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在沉积物样本中分析异环芳香化合物的验证方法

Nipuni N Vitharana¹, Thor Halldorson¹, Zhe Xia¹

¹Centre for Oil and Gas Research and Development, Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

Journal of chromatography. A

|February 11, 2024

概括

这项研究开发了一种新方法来分析沉积物中的异环多环芳香化合物 (HPAC). 气色谱-并联质谱法准确量化了这些具有挑战性的化合物,揭示了比传统的多环芳 (PAHs) 更低的度.

科学领域:

环境化学环境化学
分析化学分析化学
有机地化学有机地化学

背景情况:

对于含有,硫或氧的异环多环芳香化合物 (HPAC) 存在有限的分析方法.
在HPAC分析中的挑战包括缺乏标准,大量的异构体,以及缺乏经过认证的参考材料.
对多环芳 (PAH) 的传统方法不适合更极性HPAC.

研究的目的:

开发和验证一种检测和量化53种非化和化HPAC沉积物的方法.
为了提高从沉积物样本中提取极性HPAC的提取效率.

主要方法:

开发两种多重反应监测方法,使用气相色谱与双重质谱仪 (GC-MS/MS) 相结合.
通过修改溶剂极性 (二甲:乙烯酸,50:50) 来优化加速溶剂提取.
验证方法的准确性,精度,检测极限和量化.

主要成果:

经过验证的方法表现出良好的准确性 (>67%对46/53分析) 和精度 (所有分析对象<30%RSD).
检测极限在0.1~2.3 ng/g之间,量化极限在1.5~7.6 ng/g之间.
对加拿大沉积物样本的分析显示,与总PAH (80.9μg/g) 和化PAH (14.2μg/g) 相比,HPAC总量 (7.3μg/g) 的度明显较低.

结论:

开发的GC-MS/MS方法对于对沉积物中HPAC及其基衍生物的有针对性的分析是有效和高效的.
改进的提取技术增强了对更多极性化合物的分析物回收.
与受污染的沉积物中的PAH相比,HPAC可能不那么普遍或不那么有效地通过传统方法提取.

关键词:

气体染色学串联质谱学质谱学异环芳香化合物异环芳香化合物异环芳香化合物多环芳香化合物多环芳香化合物沉积物沉积物是一种沉积物.有针对性的分析.

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