Table 9a. Comparison of Gas-Phase Oxidation Product Yields From Monoterpenes, on a Percent Mole (ppb/ppb) Basis, Observed in This Study With Results From Other Terpene Photooxidation Experiments Terpene Product Product Yield, % This Work Product Yield, % Other Studies Reference limonene Formaldehyde 43 92a [Librando and Tringali, 2005] 36 +/- 5a [Larsen et al., 2001] formic acid 7 54 +/- 10a [Larsen et al., 2001] 54a [Librando and Tringali, 2005] Acetone 0.4 < 0.03 [Reissell et al., 1999] not detected [Larsen et al., 2001] m/z 139b 4.9 +/- 1 39 +/- 15c [Larsen et al., 2001] 20 +/- 3 [Hakola et al., 1994] 17 +/- 3 [Arey et al., 1990] m/z 169d 68 +/- 7 29 +/- 6e [Hakola et al., 1994] 28 [Arey et al., 1990] not detected [Larsen et al., 2001] myrcene Formaldehyde 74f 30 +/- 6 [Orlando et al., 2000] formic acid 5 5 +/- 2 [Orlando et al., 2000] Acetone 22 36 +/- 5 [Orlando et al., 2000] 41 [Reissell et al., 1999] m/z 111 9.3 +/- 2 19 +/- 4g [Reissell et al., 2002] 3-carene Formaldehyde 35 21 +/- 4 [Orlando et al., 2000] 12 +/- 3 [Larsen et al., 2001] 20a [Librando and Tringali, 2005] formic acid 5 30 +/- 3 [Larsen et al., 2001] 11a [Librando and Tringali, 2005] 8 +/- 2 [Orlando et al., 2000] Acetone 9 15 +/- 3 [Orlando et al., 2000] 15 +/- 3 [Reissell et al., 1999] 15 +/- 5 [Larsen et al., 2001] m/z 169 77 +/- 8h 34 +/- 8i [Hakola et al., 1994] 31i [Arey et al., 1990] 14 +/- 5i [Larsen et al., 2001] aFrom experiments where the photolysis of H2O2 was used as the OH source. bSum of m/z 139 and 121. cYield of limona ketone. dSum of yields of m/z 169, 170, 151 (the dehydrated fragment of m/z 169), 152, 133, 123, 124, 107, and 108. eYield of endolim, also called limononaldehyde. fSubject to significant error due to concentrations beyond range of calibrations. gYield of 4-vinyl-4-pentenal. hSum of m/z 169, 170, 151 (the dehydrated fragment of m/z 169), 152, 133, 123, 124, 107, and 108. iYield of caronaldehyde.