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Methanol Methanol HPLC Acetic Acid 1,4 Dioxane 1,4 Dioxane HPLC Acetonitrile Acetonitrile HPLC Oleic Acid Buffer PH4 Buffer PH7 Buffer PH10 Ammonia Solution N,N Dimethylformamide Formic Acid n Hexane n Hexane HPLC 2-propanol 1-Butanol Iso-Octane Iso-Octane HPLC