Retraction notice to "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" [J. Chromatogr. A 1418 (2015) 21-28]

Affiliations

• ¹ Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Iran. Electronic address: [email protected].
• ² Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Iran.
• ³ Department of Chemistry, Faculty of Sciences, Payame Noor University, Mashhad, Iran.
• ⁴ Pharmaceutical Research Center and School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.