Table 3. Compounds identified in the salted duck egg yolk supplemented with RE 0.1% and 0.5% (w/v) at 28 d of salting analyzed by SPME GC-MS

Compound class Groups (w/v) Peak no RT (min) Compounds names
Ester RE 0.1% 1 28.15 Methyl tetradecanoate
2 32.50 Hexadecanoic acid, methyl ester
3 32.95 Methyl hexadec-9-enoate
4 36.47 8-Octadecenoic acid, methyl ester
5 37.24 Methyl 10-trans,12-cis-octadecadienoate
RE 0.5% 1 ND ND
Acid RE 0.1% 1 15.97 Acetic acid
2 28.40 Phenol
3 31.32 Phenol, 2-methoxy-3-(2-propenyl)-
4 36.94 trans-13-Octadecenoic acid
5 44.49 n-Hexadecanoic acid
RE 0.5% 1 15.97 Acetic acid
2 34.12 Pterin-6-carboxylic acid
3 36.91 Octadec-9-enoic acid
4 44.50 n-Hexadecanoic acid
Alcohol RE 0.1% 1 3.99 Ethanol
2 30.81 Cyclobutanol
3 31.49 3-Allyl-6-methoxyphenol
RE 0.5% 1 3.99 Ethanol
Alkane RE 0.1% 1 40.59 1,4,7,10,13,16-Hexaoxacyclooctadecane
RE 0.5% 1 33.42 2-Methylaminomethyl-1,3-dioxolane
2 34.67 1,3-Dioxolane, 4-methyl-
3 41.54 1,4,7,10,13,16-Hexaoxacyclooctadecane
Ketone RE 0.1% 1 11.71 Acetoin
RE 0.5% 1 12.78 2,3-Octanedione
2 14.51 2-Nonanone
Aldehyde RE 0.1% 1 6.49 Glutaraldehyde
2 17.77 Benzaldehyde
3 19.65 2,4-Decadienal, (E,E)-
4 37.09 3,5-di-tert-Butyl-4-hydroxybenzaldehyde
RE 0.5% 1 6.50 Hexanal
2 9.11 Butanal, 3-methyl-
3 11.87 Octanal
4 14.63 Nonanal
5 15.50 2-Tridecenal, (E)-
6 17.77 Benzaldehyde
7 20.58 Benzeneacetaldehyde
Nitrogen RE 0.1% 1 3.55 N,N-Dimethylacetoacetamide
2 29.90 3-Propoxyamphetamine
RE 0.5% 1 25.15 Urea
2 28.99 2-Methoxy-N-methylethylamine
Ether RE 0.1% 1 45.90 15-Crown-5
RE 0.5% 1 41.12 Octaethylene glycol monododecyl eter
2 41.82 3,6,9,12-Tetraoxatetradecan-1-ol
3 43.70 15-Crown-5
Others RE 0.1% 1 ND ND
RE 0.5% 1 10.37 Furan, 2-pentyl-
2 15.16 1,3-Hexadiene, 3-ethyl-2-methyl-
SPME GC-MS, solid phase microextraction - gas chromatography - mass spectrometry; RE, rosemary extract; ND, not detected.