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Joos PE, Godoi AF, De Jong R, de Zeeuw J, Van Grieken R. Trace analysis of benzene, toluene, ethylbenzene and xylene isomers in environmental samples by low-pressure gas chromatography-ion trap mass spectrometry. J Chromatogr A. 2003 Jan 24;985(1-2):191–6. doi: 10.1016/s0021-9673(02)01843-5. PMID: 12580486. |