摘要
该文制备了石墨烯复合材料并将其包覆于铜丝上作为萃取纤维,利用固相微萃取/气相色谱-电子捕获检测器（GC-ECD）技术,建立了环境水样中有机氯农药六六六残留的直接测定方法。优化了萃取时间、萃取温度、pH值及离子强度等固相微萃取条件。在优化的实验条件下,所制备的纤维对α-六六六、β-六六六、γ-六六六与δ-六六六的加标回收率为76%~120%,单一纤维的相对标准偏差（RSD）为4.8%~7.5%,不同纤维之间的相对标准偏差为4.1%~9.1%。4种不同结构的六六六在0.5~200μg/L范围内具有良好线性,检出限为0.04~0.15μg/L。该方法操作简便、快速、灵敏度高,可用于水样中六六六的检测。
A graphene composite was prepared and coated on the copper wire as extraction fiber.A novel method was developed for the direct measurement of benzene hexachloride（BHC） pesticides residue based on solid-phase microextraction（SPME）-gas chromatography equipped with electron capture detection（GC-ECD）.SPME experimental conditions,including extraction time,extraction temperature,pH and ionic strength were optimized.Under the optimized conditions,the self-made fiber showed superior extraction efficiencies for α-BHC,β-BHC,γ-BHC and δ-BHC in real water samples with recoveries of 76%-120%.The relative standard deviations（RSDs） of single fiber were in the range of 4.8%-7.5%,and the RSDs between different fibers were 4.1%-9.1%.Good linearities were obtained in the range of 0.5-200 μg/L for four BHCs with detection limits of 0.04-0.15 μg/L.The results indicated that the established method was simple,rapid and sensitive,and was suitable for the determination of benzene hexachloride pesticide residues in water samples.
出处
《分析测试学报》
CAS
CSCD
北大核心
2011年第7期734-738,共5页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(20975001)
关键词
石墨烯
固相微萃取
气相色谱
六六六
graphene
solid-phase microextraction
gas chromatography
benzene hexachloride pesticides
