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• W2129209082 abstract "The use of (aminomethyl)phosphonic acid (AMPA) as a drug substance starting material required its structurally-related impurities to be characterized in order to understand the final outcome and effect. Samples of AMPA were reacted with N,O-bis(trimethylsilyl)trifluoroacetamide with 10% trimethylchlorosilane (BSTFA + 10% TMCS) to produce volatile Nand O-trimethylsilyl derivatives. The derivatives were then analyzed by positive electron impact ionization gas chromatography mass spectrometry (EI+-GC-MS). Optimized reaction conditions (90°C, 150 min, 50 µL pyridine, 500 µL BSTFA + 10% TMCS) were obtained experimentally and with a design of experiment (DOE). This optimal derivatization procedure was applied to AMPA samples, resulting in the proposed structures of related impurities of AMPA." @default.
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• W2129209082 date "2011-01-01" @default.
• W2129209082 modified "2023-10-17" @default.
• W2129209082 title "Optimized Derivatization Procedure for Characterizing (Aminomethyl)phosphonic Acid Impurities by GC-MS" @default.
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• W2129209082 doi "https://doi.org/10.1093/chrsci/49.1.8" @default.
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