使用Chiral GC/MS进行商业化-4-ol型茶树油的认证方法的比较
Kathryn L Linge1, Leif Cooper1, Angela Downey1
1ChemCentre, Corner Manning Road and Townsing Drive, Bentley 6102, Australia.
Journal of agricultural and food chemistry
|April 3, 2024
概括
新的反体气色谱质谱法方法可以检测伪造的茶树油 (TTO). 对烯反体比率和p-cymene含量的分析可靠地识别出未改和未氧化的TTO产品.
科学领域:
- 分析化学 分析化学
- 自然产品化学 自然产品化学
- 植物化学 植物化学
背景情况:
- 全球对茶树油 (TTO) 的需求导致商业产品的改增加.
- 现有的标准可能并不总是有效地识别伪造的TTO.
- 对烯的基质分析对于TTO认证至关重要.
研究的目的:
- 开发和验证一种用于TTO分析的新型体气色谱质谱法 (GC-MS) 方法.
- 确定可靠的标记物来检测伪造和氧化TTO.
- 为了比较TTO认证的不同分析方法的有效性.
主要方法:
- 使用体气色谱质谱法 (GC-MS) 进行关键烯的奇拉分析: (±) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (±) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 和 (±) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- 在真实 (n=88) 和氧化 (n=12) 澳大利亚TTO样本中含量>0.01%的量化成分.
- 分析了9个商业TTO样本,并将结果与ISO 4730:2017标准和反体比率进行了比较.
主要成果:
- 真正的TTO样本符合ISO 4730:2017和已知的反体比率;p-cymene是氧化物的标记物.
- 根据ISO 4730:2017标准,构成成分在总离子染色图 (TIC) 峰值面积的84.5-89.8%之间.
- 利蒙,特-4-ol和α-terpineol的等离子比率在两个商业样本中提供了明显的改证据,超过了标准ISO分析.
结论:
- 关键烯的酶体比率分析是识别伪造的TTO的更明确的方法,而不是仅仅进行标准ISO 4730:2017分析.
- 对p-cymene百分比的量化有效地识别了氧化的TTO.
- 通过对抗分子比率和p-cymene量化的结合,可以直接识别未经染和未经氧化的TTO.
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