TY - GEN AU - Chen,B H AU - Taylor,E H AU - Pappas,A A TI - Comparison of derivatives for determination of codeine and morphine by gas chromatography/mass spectrometry SN - 0146-4760 PY - 1990///0425 KW - Acetamides KW - Anhydrides KW - Benzoates KW - Chemical Phenomena KW - Chemistry KW - Codeine KW - analysis KW - Fluoroacetates KW - Fluorocarbons KW - Gas Chromatography-Mass Spectrometry KW - Indicators and Reagents KW - Morphine Derivatives KW - Nalorphine N1 - Publication Type: Comparative Study; Journal Article UR - https://doi.org/10.1093/jat/14.1.12 ER -