Off-Flavor Compounds in Spray-Dried Skim Milk Powder

Hideki Shiratsuchi, Mitsuya Shimoda, Kazuhiro Imayoshi, Katsuhiko Noda, Yutaka Osajima

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


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 languageEnglish
Pages (from-to)1323-1327
Number of pages5
JournalJournal of Agricultural and Food Chemistry
Issue number6
Publication statusPublished - Jun 1 1994

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Agricultural and Biological Sciences


Dive into the research topics of 'Off-Flavor Compounds in Spray-Dried Skim Milk Powder'. Together they form a unique fingerprint.

Cite this