食品科学

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气相色谱法检测油脂中低热量短长链甘油三酯操丽丽,操新民,庞 敏,潘丽军,姜绍通*

操丽丽,操新民,庞 敏,潘丽军,姜绍通*   

  1. 合肥工业大学生物与食品工程学院,安徽省农产品精深加工重点实验室,安徽 合肥 230009
  • 出版日期:2015-01-25 发布日期:2015-01-16
  • 通讯作者: 姜绍通
  • 基金资助:

    国家自然科学基金面上项目(31371729);“十一五”国家科技支撑计划项目(2010BAD01B07);
    合肥工业大学青年教师创新项目(2013HGQC0006)

Determination of Short and Long Chain Triglycerides in Edible Oils by Gas Chromatography

CAO Lili, CAO Xinmin, PANG Min, PAN Lijun, JIANG Shaotong*   

  1. Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Biotechnology and Food Engineering,
    Hefei University of Technology, Hefei 230009, China
  • Online:2015-01-25 Published:2015-01-16
  • Contact: JIANG Shaotong

摘要:

利用气相色谱-质谱联用技术结合计算机质谱库检索和特征离子,对短长链甘油三酯进行组分鉴定。建立以DB-17 ht熔融石英毛细管柱作为分析柱,气相色谱-氢火焰离子化检测器分析油脂样品中短长链甘油三酯含量的方法。结果表明,在质量浓度0.5~20.0 mg/mL范围内,含量与峰面积呈现良好的线性关系;各组分的保留
时间和峰面积的相对标准偏差分别小于0.05%和2.0%,方法的重复性好。转酯化和普通大豆油加标回收实验表明,平均回收率分别为98.62%和97.59%。该方法可对短长链甘油三酯各组分进行分离,精确度高、重复性好,可用于油脂中短长链甘油三酯的含量分析。

关键词: 气相色谱, 短长链甘油三酯, 质谱, 氢火焰离子化检测器

Abstract:

The chemical compositions of short and long chain triglycerides (SLCTs) were analyzed by gas chromatographymass
spectrometry (GC-MS) through mass spectral library searching and characteristic ions. A gas chromatography with
flame ionization detection (GC-FID) method was developed for determining the content of SLCTs in edible oil samples
using DB-17 ht fused silica capillary column as the analytical column. The results showed a good linear correlation between
peak area and concentration in the range of 0.5–20.0 mg/mL. The relative standard deviations for retention time and
peak area of each SLCT were less than 0.05% and 2.0%, respectively, suggesting good reproducibility of the developed
method. The average recoveries from spiked samples of transesterified and original soybean oil were 98.62% and 97.59%,
respectively. This method allowed accurate and highly repeatable quantification of SLCTs in edible oils.

Key words: gas chromatography (GC), short and long chain triglycerides, mass spectrometry (MS), flame ionization detector (FID)

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