目的 采用气相色谱-质谱联用法，快速测定一次性竹木筷中4种抑菌防腐剂。方法 样品经破碎或粉碎后用甲醇超声提取，旋转蒸干后用正己烷溶解，试液经DB-5MS石英毛细管色谱柱分离，质谱仪检测，外标法定量。结果 建立的4种目标物的定量方法在0.2~10 mg/L的线性关系良好(R²>0.99)，在3种浓度的加标水平下，加标回收率为90.0%~103%，相对标准偏差为0.94%~12.6%;外标法定量如下:联苯、邻苯基苯酚定量限均为0.1 mg/kg，抑霉唑定量限为0.2 mg/kg，噻菌灵定量限为0.3 mg/kg。结论 该方法前处理简捷高效、灵敏度高、准确性高，可实现食品用一次性竹木筷中抑菌防腐剂的快速筛查测定。

The work aims to establish a method for simultaneously and rapidly determining four antibacterial and antifungal agents in disposable bamboo and wood chopsticks by gas chromatography-mass spectrometry.The samples were extracted by ultrasonic methanol after crushing or smashing, and dissolved by n-hexane after rotating evaporation. The test solution was separated by DB-5MS quartz capillary column, detected by mass spectrometer, and quantified by external standard method. The Result showed that the established quantitative methods of the four target substances had a good linear relationship (R2>0.99) in the range of 0.2-10 mg/L. Under the three concentrations, the recovery rates were 90.0%-103%, the relative standard deviations were 0.94%-12.6%. The limits of quantification were 0.1 mg/kg for biphenyl and o-phenylphenol, 0.2 mg/kg for apromazole and 0.3 mg/kg for thiamendazole. In conclusion, the method is simple, efficient, sensitive, and accurate, and can be used for rapid screening and determination of antibacterial preservatives in disposable bamboo and wood chopsticks used for food.