Add time:09/02/2019         Source:sciencedirect.com

A headspace capillary gas chromatographic method was developed to determine trifluoroacetic acid (TFA) in a bulk substance (Ceronapril (cas 111223-26-8)). The bulk sample is reacted in a sealed headspace vial with dimethyl sulfate in concentrated sulfuric acid to convert TFA to methyl trifluoroacetate (MTFA). A portion of the headspace of the vial containing the MTFA is chromatographed on a PoraPLOT Q 0.32 mm I.D. capillary column in the split injection mode with flame ionization detection. The limit of detection is less than 10 ppm (w/w).

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