“…It is self-evident that knowledge of the analytical reaction products is fundamentally crucial to furthering our understanding and validation of possible PVG mechanisms. Many systems have been successfully characterized using gas chromatography mass-spectrometry (GC-MS) techniques, including As, 9,10 Bi, 11–13 Br, 14,15 Cl, 15,16 Co, 13,17 I, 18 F, 19 Fe, 20,21 Hg, 22 Mo, 10 Ni, 23 Sb, 10 Se 24 and Te. 25…”