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a GC-EI-MS-SCAN chromatogram for mixture of IS solution with standard solution of MDPBP (500 ng/cm3) in methanol (upper chromatogram) and chromatogram obtained by GC-EI-MS-SIM for the extracted blank blood sample used to validation procedure (lower chromatogram); b EI-MS (70 eV) proposed mass spectral fragmentation pattern of MDPBP
