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地球化学找矿需要测定ppb级的银。常用的比色法,火焰原子吸收法的灵敏度均难满足要求。文献报导用石墨炉原子吸收法测定银,但由于基体影响大,复杂样品中痕量银须分离富集后进行测定。有人用开孔聚氨基甲酸酯泡沫塑料做载体,双硫腙为固定相,可将1微克/升的银定量富集。文献报导以三正辛胺(TOA)做络合剂,液—液萃取原子吸收法测定银。 综合上述文献报导,试验了以聚醚型软
Geochemical prospecting requires ppb level silver determination. Commonly used colorimetric method, flame atomic absorption spectrometry are difficult to meet the requirements of the sensitivity. Reported by graphite furnace atomic absorption method for the determination of silver, but because of the matrix of large, complex samples of silver must be separated after enrichment and determination. Some people use open-cell polyurethane foam carrier, dithizone as the stationary phase, can be 1 microgram / liter of silver quantitative enrichment. Reported in the literature to tri-n-octylamine (TOA) as a complexing agent, liquid-liquid extraction atomic absorption spectrometry for the determination of silver. Based on the above literature, polyether type softness was tested