Table 2.

Products detected in SOA samples from chamber experiments using GC-MS and LC-MS.

Chemical formula	m/z BSTFA derivative (methane-CI)	MW MWBSTFA (g mol−1)	Tentative structure* and chemical name	References
GC-MS
C5H10O2	247, 231, 157, 147, 73	102		Wang et al. (2005)
		246	3-methyl-3-butene-1,2-diol (C5-diol-1)	Surratt et al. (2006)
C5H10O2	263, 247, 173, 83, 73,	118		Paulot et al. (2009)
		262	2-methyl-2,3-epoxy-but-1,4-diol (IEPOX-1)	Surratt et al. (2010)
				Zhang et al. (2012)
C5H18O3	263, 247, 173, 83, 73	118
		262	2-methyl-3,4-epoxy-but-1,2-diol (IEPOX-2)
C4H8O4	337, 321, 293, 219, 203	120		Claeys et al. (2004a)
		336	2-methylglyceric acid (2-MG)	Surratt et al. (2006)
				Edney et al. (2005)
				Szmigielski et al. (2007)
C5H12O4	409, 319, 293, 219, 203	136		Claeys et al. (2004a)
		424	2-methylthreitol (2MT)	Wang et al. (2004)
				Edney et al. (2005)
				Surratt et al. (2006)
				Nozière et al. (2011)
C5H12O4	409, 319, 293, 219, 203	136
		424	2-methylerythritol (2MT)
C8H14O7	495, 321, 219, 203, 73	222		Surratt et al. (2006)
		510	2-methylglyceric acid dimer (2-MG dimer)	Szmigielski et al. (2007)
LC-MS
C5H10O6S	197, 167, 97, 81	198		Tao et al. (2014)
			IEPOX-derived organosulfate
C4H8O7S	199, 119, 97, 73	200		Surratt et al. (2007a)
			2-methylglyceric acid organosulfate (2-MG OS)	Gomez-Gonzalez et al. (2008)
				Shalamzari et al. (2013)
				Riva et al. (2016)
C5H8O7S	211, 193, 113, 97	212		Surratt et al. (2008)
			2(3H)-furanone, dihydro-3,4-dihydroxy-3-methyl organosulfate	Hettiyadura et al. (2015)
				Spolnik et al. (2018)
C5H10O7S	213, 183, 153, 97	214		Hettiyadura et al. (2015)
			2,3,4-furantriol, tetrahydro-3-methyl-organosulfate	Spolnik et al. (2018)
C5H12O7S	215, 97	216		Surratt et al. (2007a)
			2-methyltetrol organosulfate (2MT OS)	Gomez-Gonzalez et al. (2008)
				Surratt et al. (2010)
C5H10O8S	229, 149, 97, 75	230		This study
			2-methylthreonic acid organosulfate
C5H9O9S	243, 163, 145, 101	244		This study
			2-methyltartaric acid organosulfate
C5H11NO8S	244, 226, 197, 183, 153, 97	245		This study
			2-methyltetrol nitrosoxy-organosulfate
C5H11NO9S	260, 197, 183, 153, 97	261		Surratt et al. (2007a)
			2-methyltetrol nitroxy-organosulfate	Surratt et al. (2008)
C5H9NO10S	274, 211, 193, 153, 97	275		This study
			2-methylthreonic acid nitroxy-organosulfate

^*For more stereochemically complex molecules a representative isomer is shown.