Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (6): 1152-1161.DOI: 10.3969/j.issn.1004-1524.2022.06.06

• Crop Science • Previous Articles     Next Articles

Evaluation of physicochemical properties, fatty acids and volatile components of different tobacco seed oils

SONG Biqing1(), YANG Xiaodong1, ZHENG Yunye1, WANG Guoping1, XU Shengchun2, ZHAO Yan3, ZHAO Shanshan3, MA Yuxuan3,*(), LI Sujuan2,*()   

  1. 1. Yuxi Zhongyan Tobacco Seed Co., Ltd., Yuxi 653100, Yunnan, China
    2. Central Laboratory, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. Institute of Quality Standard & Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2021-09-23 Online:2022-06-25 Published:2022-06-30
  • Contact: MA Yuxuan,LI Sujuan

Abstract:

In this study, the Soxhlet extraction method was used for extracting tobacco accessions. The physicochemical properties were measured, and the fatty acid composition and volatile components of tobacco seed oil were determined by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) for quality evalution. The results showed that there were significant differences in acid value, specific gravity, peroxide value and iodine value among eight tobacco seed oils, except saponification value and refractive index. Hongda and NC89 had the lowest acid value, Baoshan 4 showed the lowest peroxide value, the highest iodine value is NC89, and Dashubazhiba was with the highest specific gravity. Based on the performance of physical and chemical properties, the Burley21 has a better quality, whose acid value, saponification value, specific gravity, peroxide value, iodine value and refractive index were 0.75 mg·g-1, 185.04 mg·g-1, 0.84 g·cm-3, 1.17%, 1 520.5 g·kg-1 and 1.467 81, respectively. All the seed oil of eight different tobacco accessions were showed a high level of polyunsaturated fatty acids contents (785.99-965.99 mg·g-1), and the polyunsaturated fatty acids/saturated fatty acids(PUFA/SFA) value ranged from 5.61 to 6.60. The linoleic acid content was the highest (772.41-944.20 mg·g-1) among all the measured fatty acids. On the other hand, in total, we detected seven kinds of volatile substances, including palmitic acid methyl ester, methyl palmitic acid, linoleic acid, oleic acid, linoleic acid, methyl caprolactam, and 2, 2'-methylene double-(4-methyl-6-tertiary butyl phenol) from the seed oil. The composition and the content of volatile substances were highly consistent with the polyunsaturated fatty acids. In summary, considering the results of fatty acids and volatile substances, we found that Yunxue 2 and Burley21 showed better quality. Taken together, we concluded that the Burley21 is an ideal raw material for tobacco seed oil.

Key words: tobacco seed, oil, the physicochemical properties, fatty acid, volatile components

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