Zang Xiaohuan, Chang Qingyun, Pang Yachao, Wang Ling, Zhang Shuaihua, Wang Chun, Wang Zhi
Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China.
Food Chem. 2021 Oct 15;359:129984. doi: 10.1016/j.foodchem.2021.129984. Epub 2021 Apr 29.
A boron nitride modified multiwalled carbon nanotube material (BN@MWCNTs) was synthesized, and the synthesis conditions were optimized. The BN@MWCNTs was then used as the SPME fiber coating adsorbent for the extraction of eleven organochlorine pesticides (OCPs) from fruit and vegetable samples. Under the optimal conditions, the SPME coupled with the detection by GC-ECD had a linear response for the determination of the target analytes in the range of 0.03 to 200 ng g with the coefficients of determination (r) ≥ 0.9977. Based on the signal-to-noise ratios of 3 and 10, the limits of detection and the limits of quantification were measured to be 0.01-0.20 ng g and 0.03-0.67 ng g, respectively. The relative recoveries of the analytes for spiked samples under three concentration levels (1.0, 10.0 and 100 ng g) were between 83.7% and 124% with the relative standard deviations ≤ 10.9%. The established method was successfully applied to the determination of OCPs in real fruit and vegetable samples.
合成了一种氮化硼修饰的多壁碳纳米管材料（BN@MWCNTs），并对合成条件进行了优化。然后将BN@MWCNTs用作固相微萃取纤维涂层吸附剂，用于从水果和蔬菜样品中萃取11种有机氯农药（OCPs）。在最佳条件下，固相微萃取结合气相色谱 - 电子捕获检测器检测，目标分析物的测定线性响应范围为0.03至200 ng g，测定系数（r）≥0.9977。基于3和10的信噪比，测得检测限和定量限分别为0.01 - 0.20 ng g和0.03 - 0.67 ng g。在三个浓度水平（1.0、10.0和100 ng g）下加标样品中分析物的相对回收率在83.7%至124%之间，相对标准偏差≤10.9%。所建立的方法成功应用于实际水果和蔬菜样品中OCPs的测定。
