磁性固相萃取-原子吸收法测定葛仙米中的Cu2+  

Determination of Cu2+ in Nostoc Sphaeroides by Magnetic Solid Phase Extraction-atomic Absorption Spectrophotometry

作　　者：张帆[1,2] 喻念念 张莹[2] Zhang Fan;Yu Nian-nian;Zhang Ying(Changsha Environmental Protection College,Hunan Changsha 410004;Hunan Academy of Science and Technology for Inspection and Quarantine,Hunan Changsha 410004)

机构地区：[1]长沙环境保护职业技术学院,湖南长沙410004 [2]湖南省检验检疫科学技术研究院,湖南长沙410004

出　　处：《生物化工》2020年第1期88-90,共3页Biological Chemical Engineering

基　　金：2017湖南省自然科学基金项目（2017JJ5058）;湖南省教育厅科学研究项目（16C0020）;湖南环保科技项目（湘财建字﹝2016﹞59号）

摘　　要：目的:建立磁性固相萃取-原子吸收法测定葛仙米中Cu^2+的分析方法。方法:实验合成的磁性碳纳米管吸附性和分散性较好,形态结构通过透射电镜进行表征。对经消解的葛仙米样品溶液中的Cu^2+进行富集和分离,磁性多壁碳纳米管表现出对Cu^2+较强的选择性吸附能力,从而能够获得较低的检测限。结果:Cu^2+在0.5~4.0 mg/L范围内,线性关系良好,相关系数均大于0.999;Cu^2+在线性范围内的添加回收实验,平均回收率为93.5%~95.0%,RSD为3.6%~4.9%,能够满足葛仙米中Cu^2+的检测需要。结论:与其他分析仪器相比,利用火焰原子吸收光谱仪来测定葛仙米中痕量的的Cu^2+,分析速度快,成本相对较低。Objective:Established a method to analysis Cu^2+in Nostoc sphaeroides by magnetic solid phase extraction-atomic absorption spectrophotometry.Methods:The magnetic MWCNTs prepared have a better dispersion,adsorption capacity were characterized by transmission electron microscopy.Based on the strong selective adsorption ability to Cu^2+,magnetic MWCNTs could effectively enrich and separate copper from Nostoc sphaeroides.Results:a good linear correlation with the coefficients greater than 0.999 when the Cu^2+in the range of 0.5~4.0 mg/L;the average recovery of these three irons was 93.5%~95.0%with the RSD of 3.6%~4.9%within the linear range,which fully meet the Cu^2+testing needs in Nostoc sphaeroides.Conclusion:the flame atomic absorption spectrometer could be used to detect trace amounts of Cu^2+in Nostoc sphaeroides with faster speed and lower cost compared with other analytical instruments.

关 键 词：磁性固相萃取 原子吸收 葛仙米 CU^2+ 

分 类 号：X836[环境科学与工程—环境工程]