Abstract
Off-flavor of a spray-dried skim milk powder has been investigated. Commercially processed spraydried skim milk was homogenized with water, and the volatiles were isolated by simultaneous steam distillation-extraction under reduced pressure using diethyl ether as a solvent. The odor concentrate was analyzed by gas chromatography and gas chromatograph-mass spectrometry. To elucidate the compounds contributing to the off-flavor, the concentrate was fractionated by silica gel TLC. A slightly polar fraction with cowhouse-like odor, which was similar to the odor attribute of off-flavor, was further fractionated by a preparative GC. Tetradecanal, having a content about 10 times higher in the offflavored skim milk than in a normal one, was responsible for a sickening and aldehydic odor. β-Ionone and benzothiazole were 76 and 37 times higher in the off-flavored skim milk, respectively, and the former imparted a fragment and haylike odor and the latter a sulfuric and quinoline-like odor.
| Original language | English |
|---|---|
| Pages (from-to) | 1323-1327 |
| Number of pages | 5 |
| Journal | Journal of Agricultural and Food Chemistry |
| Volume | 42 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 1 1994 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Agricultural and Biological Sciences(all)
Cite this
Off-Flavor Compounds in Spray-Dried Skim Milk Powder. / Shiratsuchi, Hideki; Shimoda, Mitsuya; Imayoshi, Kazuhiro; Noda, Katsuhiko; Osajima, Yutaka.
In: Journal of Agricultural and Food Chemistry, Vol. 42, No. 6, 01.06.1994, p. 1323-1327.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Off-Flavor Compounds in Spray-Dried Skim Milk Powder
AU - Shiratsuchi, Hideki
AU - Shimoda, Mitsuya
AU - Imayoshi, Kazuhiro
AU - Noda, Katsuhiko
AU - Osajima, Yutaka
PY - 1994/6/1
Y1 - 1994/6/1
N2 - Off-flavor of a spray-dried skim milk powder has been investigated. Commercially processed spraydried skim milk was homogenized with water, and the volatiles were isolated by simultaneous steam distillation-extraction under reduced pressure using diethyl ether as a solvent. The odor concentrate was analyzed by gas chromatography and gas chromatograph-mass spectrometry. To elucidate the compounds contributing to the off-flavor, the concentrate was fractionated by silica gel TLC. A slightly polar fraction with cowhouse-like odor, which was similar to the odor attribute of off-flavor, was further fractionated by a preparative GC. Tetradecanal, having a content about 10 times higher in the offflavored skim milk than in a normal one, was responsible for a sickening and aldehydic odor. β-Ionone and benzothiazole were 76 and 37 times higher in the off-flavored skim milk, respectively, and the former imparted a fragment and haylike odor and the latter a sulfuric and quinoline-like odor.
AB - Off-flavor of a spray-dried skim milk powder has been investigated. Commercially processed spraydried skim milk was homogenized with water, and the volatiles were isolated by simultaneous steam distillation-extraction under reduced pressure using diethyl ether as a solvent. The odor concentrate was analyzed by gas chromatography and gas chromatograph-mass spectrometry. To elucidate the compounds contributing to the off-flavor, the concentrate was fractionated by silica gel TLC. A slightly polar fraction with cowhouse-like odor, which was similar to the odor attribute of off-flavor, was further fractionated by a preparative GC. Tetradecanal, having a content about 10 times higher in the offflavored skim milk than in a normal one, was responsible for a sickening and aldehydic odor. β-Ionone and benzothiazole were 76 and 37 times higher in the off-flavored skim milk, respectively, and the former imparted a fragment and haylike odor and the latter a sulfuric and quinoline-like odor.
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UR - http://www.scopus.com/inward/citedby.url?scp=0001104676&partnerID=8YFLogxK
U2 - 10.1021/jf00042a014
DO - 10.1021/jf00042a014
M3 - Article
AN - SCOPUS:0001104676
VL - 42
SP - 1323
EP - 1327
JO - Journal of Agricultural and Food Chemistry
JF - Journal of Agricultural and Food Chemistry
SN - 0021-8561
IS - 6
ER -