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当前位置: 首页 > 文章 > 红薯粉条中非法添加物石蜡指标性成分的检测方法研究 食品工业科技 2017,38 (3) 290-294+298
Position: Home > Articles > Study on determination of paraffin's index components illegally added into sweet potato vermicelli Science and Technology of Food Industry 2017,38 (3) 290-294+298

红薯粉条中非法添加物石蜡指标性成分的检测方法研究

作  者：
吴泽君;谢佳琦;郭世明;雷德卿
单  位：
株洲市食品药品检验所
关键词：
石蜡;红薯粉条;气相色谱;气相色谱质谱仪
摘  要：
建立了气相色谱法(GC)及气相色谱质谱法(GC-MS)测定红薯粉条中非法添加物石蜡指标性成分正二十二烷和正二十八烷的方法。样品经湿法消解,石油醚(30~60℃)萃取,旋转蒸发至干,正己烷定容后进样GC及GC-MS分析。GC法正二十二烷回收率为80.7%~82.5%,相对标准偏差为8.2%~9.9%,检出限为2.4 mg/kg,定量限为3.8 mg/kg;正二十八烷回收率为83.4%~86.2%,相对标准偏差为7.8%~9.3%,检出限为1.8 mg/kg,定量限为3.3 mg/kg,GC-MS法正二十二烷回收率为81.1%~84.5%,相对标准偏差为7.2%~9.8%,检出限为0.1 mg/kg,定量限为0.2 mg/kg;正二十八烷回收率为80.0%~86.7%,相对标准偏差为6.5%~9.2%,检出限为0.05 mg/kg,定量限为0.07 mg/kg。GC-MS较GC专属性强,灵敏度高,定量准确,能满足于红薯粉条中非法添加的石蜡的检测。
译  名：
Study on determination of paraffin's index components illegally added into sweet potato vermicelli
作  者：
WU Ze-jun;XIE Jia-qi;GUO Shi-ming;LEI De-qing;Zhuzhou Institute for Food and Drug control;
关键词：
paraffin;;sweet potato vermicelli;;gas chromatography;;gas chromatography-mass spectrometry
摘  要：
Two methods,gas chromatography( GC) and gas chromatography- mass spectrometry( GC- MS) were proposed for the determination of n- Docosane and n- Octacosane,which were the index components of paraffin illegally added into sweet potato vermicelli.After wet digestion,extracted with petroleum ether( b.p 30~60 ℃),the samples were drying with rotary evaporation.Subsequently,the analytes were analyzed by GC and GC- MS after dissolved with n- hexane.The recoveries of n- Docosane and n- Octacosane in GC method were 80.7% ~82.5% and 83.4% ~86.2%,respectively,with the relative standard deviations 8.2%~9.9% and 7.8% ~9.3%,while those of GC- MS method were 81.1% ~84.5% and 80.0% ~86.7%,and the relative standard deviations were 7.2% ~9.8% and 6.5% ~9.2%,respectively. The limit of detection( LOD) and the limit of quantitation( LOQ)about n- Docosane were 2.4 mg / kg and 3.8 mg / kg separately in GC,while those of n- Octacosane were 1.8 mg / kg and3.3 mg / kg. In GC- MS,the LOD and LOQ of n- Docosane were 0.1 mg / kg and 0.2 mg / kg,while those of n- Octacosane were0.05 mg / kg and 0.07 mg / kg separately.Compared with GC,GC- MS had a better performance about specificity,sensitivity and quantification,and this method was suitable for the detection of paraffin added illegally in sweet potato vermicelli.

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