Research Article

Litter Quality of Populus Species as Affected by Free-Air Enrichment and N-Fertilization

Table 2

Organic matter pyrolysis compounds.

Pyrolysis compoundCodem/zMean r.t. (min)

C10 – C33 alkanes10 to 33 9.06–41.46
C10 – C26 alkenes10  :  1 to 26  : 1 9.26–34.66
di/trimethyl octaneAl1 15.32
C10-alcoholAl2 15.68
branched alkaneAl3 17.40
branched alkaneAl4 19.00
C12 alcoholAl5 19.21
C16 alcoholAl6 25.80
AlkyneAl7 26.17
C18 alcoholAl8 28.54
C19 alcoholAl9 29.72
BenzeneAr1 2.92
TolueneAr2 4.32
EthylbenzeneAr3 6.11
1,2-1,4-dimethylbenzeneAr4 6.34
styreneAr5 6.80
xyleneAr6 6.68
benzaldehydeAr7 8.57
C3-benzeneAr8 9.83
propenyl-benzeneAr9 10.11
2-hydroxy-benzaldehydeAr10 10.34
indeneAr11 10.32
acetophenoneAr12 10.80
1-methyl-1H-indeneAr13 12.71
1-methyl-4-(1-propynyl)-benzeneAr14 12.91
C3-benzeneAr15 12.78
C6-benzeneAr16 14.77
2-coumaranoneAr17 14.79
2,3-dihydro-1H-inden-1-oneAr18 15.86
C14, C16, C18 fatty acidsF14, F16, F18 24.40–29.90
C16 dioc acidF16  :  2 32.37
C16 and C29 methylketonesK16, K29 25.56, 39.86
guaiacolLg1 11.40
4-methyl-phenolLg2 11.87
4-vinylphenolLg3 15.34
4-ethylguaiacolLg4 15.57
4-vinylguaiacolLg5 16.47
syringolLg6 17.09
4-methylsyringolLg7 18.86
trans 4-(prop-2-enyl) guaiacolLg8 19.06
4-acetylguaiacolLg9 19.81
4-vinylsyringolLg10 21.13
4-(prop-2-enyl) syringol trans Lg11 23.45
4-acetylsyringolLg12 24.43
1-(2,6-dihydroxy-4-methoxyphenyl),3-phenyl-2-propen-1-oneLg13 33.31
cholesta-4,6-dien-3-diolLp1 38.28
cholest-5-en-3-ol compoundLp2 38.48
cholest-5-en-3-ol, (3. Beta.-) compoundLp3 39.09
cholest-x-en-x-ol compoundLp4 40.46
alkanoic acid methyl esterME 17.95
naphthalenePA1 13.59
1/2-methylnaphthalenePA2 16.11
phenolPh1 9.59
2-methylphenolPh2 11.17
dimethyl phenolPh3 13.26
ethyl phenolPh4 13.75
pristenePr 23.46
2- methylfuranPs1 2.43
1-methyl-1,3-cyclopentadienePs2 2.77
acetic acidPs3 3.03
2-ethyl-furanPs4 3.40
2,5-dimethyl-furanPs5 3.46
3-methyl-2-cyclopenten-1-onePs6 3.59
(2H)-furan-3-onePs8 5.02
2-ethyl-5-methylfuran?Ps9 4.92
2-furaldehydePs10 5.26
2-cyclopenten-1-one?Ps11 5.57
3-furaldehydePs12 5.87
3-methyl butanoic acidPs13 7.03
2-methyl-2-cyclopenten-1-onePs14 7.22
2-acetylfuranPs15 7.74
2,3-dihydro-5-methylfuran-2-onePs16 8.30
5-methyl-2-furaldehydePs17 8.66
dianhydrorhamnosePs18 10.32
2/7-methylbenzofuranPs19 11.47
levoglucosenonePs20 11.69
2/7-methyl benzofuranPs21 11.81
2,3,4,5-tetra-O-methyl d-glucosePs22 13.47
1,4:3,6-dianhydro-.alpha.-d-glucopyranosePs23 14.30
2,3-dihydro-benzofuranPs24 14.86
6-deoxy-3-O-methyl L-glucosePs25 17.28
3-methyl-2(3H)-benzofuranonePs26 17.59
3-methyl-2H-1-Benzopyran-2-onePs27 20.44
levoglucosanPs28 20.60
Propanenitrile?N1 3.53
methyl-1H-pyrrole?N2 3.88
4,5-dihydro-2,4-dimethyl-1H-imidazoleN3 3.97
pyridineN4 4.16
pyrroleN4a 4.21
1/3-ethyl-1H-pyrroleN5 5.12
2-methyl-pyridineN6 5.82
3-methyl-1H-pyrroleN7 5.93
2-methyl-1H-pyrroleN8 6.25
3-methyl-pyridineN9 6.76
2,3-dimethyl-1H-pyrroleN10 7.75
benzonitrileN11 8.89
1-(2-pyridinyl)-ethanoneN12 10.15
2-methyl-benzoxazoleN13 12.00
benzeneacetonitrileN14 12.43
indoleN15 16.27
x-methyl indoleN16 18.04
diketodipyrroleN17 24.13
amideN18 30.43
4-hydroxy-benzenesulfonic acidS 3.73
squaleneSq 37.05

Codes: Al: aliphatics, Ar: aromatics, F: Fatty acids, K: methylketones, Lg: lignins, Lp: lipids (sterols), ME: methylester, N: N-containing compounds, PA: polyaromatics, Ph: phenols, Pr: pristene, Ps: polysaccharides, S: S-containing products, Sq: Squalene, m/z: masses used for quantification; r.t: retention time.