测定Cd、Pb,Cu的方法较多,采用溶剂萃取-火焰原子吸收法,能起到消除干扰和提高方法灵敏度等作用。河野隆年等人,曾在磷酸(3M)-碘化钾(0.2M)介质中用10毫升MIBK萃取Cd、Pb、Cu。当Cd的含量很低,直接采用上述方法时,需处理较多的样品,给溶样带来一定的困难。我们利用上述体系,但MIBK由10毫升改为1毫升,因此处理的样品即可减少10倍。由于采用微量进样技术,虽然仅为1毫升萃取剂亦可满足测定Cd、Pb、Cu的需要(每次进样只需几十微升)。我们固定水相体积为20毫升,有机相体积为1毫升进行了酸度范围,碘化钾用量等试验,同时也确定 Determination of Cd, Pb, Cu more methods, the use of solvent extraction - flame atomic absorption method, can play to eliminate interference and improve the sensitivity of the method and so on. Konno et al., In which 10 ml of MIBK was used to extract Cd, Pb and Cu in phosphate (3M) -kalium (0.2 M) media. When the Cd content is very low, direct use of the above method, the need to deal with more samples to the sample brought some difficulties. We use the above system, but MIBK from 10 ml to 1 ml, so the sample can be processed to reduce 10 times. Due to the micro-injection technique, only 1 ml of extractant is sufficient for the determination of Cd, Pb, Cu (only a few dozen microliters per injection). We fixed the aqueous phase volume of 20 ml, the organic phase volume of 1 ml for the acidity range, the amount of potassium iodide and other tests, but also to determine