Kandhro Ghulam A, Soylak Mustafa, Kazi Tasneem Gul, Yilmaz Erkan
J AOAC Int. 2014 Jan-Feb;97(1):205-10. doi: 10.5740/jaoacint.12-114.
A rapid, simple, selective, economical, and sensitive dispersive liquid-liquid microextraction methodology has been established for the preconcentration of copper (Cu) at trace levels. The Cu(II) was complexed with 1-(2-pyridylazo)-2-naphthol; ethanol and carbon tetrachloride were used as disperser and extraction solvents, respectively. To obtain quantitative recovery of Cu(II), the effects of parameters influencing its extraction efficiency and subsequent determinations, i.e., pH, amount of complexing reagent, extraction time, and type and volume of disperser and extraction solvents, were examined. LOD and LOQ were 0.06 and 0.20 microg/L, respectively. The enrichment factor of the proposed method was 60, and the RSD <5%. TMDA 51.3 and TMDA 70 fortified water certified reference materials were analyzed for validation of the procedure. The developed microextraction procedure has been used for the preconcentration of Cu(II) in water samples with acceptable results.
已建立一种快速、简单、选择性好、经济且灵敏的分散液液微萃取方法，用于痕量铜（Cu）的预富集。Cu（II）与1-（2-吡啶偶氮）-2-萘酚络合；乙醇和四氯化碳分别用作分散剂和萃取溶剂。为实现Cu（II）的定量回收，考察了影响其萃取效率及后续测定的参数的影响，即pH值、络合试剂用量、萃取时间以及分散剂和萃取溶剂的类型与体积。检测限和定量限分别为0.06和0.20μg/L。该方法的富集因子为60，相对标准偏差<5%。分析了TMDA 51.3和TMDA 70强化水标准参考物质以验证该方法。所开发的微萃取方法已用于水样中Cu（II）的预富集，结果令人满意。
