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Table 4

Desorption temperature and characteristic peaks of fragmentation (m/z) of pure H2CO, CH3OH, HCOOH, GA, EG, and POM.

Molecules Desorption m/z Attribution
temperature (K) (%)

30 (60) CH2O
H2CO 100–110 K 29 (100) HCO+

32 (75) CH3OH
CH3OH 140–150 K 31 (100) HOCH
30 (7) HCH2O
29 (50) HCO+

46 (80) HCOOH
HCOOH 170–180 K 45 (29) HCOO+
29 (100) HCO+

60 (10) HCOCH2OH
GA 170–180 K 32 (50) O
31 (100) H2COH+
30 (7) HCH2O
29 (40) HCO+

62 (10) HOCH2CH2OH
61 (7) OCH2CH2OH+
EG 220–230 K 43 (16) C2H3O+
33 (36) OOH+
32 (10) H3COH
31 (100) H2COH+
30 (5) CH2O
29 (20) HCO+

61 (15) CH2OCH2OH+
47 (5) OCH2OH+
POM 220–280 K 31 (29) HOCH
30 (70) CH2O
29 (100) HCO+

Notes. Only peaks with intensities higher than 5% are listed.

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