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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2012 Jul 31;904:73–80. doi: 10.1016/j.jchromb.2012.07.022

Fig. 2.

Fig. 2

Influence of human urine sample volume used during SPE extractions on the matrix effect (%) of 5 phthalate monoester metabolites and BPA. The volumes investigated were 200, 500 and 1000 μl.