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本法采用铜为载体,以硫化物沉淀富集后进行光谱测定,从而避免使用特殊仪器设备和繁杂的化学处理就可以测定化探试样中痕量银。在0.3—1M盐酸介质中加0.8—2克硫化钠作为沉淀剂可获得满意的分离效果和回收率。银的试验空白<0.001微克/毫升,测定下限为1ppb。
This method uses copper as a carrier to conduct spectrometric determination after the sulfide is precipitated and enriched so as to avoid the trace silver in the geochemical exploration sample by using special instruments and complicated chemical treatment. In 0.3-1M hydrochloric acid medium plus 0.8-2 grams of sodium sulfide as a precipitating agent to obtain satisfactory separation and recovery. Silver test blank <0.001 microgram / ml, the lower limit of determination 1ppb.