国际实验室间研究通过实施保留指数系统来规范基于液体染色学的真菌毒素保留时间
M J Kelman1, J B Renaud1, P McCarron2
1London Research and Development Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, Ontario N5 V 4T3, Canada.
Journal of chromatography. A
|February 6, 2025
概括
一个新的保留指数 (RI) 系统改善了在食品安全测试中的真菌毒素识别. 这种方法提高了不同实验室和分析技术的数据一致性,提高了对真菌毒素检测的信心.
科学领域:
- 食品科学与技术 食品科学与技术
- 分析化学 分析化学
- 食品安全 食品安全
背景情况:
- 菌毒素监测对于全球食品系统的安全和保障至关重要.
- 缺乏标准化的方法和多样化的实验室实践使菌毒素数据比较复杂化.
- 菌毒素的化学多样性为准确的鉴定和数据共享带来了挑战.
研究的目的:
- 为了验证先前引入的保留指数 (RI) 系统,用于基于液态染色学和质谱学 (LC-MS) 的真菌毒素确定.
- 使用RI系统评估菌毒素识别的实验室间一致性和准确性.
- 评估移动相和柱化学对各种真菌毒素的RI值的影响.
主要方法:
- 进行了一项跨实验室研究,使用N-基-3-硫酸盐 (NAPS) 作为RI标准和36种真菌毒素标准.
- 参与实验室使用预先优化的LC-MS方法分析标准,提交44种分析方法的数据.
- 将菌毒素保留时间 (tR) 转换为与NAPS标准相对的RI值;使用Tanimoto系数来提高预测准确度.
主要成果:
- 三甲基 (脱氧尼瓦伦醇,3-乙脱氧尼瓦伦醇,15-乙脱氧尼瓦伦醇) 在不同移动阶段和列中表现出一致的tR (± 20-50 RI单位).
- 其他真菌毒素的RI值受到移动相组成和柱体化学的显著影响.
- 当RI系统与坦尼莫托系数进行校正时,它显示了预测tR和提高识别准确性的潜力.
结论:
- 保持指数 (RI) 系统显示了提高LC-MS分析中真菌毒素识别可靠性和一致性的巨大潜力.
- 虽然一些真菌毒素表现出强大的RI稳定性,但其他需要仔细考虑染色学条件才能准确确定.
- 采用RI系统,特别是与结构相似性校正相结合时,可以增加对跨不同分析平台的真菌毒素识别的信心.
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