摘要
以刻蚀不锈钢丝为基体,采用化学沉积法在表面沉积金纳米粒子（AuNPs）,修饰一层1,8-辛二硫醇分子后,再自组装一层AuNPs,制备了高强度AuNPs涂层固相微萃取（ SPME）纤维,并与HPLC联用,以常用紫外线吸收剂为例,评价了AuNPs-SPME纤维的萃取分离性能。当萃取时间为30 min、温度为55℃、搅拌速率为800 r/min, pH=7时,萃取效果最好。在优化的萃取条件下,所建立的AuNPs-SPME-HPLC法测定4种紫外吸收剂（2-羟基-4-甲氧基二苯甲酮、2-乙基己基-4-（N,N-二甲氨基）苯甲酸酯、2-乙基己基-4-甲氧基肉桂酸酯和2-乙基己基水杨酸）的线性范围为0.004~200μg/L,检出限为0.43~570 ng/L （S/N=3）,相对标准偏差（RSD）在1.9%~4.2%（n=5）之间。河水、废水处理厂的废水以及雨水样品中紫外线吸收剂的加标回收率在77.9%~108%之间,RSD为3.1%~8.0%（n=5）。
Self-assembled gold nanoparticles （ AuNPs） coating was fabricated using an etched stainless steel wire as a support on which AuNPs were first deposited, then after modified with mercaptan, another layer of AuNPs was self-assembled. The AuNPs modified stainless steel wire was used in solid phase microextraction （SPME） coupled with high performance liquid chromatography （HPLC） for the determination of ultraviolet （ UV） filters in environmental water. The best extraction efficiencies were achieved within 30 min at 55℃ and at pH 7 with stirring rate of 800 r/min. Under the optimized conditions, the established AuNPs-SPME-HPLC method for the determination of UV filters benzophnone-3 （ BP-3 ） , 2-ethylhexyl-4-（ N, N-dimethylamino ） benzoate （ OD-PABA） , 2-ethylhexyl-4-trimethoxycinnamate （ EHMC） and 2-ethylhexyl salicylate （ EHS） was linear in the range of 0. 004-200 μg/L. The limits of detection of the method were 0. 43-570 ng/L （ S/N=3 ） . The relative standard deviation （ RSD ） of AuNPs-SPME-HPLC was 1 . 9%-4 . 2% （ n=5 ） for spiked water samples of 20 μg/L each UV filter. In the case of real water samples analyses, the recoveries of spiked UV filters were 77 . 9%-108% with RSDs of 3 . 1%-8 . 0% （ n=5 ） .
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2015年第2期207-211,共5页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金(No.21265019)资助项目~~
关键词
金纳米粒子涂层
自组装
固相微萃取
紫外线吸收剂
Gold nanoparticles coating
Self-assembly
Solid-phase microextraction
Ultraviolet filters
