Yu Xi, Yang Hongshun
Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 117543 Singapore, Singapore; National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China.
Food Science and Technology Programme, c/o Department of Chemistry, National University of Singapore, 117543 Singapore, Singapore; National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, PR China.
Food Chem. 2017 Feb 15;217:303-310. doi: 10.1016/j.foodchem.2016.08.115. Epub 2016 Aug 29.
A detection method using polystyrene-coated magnetic nanoparticles based extraction technique coupled to HPLC was developed for trace amount of pyrethroids residue detection in vegetable matrixes. The recoveries for five kinds of commonly used pyrethroids were in the range of 91.6%-116.2%. The sensitivity and precision of the method were satisfactory with the limits of detection and limits of quantification in the range of 0.0200-0.0392ngg(-1) and 0.072-0.128ngg(-1), respectively. The intra-day and inter-day relative standard deviations for the recoveries of the analytes were lower than 6.8% and 10.7%, respectively. The nanoparticles can be washed and recycled after use. The results indicate that the developed method was efficient, fast, economical and environmentally friendly. The method was successfully applied to detect the pyrethroids residue in ten pairs of commonly consumed organic and conventional fresh vegetables in Singapore. Pyrethroids residue was detected in four kinds of conventional vegetables and one kind of organic vegetable.
建立了一种基于聚苯乙烯包覆磁性纳米颗粒萃取技术与高效液相色谱联用的检测方法，用于检测蔬菜基质中痕量拟除虫菊酯残留。五种常用拟除虫菊酯的回收率在91.6%-116.2%范围内。该方法的灵敏度和精密度令人满意，检测限和定量限分别在0.0200-0.0392ng g(-1)和0.072-0.128ng g(-1)范围内。分析物回收率的日内和日间相对标准偏差分别低于6.8%和10.7%。纳米颗粒使用后可清洗并循环利用。结果表明，所建立的方法高效、快速、经济且环保。该方法成功应用于检测新加坡十对常见消费有机蔬菜和传统新鲜蔬菜中的拟除虫菊酯残留。在四种传统蔬菜和一种有机蔬菜中检测到了拟除虫菊酯残留。
