title: A gas chromatography-tandem quadrupole mass spectrometric analysis of policosanols in commercial vegetable oils.
abstract: Reportedly policosanols (PCs) have various beneficial functionalities on health. A gas chromatography-tandem mass spectrometry (GC-MS/MS) with a low limit of detection (LOD), and high specificity, recovery, and precision was successfully established for the PC analysis in vegetable oils. The LODs for the PCs were in the range of 0.002 to 0.016 μg/mL. The relative standard deviation (RSD) for the repeated analysis of PCs was less than 3.356%. The mean recoveries for spiked heptacosanol and octacosanol in vegetable oil were 102.3% and 106.3%, respectively. The total PC contents in the vegetable oils varied from 3.01 to 427.83 mg/kg oil. Perilla seed, grape seed, and rice bran oils were found to be highly rich sources of PCs, containing 427.83, 245.15, and 171.17 mg PCs/kg oil, respectively. Corn, sesame, and soybean oils contained only a negligible quantity of PCs. The PC composition in vegetable oils was greatly source dependent. In perilla seed oil, octacosanol was the single most predominant component, representing 55.93% of the total PC. In grape seed oil, however, hexacosanol is the most abundant PC, followed by octacosanol, tetracosanol, and triacontanol in a decreasing order. The major PCs in rice bran oil were triacontanol, octacosanol, hexacosanol, and tetracosanol, which constituted over 87.3% of the total PC. This represents the 1st report on the composition and contents of PC in most vegetable oils analyzed here.
  
  
  CONCLUSIONS
  The information might be used for the development of vegetable oil products with beneficial functionality.
authors.affiliation: College of Food Science, Woosuk Univ., Samrea-Up, Wanju-Kun, Jeonbuk Province 565-701, Republic of Korea.
authors.forename: Dong Min
authors.initials: DM
authors.lastname: Jung
authors.forename: Mi Jin
authors.initials: MJ
authors.lastname: Lee
authors.forename: Suk Hoo
authors.initials: SH
authors.lastname: Yoon
authors.forename: Mun Yhung
authors.initials: MY
authors.lastname: Jung
mesh_terms: D053000:Analytic Sample Preparation Methods; D002855:Chromatography, Thin Layer; D004032:Diet / Q000208:ethnology; D005233:Fatty Alcohols / Q000032:analysis* / Q000737:chemistry; D005504:Food Analysis / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D007723:Korea; D057230:Limit of Detection; D012275:Oryza / Q000737:chemistry; D031343:Perilla / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D015203:Reproducibility of Results; D000073879:Rice Bran Oil; D012639:Seeds / Q000737:chemistry; D053719:Tandem Mass Spectrometry; D027843:Vitis / Q000737:chemistry; D017962:alpha-Linolenic Acid / Q000737:chemistry
chemical_list: D005233:Fatty Alcohols; D010938:Plant Oils; D017962:alpha-Linolenic Acid; C080710:policosanol; C058216:perilla seed oil; C047578:1-triacontanol; C044309:1-octacosanol; D000073879:Rice Bran Oil; C051942:1-hexacosanol