Figure 5: GC-MS extracted ion chromatograms (m/z = 117) of an acetic acid standard upon derivatization (18 h at 70°C) with a) MSFTA with ACN, b) BSTFA (1%TMCS), c) BSTFA 1% TMCS with ACN, d) BSTFA 1% TMCS with pyridine.