微波萃取-GC/MS法分析测定塑料中多环芳烃

Determination of PAHs in Plastics by Microwave Extraction Coupled with GC/MS

建立了塑料中16种美国环境保护局（EPA）优先监控的多环芳烃的气相色谱-质谱（GC／MC）联用分析方法。样品经微波萃取后，再经硅胶柱净化，用GC／MS分离测定。优化了16种多环芳烃（PAHs）的分离测定条件．结果16种PAHs的平均回收率为64．2％-95．6％，精密度实验RSD为0．8％-6．2％，检测限（S／N为3）为0．001～0．01mg／kg。该方法灵敏度高、准确性好，完全可以满足塑料多环芳烃的检测要求。

A method was established for the determination of polycyclic aromatic hydrocarbons （PAHs）, priority monitoring pollatants by EPA in the US, in plastics by gas chromatography-mass spectrometry （GC/ MC）. The sample is first extracted by microwave, then cleaned-up by the column of silicon gel. After cleaned up, 16 PAHs in the sample are separated and quantified by the proposed method. The average recovery varied from 60.8 % to 95.6% while the relative standard derivation of the precision experiment ranged from 0.8% to 6.2%. The limits of detection are 0.001 to 0.01mg/kg at 3 of S/N. This method is sensitive, accurate and suitable to the determination of PAHs in plastics,