摘要
建立了气相色谱和气相色谱-质谱法检测10种植物源性和动物源性食品中乙草胺残留量检测方法。粮谷类和动物源性样品采用乙腈提取,GPC结合硅胶固相萃取柱净化;蔬菜类样品采用乙酸乙酯提取、硅胶固相萃取柱净化;元葱等样品先进行微波消解,然后采用乙酸乙酯提取,硅胶固相萃取柱净化。气相色谱和气相色谱-质谱联用法检测。两种方法检出限均为0.004 mg/kg;在0.01～0.16 mg/L范围内均呈良好的线性关系,相关系数为0.9998和0.9997;在0.01、0.02和0.05 mg/kg的添加水平下,添加回收率在70%～102%之间;相对标准偏差(RSD)均小于10%。
A method was established to determination of acetochlor in 10 kinds of foods by gas chromatography and gas chromatography-mass spectrometry. The foods of grain and animal-based were extracted by acetonitrile and cleaned with GPC combined silica gel SPE cartridge, extracted by ethyl acetate and cleaned only with silica gel SPE cartridge for the foods of vegetables. Specially, onion was digested with microwave firstly. Then, extracted by ethyl acetate and cleaned with silica gel SPE cartridge. The final extract of food was analyzed by GC and GC-MS. The detection limit, both GC and GC-MS, were 0.01 mg/kg. Good linearity was obtained within the range of 0.01 - 0.16 mg/L with corelation coefficents of 0. 9998 and 0. 9997, respectively. When the spiked concentrations were 0.01, 0.02 and 0.05 mg/kg, all the recoveries were 70% - 102%. The relative standard derivations were no more than 10%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2009年第5期698-702,共5页
Chinese Journal of Analytical Chemistry
基金
国家质检总局行业标准制定项目(NO.2007B860)资助
关键词
气相色谱
气相色谱-质谱
乙草胺
食品
基质效应
Gas Chromatography, gas chromatography-mass spectrometry, acetochlor, food, matrix-induced effect
