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Torrijos, Selective determination of polychlorinated biphenyls in waste oils using liquid-liquid partition followed by headspace solid-phase microextraction and gas chromatography with atomic emission detection, J. Solvent-free sample preparation by headspace solid-phase microextraction applied to the tracing of n-butyl nitrite abuse. Unmetabolized benzene and naphthalene were determined in urine via headspace solid-phase microextraction based upon the method of Waidyanatha et al. |
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