Fe_3O_4磁性石墨烯分散固相萃取水中的有机氯污染物  

Fe_3O_4 magnetic dispersive solid-phase extraction with graphene for determination of organochlorine pesticides contaminants in water

作　　者：王明雨[1] 苏丽清[2] 张少君[1] 汪昱[3] 

机构地区：[1]山东交通学院船舶与轮机工程学院,山东威海264310 [2]威海市立医院内分泌科,山东威海264200 [3]山东省地方病防治研究所碘缺乏病科,山东济南250014

出　　处：《山东大学学报（工学版）》2017年第4期117-123,共7页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(51609131);山东省自然科学基金资助项目(ZR2014JL038);山东省高等学校科技计划资助项目(J14LD04;J16LA61);威海市科技发展计划资助项目(2016GGX003-1)

摘　　要：开发负载胶束的磁性Fe_3O_4纳米微粒修饰的石墨烯作为新型分散固相萃取材料,并用于水中有机氯的检测。磁性石墨烯由氧化石墨烯和Fe^(2+)通过氧化还原法一步合成,负载阳离子表面活性剂CTAB形成纳米混合胶束作为提取系统。应用本方法分析水中的29种有机氯,检测限达到1.5~5.0 ng/L,样品加标回收率范围在75.22%~97.15%。复重性的相对标准偏差小于9.995%,与传统的固相萃取法相比,方法的灵敏度提高了50~113倍。该方法快速、灵敏、准确,可以同时测定水中多种有机氯农残,适合于大批量样品的测定。A novel dispersive solid-phase extraction（ DSPE） analysis method was established by combining Fe3O4 magnetic nanoparticles modified graphene as absorption material for determination of organochlorine pesticides（ OCPs） in water. Magnetic nanoparticles modified graphene（ MNG） was prepared by graphene oxide and Fe2＋ through redox reaction in one step. Cationic surfactant CTAB was added as micelle forming agent,in which MNG was carrier of mixed micelles extraction system. Mixed micelle modified MNG had higher loading capacity than pure Fe_3O_4 magnetic graphene. This method was applied to detect 29 kinds of OCPs in water. The detection limit was in the range of 1. 5 ~ 5. 0 ng/L. The recovery was ranged from 75. 22% to 97. 15%. The relative standard deviation（ RSD）of repeatability was lower than 9. 995%. As compared with ordinary solid-phase extraction,the sensitivity of newmethod increased 50 ~ 113 times. The method was suitable for simultneous determination of OCPs pesticide residues in water with high accuracy,sensitivity and less pre-treatment time,which was suitable for batch analysis of samples.

关 键 词：有机氯 农药残留 胶束提取 磁性Fe3O4纳米微粒 石墨烯 分散固相萃取 

分 类 号：X832[环境科学与工程—环境工程]