標準號：ISO 2590-1973
中文標準名稱：測定砷的一般方法 二乙基二硫代氨基甲酸銀光度法
英文標準名稱：General method for the determination of arsenic; Silver diethyldithiocarbamate photometric method
標準類型：G04;N33
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G04;N33
國際標準分類號：71.060.10
適用范圍：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.