College of Science, Hebei Agricultural University, Baoding, China.
College of Landscape and Travel, Hebei Agricultural University, Baoding, China.
J Sep Sci. 2018 Apr;41(7):1539-1547. doi: 10.1002/jssc.201701197. Epub 2018 Jan 31.
In this work, a magnetic β-cyclodextrin polymer was successfully prepared and used as an adsorbent for the magnetic solid-phase extraction of six benzoylurea insecticides (diflubenzuron, triflumuron, hexaflumuron, teflubenzuron, flufenoxuron, and chlorfluazuron) from honey, tomato, and environmental water samples. The influence of the main experimental conditions on the extraction was studied. Under the optimized conditions, the β-cyclodextrin polymer@Fe O showed an excellent extraction performance for the benzoylurea insecticides. A good linearity was obtained for the analytes in the range of 3.0-800 ng/g for honey samples, 0.3-160 ng/g for tomato samples, and 0.1-80.0 ng/mL for water samples, with the correlation coefficients above 0.9998. Satisfactory repeatabilities were achieved, with the relative standard deviations less than 5.7%. The limits of detection (S/N = 3) of the method for the benzoylurea insecticides were 0.2-0.8 ng/g for honey samples, 0.04-0.10 ng/g for tomato samples, and 0.02-0.05 ng /mL for water samples. The method was successfully used for the determination of the six benzoylurea insecticides residues in honey, tomato, and environmental water samples with a satisfactory result.
在这项工作中，成功制备了一种磁性 β-环糊精聚合物，并将其用作吸附剂，用于从蜂蜜、番茄和环境水样中磁性固相萃取六种苯甲酰脲类杀虫剂（除虫脲、伏虫隆、氟铃脲、噻虫嗪、氟虫脲和氯氟脲）。研究了主要实验条件对萃取的影响。在优化条件下，β-环糊精聚合物@Fe3O4 对苯甲酰脲类杀虫剂表现出优异的萃取性能。在蜂蜜样品中，分析物的线性范围为 3.0-800ng/g，在番茄样品中为 0.3-160ng/g，在水样中为 0.1-80.0ng/mL，相关系数均大于 0.9998。获得了令人满意的重复性，相对标准偏差小于 5.7%。该方法对蜂蜜样品中苯甲酰脲类杀虫剂的检出限（S/N=3）为 0.2-0.8ng/g，对番茄样品中的检出限为 0.04-0.10ng/g，对水样中的检出限为 0.02-0.05ng/mL。该方法成功用于蜂蜜、番茄和环境水样中六种苯甲酰脲类杀虫剂残留的测定，结果令人满意。
