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

There are significant problems in the article that are too major to be addressed by a simple corrigendum. These problems include adsorption of BTEX on septum rubber and misrepresentation of LODs.