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银和银合金中钯的火焰原子吸收光谱测定已有文献报道,都是以AgCl沉淀分离除去大量银,然后在水相或有机相中测定钯,由于有AgCl沉淀,需过滤、洗涤等手续,操作费时,特别对钯含量低的样品,取样量多达10克,由于AgCl沉淀吸附钯,使钯的回收率降低.如果能用选择性萃取剂将微量钯从硝酸溶液中分离出来并在有机相中进行测定,无疑可提高测定准确度。
Flame Atomic Absorption Spectrometry of Palladium in Silver and Silver Alloys It has been reported in the literature that a large amount of silver is separated and removed by AgCl precipitation and then palladium is measured in an aqueous phase or an organic phase. Due to precipitation with AgCl, filtration and washing, The operation is time-consuming, especially for samples with low palladium content, up to 10 g of sample volume, which results in reduced palladium recovery due to adsorption of palladium by AgCl precipitation.If a selective extractant can be used to separate trace amounts of palladium from nitric acid solution, Phase determination, no doubt can improve the measurement accuracy.