ZnS量子点修饰的玻碳电极电化学法测定废水中的磺胺二甲嘧啶
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摘要
目的建立测定废水中磺胺二甲嘧啶的ZnS量子点修饰的玻碳电极电化学法。方法采用水相化学共沉淀法合成ZnS量子点,循环伏安法研究磺胺二甲嘧啶在ZnS量子点修饰的玻碳电极上的电化学性质,差分脉冲伏安法建立磺胺二甲嘧啶的电化学测定方法。结果水相化学共沉淀法合成的ZnS量子点有较强的荧光。ZnS量子点修饰的玻碳电极在p H 1.98的B-R缓冲液中,产生1个氧化峰,峰电位为1.0 V。当浓度范围为0.2~10μmol/L时,磺胺二甲嘧啶的峰电流与其浓度呈良好的线性关系,线性方程为Ipa=0.647 9 c+0.074 98,r=0.999 1,检测限为0.06μmol/L,加样回收率在100.7%~103.1%之间。结论 ZnS量子点修饰的玻碳电极对磺胺二甲嘧啶有较好的电化学响应,响应快、灵敏度高,可用于测定废水中残留的磺胺二甲嘧啶。
Objective To establish the electrochemical determination of sulfamethazine with ZnS quantum dots modified glassy carbon electrode. Methods ZnS quantum dots were synthesized with water phase chemical co-precipitation method,and the electrochemical properties of Sulfamethazine at ZnS quantum dots modified glassy carbon electrode were studied with the cyclic voltammetry. The electrochemical method for the determination of sulfamethazine was developed by differential pulse voltammetry. Results ZnS quantum dots synthesized by aqueous coprecipitation had strong fluorescence. In B-R buffer solution at p H 1.98,the ZnS quantum dots modified glassy carbon electrode exhibited better electrocatalytic effect toward the oxidation of Sulfamethazine,and the oxidation peak of Sulfamethazine was at 1.0 V. The peak current had a good linear relationship with the Sulfamethazine concentration from 0.2-10 μmol/L,the linear equation was Ipa= 0.647 9 c+ 0.074 98 with the correlation coefficient of 0.999 1,and the detection limit was 0.06 μmol/L.The recoveries of sulfonamides in wastewater samples ranged from 100.7% to 103.1%. Conclusion The ZnS quantum dots modified glassy carbon electrode has good electrochemical response, fast response and higher sensitivity. It has been applied to the determination of sulfamethazine in wastewater with satisfactory results.
Objective To establish the electrochemical determination of sulfamethazine with ZnS quantum dots modified glassy carbon electrode. Methods ZnS quantum dots were synthesized with water phase chemical co-precipitation method,and the electrochemical properties of Sulfamethazine at ZnS quantum dots modified glassy carbon electrode were studied with the cyclic voltammetry. The electrochemical method for the determination of sulfamethazine was developed by differential pulse voltammetry. Results ZnS quantum dots synthesized by aqueous coprecipitation had strong fluorescence. In B-R buffer solution at p H 1.98,the ZnS quantum dots modified glassy carbon electrode exhibited better electrocatalytic effect toward the oxidation of Sulfamethazine,and the oxidation peak of Sulfamethazine was at 1.0 V. The peak current had a good linear relationship with the Sulfamethazine concentration from 0.2-10 μmol/L,the linear equation was Ipa= 0.647 9 c+ 0.074 98 with the correlation coefficient of 0.999 1,and the detection limit was 0.06 μmol/L.The recoveries of sulfonamides in wastewater samples ranged from 100.7% to 103.1%. Conclusion The ZnS quantum dots modified glassy carbon electrode has good electrochemical response, fast response and higher sensitivity. It has been applied to the determination of sulfamethazine in wastewater with satisfactory results.
引文
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[2]赵晓凤,杨中.气相色谱-串联质谱法检测猪肉组织中的磺胺二甲嘧啶残留量[J].饲料工业,2007,28(2):54-57.
[3]杨祖英,金社胜,刘文娟,等.高效液相色谱法测定鸡肉中磺胺二甲嘧啶、磺胺甲噁唑[J].卫生研究,2003,32(6):625-627.
[4]刘思洁,战英,李青,等.高效液相色谱法测定动物性食品中的磺胺二甲嘧啶残留量[J].中国卫生工程学,2006,5(1):41-42.
[5]韩斯琴高娃,包琳,陈炳伟,等.SERS检测牛奶中磺胺二甲嘧啶[J].食品与药品,2016,18(3):161-165.
[6]龚云飞,王唯芬,张明洲,等.禽类食品中磺胺二甲嘧啶间接竞争ELISA检测方法的建立[J].中国畜牧兽医,2011,38(6):55-59.
[7]PRADA G V,REVIEJO A J,PINGARRóN J M.A method for the quantification of low concentration sulfamethazine residues in milk based on molecularly imprinted clean-up and surface preconcentration at a Nafion-modified glassy carbon electrode[J].Pharm Biomed Anal,2006,40(2):281-286.
[8]MARTYNENKO I V,LITVIN A P,PURCELL F,et al.Application of semiconductor quantum dots in bioimaging and biosensing[J].J Mater Chem B,2017,5(33):6701-6727.
[9]ZHOU Weidong,COLEMAN J J.Semiconductor quantum dots[J].Curr Opin Solid State Mater Sci,2016,20(6):352-360.
[10]KUNETS V P,DIAS M R S,REMBERT T,et al.Electron transport in quantum dot chains:Dimensionality effects and hopping conductance[J].Appl Phys,2013,113(18):1-7.
[11]QIN Wei,LI Dongsheng,ZHANG Xiaojie,et al.Zn S nanoparticles embedded in reduced graphene oxide as high performance anode material of sodium-ion batteries[J].Electrochim Acta,2016,191:435-443.
[12]ZHANG Yue,YU Meiyan.One pot synthesis and characterization of Zn S nanoparticles in the mixed surfactant system[J].Mater Chem Phys,2014,145(1/2):197-202.
[13]DOURI Y A,VERMA K D,PRAKASH D.Optical investigations of blue shift in Zn S quantum dots[J].Superlattices Microstruct,2015,88:662-667.
[14]NAGAMANI K,REVATHI N,PRATHAP P,et al.Al-doped Zn S layers synthesized by solution growth method[J].Curr Appl Phys,2012,12(2):380-384.
[15]HERRERA-HERRERA A V,HERNANDEZ-BORGES J,BORGES-MIQUEL T M,et al.Dispersive liquid-liquid microextraction combined with ultra-high performance liquid chromatography for the simultaneous determination of 25sulfonamide and quinolone antibiotics in water samples[J].J Pharm Biomed Anal,2013,75(5):130-137.
[16]LAVIRON E.A multilayer model for the study of space distributed redox modified electrodes.Part I.Description and discussion of the model[J].J Electroanal Chem,1980,112(1):1-9.
[17]BARD A J,FAULKNER L R.Electrochemical methods:fundamentals and applications/Allen J.Bard,Larry R.Faulkner[J].J Chem Educ,1980,60(1):669-676.
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