基于单层二硫化钨-多壁碳纳米管电化学传感器的构建及其对猕猴桃中多菌灵的检测研究
发布时间：2018-10-17 20:48
【摘要】：以二硫化钨(WS2)和氨基功能化多壁碳纳米管(f MWCNTs)为原料,通过滴涂法制备二硫化钨-碳纳米管/玻碳电极(WS2-f MWCNTs/GCE)复合传感器,对猕猴桃中多菌灵(MBC)的超高灵敏检测。采用电化学循环伏安法(CV)对电极进行表征,并采用CV考察MBC在不同电极上的电化学氧化还原行为,建立差分脉冲法(DPV)传感检测MBC的新方法。实验结果表明多菌灵在1.0×10~(-7)~1.0×10~(-5)mol/L浓度呈现良好的线性关系,检测限为(LOD)为1.1×10~(-8)mol/L(S/N=3),定量限为3.7×10-8mol/L(S/N=10)。在对实际样品猕猴桃检测时,添加不同浓度多菌灵的加标回收率为89.0%~102%。此方法对实际样品猕猴桃中多菌灵检测具有良好的重现性和超高灵敏度。
[Abstract]:Tungsten disulfide (WS2) and amino-functionalized multiwalled carbon nanotubes (f MWCNTs) were used as raw materials to prepare tungsten disulfide / carbon nanotube / glassy carbon electrode (WS2-f MWCNTs/GCE) composite sensor by drip coating method to detect carbendazim (MBC) in kiwifruit. Electrochemical cyclic voltammetry (CV) was used to characterize the electrode and CV was used to investigate the electrochemical redox behavior of MBC on different electrodes. A new method for detecting MBC by differential pulse (DPV) sensing was established. The results showed that carbendazim showed a good linear relationship between 1.0 脳 10 ~ (-7) ~ 1.0 脳 10 ~ (-5) mol/L, the detection limit was 1.1 脳 10 ~ (-8) mol/L (S/N=3) and the quantitative limit was 3.7 脳 10-8mol/L (S/N=10). In the detection of kiwifruit samples, the recovery rate of adding different concentrations of carbendazim was 89. 0 and 102. This method has good reproducibility and high sensitivity for the detection of carbendazim in kiwifruit.
【作者单位】： 江西农业大学理学院化学系;江西省果蔬采后处理关键技术与质量安全协同创新中心;
【基金】：国家自然科学基金(31660492) 国家博士后面上项目(2015M571987) 江西省博士后择优资助项目(2015KY44) 大学生创新创业训练计划项目(20151041007)~~
【分类号】：O657.1;TS255.7
，
本文编号：2277927
[Abstract]:Tungsten disulfide (WS2) and amino-functionalized multiwalled carbon nanotubes (f MWCNTs) were used as raw materials to prepare tungsten disulfide / carbon nanotube / glassy carbon electrode (WS2-f MWCNTs/GCE) composite sensor by drip coating method to detect carbendazim (MBC) in kiwifruit. Electrochemical cyclic voltammetry (CV) was used to characterize the electrode and CV was used to investigate the electrochemical redox behavior of MBC on different electrodes. A new method for detecting MBC by differential pulse (DPV) sensing was established. The results showed that carbendazim showed a good linear relationship between 1.0 脳 10 ~ (-7) ~ 1.0 脳 10 ~ (-5) mol/L, the detection limit was 1.1 脳 10 ~ (-8) mol/L (S/N=3) and the quantitative limit was 3.7 脳 10-8mol/L (S/N=10). In the detection of kiwifruit samples, the recovery rate of adding different concentrations of carbendazim was 89. 0 and 102. This method has good reproducibility and high sensitivity for the detection of carbendazim in kiwifruit.
【作者单位】： 江西农业大学理学院化学系;江西省果蔬采后处理关键技术与质量安全协同创新中心;
【基金】：国家自然科学基金(31660492) 国家博士后面上项目(2015M571987) 江西省博士后择优资助项目(2015KY44) 大学生创新创业训练计划项目(20151041007)~~
【分类号】：O657.1;TS255.7
，
本文编号：2277927
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