超声辅助分散液-液微萃取测定水样中的铜  

Ultrasound-assisted dispersive liquid-liquid microextraction for determination of trace copper in water samples

作　　者：杜新[1] 李卫宁[1] 张婧雯[1] 李超[1] 马晶军[1] 李敬慈[1] 

机构地区：[1]河北农业大学理学院,河北省生物无机化学重点实验室,河北保定071001

出　　处：《化学研究与应用》2010年第7期965-968,共4页Chemical Research and Application

基　　金：河北省教育厅科研发展基金项目(2007121)资助;河北农业大学非生命学科和新兴学科科研发展基金项目资助

摘　　要：The process of ultrasound-assisted dispersive liquid-liquid microextraction(USADLLME) was successfully applied for the extraction and preconcentration of trace copper from water samples,prior to flame atomic absorption spectrometry(FAAS).In the proposed approach,1-(2-pyridylazo)-2-naphthol(PAN) was used as a chelating agent and carbon tetrachloride was selected as extraction solvent.Under the optimized experimental conditions(extraction solvent volume:80 μL;pH=5.00;PAN amount:10-6 mol;extraction time:15 min and extraction temperature:40°C),an enrichment factor of 14.3 was obtained from only 6.00 mL of water sample.The calibration graph was linear in the range of 10.00～500.00 μg/L with a detection limit of 0.85 μg/L.The relative standard deviation(RSD) for eleven replicate measurements of 20.00 and 400.00 μg/L of copper were 3.71 and 3.20%.The method was applied to the analysis of tap,river,and sea water samples and good spiked recoveries over the range of 90.4～100.5% were obtained.The process of ultrasound-assisted dispersive liquid-liquid microextraction（USADLLME） was successfully applied for the extraction and preconcentration of trace copper from water samples,prior to flame atomic absorption spectrometry（FAAS）.In the proposed approach,1-（2-pyridylazo）-2-naphthol（PAN） was used as a chelating agent and carbon tetrachloride was selected as extraction solvent.Under the optimized experimental conditions（extraction solvent volume：80 μL;pH=5.00;PAN amount：10-6 mol;extraction time：15 min and extraction temperature：40°C）,an enrichment factor of 14.3 was obtained from only 6.00 mL of water sample.The calibration graph was linear in the range of 10.00～500.00 μg/L with a detection limit of 0.85 μg/L.The relative standard deviation（RSD） for eleven replicate measurements of 20.00 and 400.00 μg/L of copper were 3.71 and 3.20%.The method was applied to the analysis of tap,river,and sea water samples and good spiked recoveries over the range of 90.4～100.5% were obtained.

关 键 词：超声辅助萃取 液-液微萃取 火焰原子吸收光谱法 铜 

分 类 号：O657.3[理学—分析化学]