主题：【已应助】请帮忙查几篇英文文献，谢谢

【序号】：1
【作者】：Guoqiang Xiang, Shengping Wen, Xiaoyun Wu, Xiuming Jiang, Lijun He, Yulan Liu 
【题名】：Selective cloud point extraction for the determination of cadmium in food samples by flame atomic absorption spectrometry
【期刊】：Food Chemistry
【年、卷、期、起止页码】：Volume 132, Issue 1, 1 May 2012, Pages 532-536

【序号】：2
【作者】：Hayati Filik, Derya Giray
【题名】：Cloud point extraction for speciation of iron in beer samples by spectrophotometry
【期刊】：Food Chemistry
【年、卷、期、起止页码】： Volume 130, Issue 1, 1 January 2012, Pages 209-213

【序号】：3
【作者】：Xiaodong Wen, Qingwen Deng, Shoulian Ji, Shengchun Yang, Li Peng
【题名】： Design of rapidly synergistic cloud point extraction of ultra-trace lead combined with flame atomic absorption spectrometry determination 
【期刊】：Microchemical Journal
【年、卷、期、起止页码】：Volume 100, January 2012, Pages 31-35

【序号】：4
【作者】：Nehir Güler, Mervegül Maden, Sezgin Bakırdere, O. Yavuz Ataman, Mürvet Volkan 
【题名】：Speciation of selenium in vitamin tablets using spectrofluorometry following cloud point extraction
【期刊】：Food Chemistry
【年、卷、期、起止页码】：Volume 129, Issue 4, 15 December 2011, Pages 1793-1799

【序号】：5
【作者】：Halil İbrahim Ulusoy, Ramazan Gürkan, Songül Ulusoy   
【题名】：Cloud point extraction and spectrophotometric determination of mercury species at trace levels in environmental samples
【期刊】：Talanta,
【年、卷、期、起止页码】：Available online 12 November 2011