对分子和染色学方法进行比较分析,以检测酸奶中的棕油造
Mohammad Dowlatabadi1, Seyed Ali Mortazavi2, Hasan Ravansalar3
1Department of Food Science and Technology, Sab.C., Islamic Azad University, Sabzevar, Iran.
Scientific reports
|August 13, 2025
概括
这项研究引入了一种结合的分子和染色学方法,用于检测酸奶脂肪中的棕油造. 经过验证的方法准确地识别和量化棕油,确保食品的真实性和消费者保护.
科学领域:
- 食品科学 食品科学 食品科学
- 分析化学 分析化学
- 分子生物学分子生物学
背景情况:
- 乳制品中的棕油改是对食品真实性和消费者安全的日益关注的问题.
- 现有的检测方法可能缺乏全面分析所需的灵敏度或特异性.
- 确保乳制品的完整性需要强大的分析策略.
研究的目的:
- 开发和验证一种联合分子和染色学方法,用于检测和量化酸奶脂肪中的棕油造.
- 建立一个可靠的策略来识别棕油 (Elaeis guineensis) 使用特定的遗传标记和化学分析.
- 评估开发的方法在商业乳制品中的实际适用性.
主要方法:
- 使用修改的CTAB协议进行DNA提取,然后进行常规和定量PCR (qPCR),以向油棕特有的MT3-B基因.
- 气色谱-火焰电离检测 (GC-FID) 用于量化酸奶脂肪中不可肥的脂质部分中的植物.
- 开发一种双分析策略,将qPCR和GC-FID整合起来,用于全面检测棕油.
主要成果:
- qPCR检测表现出高特异性和灵敏度,检测极限为0.01 ng,量化极限为0.02 ng.
- GC-FID分析显示,在棕油度较高的情况下,植物醇含量有剂量依赖的增加.
- 在qPCR检测的DNA水平和GC测量的植物度之间发现了强烈的相关性 (r=0.89).
- 对15个商业酸奶样本的分析表明,所有样本中的棕油标记物都呈阳性结果.
结论:
- 综合的qPCR和GC-FID方法提供了一个快速,灵敏和可靠的方法来检测酸奶脂肪中的棕油造.
- 这种双重分析策略增强了食品质量保证,并支持对欺诈行为的监管执法.
- 该方法在商业样本上的成功应用证明了其在保护乳制品供应链方面的实际实用性.
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