  : 1
     : 5
  •  : ISO/TC 47 Chemistry
  •  :
    71.040.40 Chemical analysis

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