TY - GEN AU - Barroso,M AU - Dias,M AU - Vieira,D N AU - López-Rivadulla,M AU - Queiroz,J A TI - Mixed-mode solid-phase extraction for sample cleanup in hair analysis for methadone and its main metabolite SN - 1099-0801 PY - 2011///0113 KW - Analgesics, Opioid KW - analysis KW - Gas Chromatography-Mass Spectrometry KW - Hair KW - chemistry KW - Humans KW - Methadone KW - Solid Phase Extraction KW - methods N1 - Publication Type: Evaluation Study; Journal Article UR - https://doi.org/10.1002/bmc.1434 ER -