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作者机构: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 版 物:《化学研究与应用》 (Chemical Research and Application)
年 卷 期:2010年第22卷第7期
页 面:965-968页
核心收录:
学科分类:081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学]
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 *** 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 *** calibration graph was linear in the range of 10.00~500.00 μg/L with a detection limit of 0.85 μg/*** 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.