本法选用二乙基二硫代甲酸银(简称铜试剂银盐或AgDDC的三氯甲烷溶液,内含0.1％马钱子硷),作为砷化氢的吸收剂,逸出的砷化氢还原铜试剂银盐,使银离子成单质胶态银而呈红色,最大吸收峰在530毫微米处。实验证明,加入马钱子硷后的铜试剂银盐溶液,至少可稳定十五天以上。本法测量范围在0～20微克。 This method uses silver diethyldithiocarbamate (referred to as the copper reagent silver salt or AgDDC in chloroform solution, containing 0.1% brucine), as arsine arsenide, the escape of arsine reduction Copper reagent silver salt, silver ions into single colloidal silver and red, the maximum absorption peak at 530 nm. Experiments show that after adding strychnine silver reagent silver salt solution, at least more than fifteen days stable. This method measures the range of 0 to 20 micrograms.