氨基键合磁性硅球的制备及其对铜离子的萃取性能

氨基键合磁性硅球的制备及其对铜离子的萃取性能 Preparation of Amino Modified Magnetic Silica Particles and Their Application in the Enrichment of Trace Amounts of Copper Ion 龙涛 LONG Tao 1 first-author 黄莹莹 HUANG Yingying 1 彭显威 PENG Xianwei 1 徐兰英 XU Lanying 1 黄冈师范学院 经济林木种质改良与资源综合利用湖北省重点实验室 黄冈师范学院 经济林木种质改良与资源综合利用湖北省重点实验室 Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Huanggang Normal University,Huangzhou Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Huanggang Normal University,Huangzhou 采用共沉淀法制备了磁性Fe3O4颗粒,在其表面包覆一层SiO2后,利用3-氨丙基三甲氧基硅烷对其表面进行修饰,制备了氨基键合磁性硅球（NH2-Fe3O4/SiO2）,并表征了材料的表面功能基团、形态、粒径分布以及磁性特质.将该磁性硅球作为磁固相萃取（MSPE）材料,与火焰原子吸收光谱法（FAAS）联用,建立了环境水样中铜离子的定量分析方法.该方法检出限为0.50ng/mL,定量限为1.66ng/mL.该方法用于长江水中铜离子的分析,加标回收率为85.6%,相对标准偏差为8.2%. This paper prepared Fe3O4 microspheres by co-precipitation method,after coating with a layer of silica on their surface,magnetic silica particles were resulted.The obtained magnetic silica particles were modified with 3-aminopropyl trimethoxysilane to obtain composite materials（NH2-Fe3O4/SiO2）.The resultant sorbent materials were characterized by some methods to research their feature,such as surface functional groups,morphology,particle size distribution and magnetic properties and so on.The synthesized NH2-Fe3O4/SiO2 mirospheres were used as magnetic solid-phase extraction materials,coupled with flame atomic absorption spectrometry（FAAS） to quantitative detection of copper ion in water samples.The limit of detection is 0.50 ng/mL and the limit of the quantitation is 1.66 ng/mL.Finally,the method was successfully applied to analyze copper ions in Changjiang river,the recovery is 85.6% and the relative standard deviation is 8.2%. 磁固相萃取 火焰原子吸收光谱 铜离子 萃取 magnetic solid-phase extraction flame atomic absroption spectrometry copper ion extraction 10.14188/j.1671-8836.2013.04.006 X832 国家自然科学基金（21205046）;湖北省自然科学基金（2012FFC035）;湖北省教育厅科学技术研究计划项目（B20122701）;经济林木种质改良与资源综合利用湖北省重点实验室开放基金（2013001603）资助项目 2013-04-01 2021-04-01 4 59