在兽药残留分析方面，运用色谱-质谱技术进行动物基质中残留药物的定性、定量检测。在微生物耐药性方面，运用蛋白组学和代谢组学技术开展耐药机制研究。

代表性文章：

1.Xi Xia et al.Validation of a method for simultaneous determination of nitroimidazoles,benzimidazoles and chloramphenicols in swine tissues by ultra-highperformance liquid chromatography–tandem mass spectrometry.Journal of Chromatography A, 1292 (2013) 96– 103.

2. Xi Xia et al. Validation of a confirmatory method for the determination of melamine in egg bygas chromatography–mass spectrometry and ultra-performance liquidchromatography–tandem mass spectrometry. AnalyticaChimicaActa651 (2009) 196–200.