电纺聚苯乙烯纳米纤维固相萃取-气相色谱质谱法测定复合膜袋中27种芳香胺的迁移量

Determination of 27 aromatic amines migration in composite film bags by electrospun polystyrene nanofiber solid phase extraction-gas chromatography-mass spectrometry

中文关键词:  电纺纳米纤维  聚苯乙烯  芳香胺  固相萃取柱

英文关键词:electrospun nanofiber  polystyrene  aromatic amine  solid phase extraction column

中文摘要:

      目的 建立电纺聚苯乙烯纳米纤维固相萃取-气相色谱质谱法测定复合膜袋中27种芳香胺的迁移量的方法。方法 样品经活化的、由电纺纳米聚苯乙烯材料制作的固相萃取小柱上样后, 使用叔丁基甲醚洗脱, 采用程序升温进样口进样。采用气相色谱质谱法(gas chromatography mass spectrometry, GC-MS)测定复合膜袋中27种游离芳香胺在水基食物模拟物中的迁移量, 选择离子内标法定量。结果 电纺纳米聚苯乙烯材料对水基食品模拟物中的芳香胺具有很好的吸附分离能力, 27种芳香胺的回收率为80.2%~110.4%, 精密度在2.0%~6.9%之间, 定量限达到0.01 mg/kg。结论 电纺纳米材料比表面积大, 且对芳香胺类物质有较好的吸附能力, 在满足标准方法检出限的要求下大大降低了洗脱有机溶剂的使用量, 该种材料在仪器分析中有较强的应用前景, 且该方法准确、灵敏, 适用于水基食物模拟物中的27种芳香胺含量的测定。

英文摘要:

      Objective To establish a method for the determination of 27 kinds of aromatic amines migration in composite film bags by electrospun polystyrene nanofiber solid phase extraction- gas chromatography-mass spectrometry. Methods After the sample was loaded on an activated solid phase extraction column made of electrospun nano-polystyrene material, eluted with tert-butyl methyl ether, and injected with a temperature-programmed injection port. The migration of 27 kinds of free aromatic amines in the composite membrane bag in the water-based food simulators were determined by gas chromatography mass spectrometry (GC-MS), and quantified by the ion internal standard method. Results The electrospun nano polystyrene material had good adsorption and separation ability for aromatic amines in water-based food simulants. The recoveries of 27 kinds of aromatic amines were 80.2%?110.4%, and the precision was 2.0%?6.9%. The limit of quantitation was 0.01 mg/kg. Conclusion Electrospinning nanomaterials have large specific surface area, and have good adsorption capacity for aromatic amines, which can greatly reduce the amount of elution organic solvents while meeting the detection limit requirements of standard methods. Therefore, this kind of materials has a strong application prospect in instrumental analysis, which is accurate, sensitive and suitable for the determination of 27 kinds of aromatic amines in water-based food simulators.