Tian Miaomiao, Cheng Rongmin, Ye Juanjuan, Liu Xiaoting, Jia Qiong
College of Chemistry, Jilin University, Changchun 130012, PR China.
Food Chem. 2014 Feb 15;145:28-33. doi: 10.1016/j.foodchem.2013.08.029. Epub 2013 Aug 14.
A new ionic liquid (IL)-calixarene coated solid-phase microextraction (SPME) fibre has been synthesized on the surface of quartz fibre by the sol-gel method. The coated fibre has been coupled with gas chromatography-flame ionisation detector (GC-FID) for the determination of triazines in fruit and vegetable samples. The operation parameters including sample volume, extraction time, extraction temperature, desorption time, and sample pH have been investigated and optimised. Under the optimum conditions, the limits of detection of atrazine, simazine, ametryn, and cyanazine based on three times of standard deviations of blank by seven replications are 3.3, 4.4, 8.8, and 13.0 μg kg(-1), respectively. The intra-day and inter-day relative standard deviations are less than 7.2% and 9.9%. The proposed method has been successfully applied to the determination of the four triazines in fruit and vegetable samples and the accuracy is assessed through recovery experiments.
通过溶胶-凝胶法在石英纤维表面合成了一种新型离子液体（IL）-杯芳烃涂层固相微萃取（SPME）纤维。将该涂层纤维与气相色谱-火焰离子化检测器（GC-FID）联用，用于测定水果和蔬菜样品中的三嗪类化合物。研究并优化了包括样品体积、萃取时间、萃取温度、解吸时间和样品pH值在内的操作参数。在最佳条件下，基于七次重复空白的三倍标准偏差，阿特拉津、西玛津、莠灭净和氰草津的检测限分别为3.3、4.4、8.8和13.0 μg kg(-1)。日内和日间相对标准偏差分别小于7.2%和9.9%。该方法已成功应用于水果和蔬菜样品中四种三嗪类化合物的测定，并通过回收率实验评估了准确性。
