(a)
(b)
(c)
(d)
(e)
Figure 4: Structures of common derivatizing agents used in GC-based analysis. (a) N,O-Bis(trimethylsilyl)trifluoroacetamide (BSTFA). (b) N-Methyl-N-trimethylsilyl-trifluoroacetamide (MSTFA). (c) tert-Butyl dimethylsilyl (tBDMS). (d) Pentafluorobenzoyl chloride (PFBzCl). (e) Acetic anhydride.