Shinger Mahgoub I, Elbashir Abdalla A, Ahmed Hassan El-obid, Aboul-Enein Hassan Y
International University of Africa, Faculty of Science, Chemistry Department, Khartoum, Sudan.
Biomed Chromatogr. 2012 May;26(5):589-93. doi: 10.1002/bmc.1679. Epub 2011 Aug 31.
In this study simultaneous determination of cypermethrin and fenvalerate residues in tomato fruit (Lycopesicon esculentum) grown in Khartoum, Sudan, was carried out using gas chromatography with electron capture detector (GC-ECD). The method was linear in the ranges of 0.075-0.009 and 0.75-0.037 mg/mL for cypermethrin and fenvalerate, respectively. The limits of detection and quantification were found to be 0.003 and 0.01 mg/mL and 0.014, 0. 047 mg/mL for cypermethrin and fenvalerate, respectively. The recoveries of cypermethrin and fenvalerate spiked in tomato were 97 ± 7.5 and 99.5 ± 1.8%, respectively. The kinetic study of the degradation of both pesticides was performed and the ultimate evaluation of the kinetic data revealed a first-order kinetics with respect to the tomato fruit; an explanation was put forward to account for the results.
在本研究中，采用带有电子捕获检测器的气相色谱法（GC-ECD）对苏丹喀土穆种植的番茄果实（番茄）中的氯氰菊酯和氰戊菊酯残留量进行了同时测定。该方法在氯氰菊酯和氰戊菊酯的浓度范围分别为0.075 - 0.009和0.75 - 0.037 mg/mL时呈线性。氯氰菊酯和氰戊菊酯的检测限和定量限分别为0.003和0.01 mg/mL以及0.014、0.047 mg/mL。添加到番茄中的氯氰菊酯和氰戊菊酯的回收率分别为97 ± 7.5%和99.5 ± 1.8%。对两种农药的降解进行了动力学研究，对动力学数据的最终评估表明，相对于番茄果实而言呈现一级动力学；并对结果提出了解释。
