摘要
利用气质联用(GC-MS)技术建立了水果中4,6-二硝基邻甲酚(DNOC)的测定方法。以二氯甲烷提取水果样品中DNOC残留,并使用N-(特丁基二甲基硅)-N-甲基三氟乙酰胺对提取DNOC残留进行衍生化,利用GC-MS选择离子模式(SIM)测定残留DNOC衍生化产物,在苹果和梨中DNOC的添加回收率在70%~110%之间,相对标准偏差RSD〈9%(n=10),方法的检出限为10μg/kg。
The method for the determination of 4,6-dinitro-cresol (DNOC) in fruits has been established with GC-MS. Fristly, the residue of DNOC in fruits was extracted with dichloromethane and concentrated to dry under nitrogen, then DNOC was derivated by adding acetonitrile and derivatization reagent N-(t-butyldimethylsilyl)-N methyl-trifluoroacetamide (MTBSTFA). Finally, derivatized DNOC in samples was analyzed by GC-MS with selected-ion monitoring (SIM). The recoveries are from 70% to 110% and quantitative limit is l0 ktg/kg. The RSD is below 9% (n = 10).
出处
《分析试验室》
CAS
CSCD
北大核心
2006年第7期87-89,共3页
Chinese Journal of Analysis Laboratory