%0 Journal Article %T RETRACTED: Synthesis and characterization of composite polymer, polyethylene glycol grafted flower-like cupric nano oxide for solid phase microextraction of ultra-trace levels of benzene, toluene, ethyl benzene and o-xylene in human hair and water samples %A Sarafraz Yazdi, Ali %A Zendegishiraz, Amene %A Z. Es'haghi %A M. Hassanzadeh-Khayyat %J Journal of Chromatography A %@ 0021-9673 %D 2015