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首页> 外文期刊>IEEE sensors journal >The Novel Carbon Nanomaterials Electrochemical Sensor for Determination of Trace Aluminum in Human Body Fluids With 8-Hydroxyquinoline
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The Novel Carbon Nanomaterials Electrochemical Sensor for Determination of Trace Aluminum in Human Body Fluids With 8-Hydroxyquinoline

机译：新型碳纳米材料电化学传感器，用于8-羟基喹啉测定人体液体中的痕量铝

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摘要

The novel carbon materials modified electrodes are prepared by multi-walled carbon nanotubes (MWNTs) and chemical reduced graphene (CRG) nanosheets. The modified electrodes can detect aluminum(III) in biological samples using 8-hydroxyquinoline (8-HQ) as a sequestering agent. The modified electrodes are characterized by cyclic voltammetry, transmission electron microscopy, and infrared spectrum. The electrochemical behaviors of 8-HQ with and without aluminum at the modified electrodes are investigated by linear scan voltammetry (LSV). The experimental results show the electrochemical activities of the new carbon material modified electrode that are improved greatly and compared with the bare glassy carbon electrode. This novel method is based on the property that LSV anodic peak current of 8-HQ decreases linearly when the concentration of aluminum increases. Under the optimum experimental conditions (pH7.5, 0.1 mol/L Tris-HCl buffer solution, and $2times 10^{-4}~{rm mol}/{rm L}$ 8-HQ), the linear range and detection limit are $7times 10^{-7}~{rm mol}/{rm L}-8times 10^{-6}~{rm mol}/{rm L}$, $3.1times 10^{-7}~{rm mol}/{rm L}$ for CRG and $7times 10^{-7}~{rm mol}/{rm L}-8times 10^{-6}~{rm mol}/{rm L}$, $1.7times 10^{-7}~{rm mol}/{rm L}$ for MWNT, with $5times 10^{-6}~{rm mol}/{rm L}$ Al(III). Eight measurements are carried out for each modified electrode, and the relative standard deviation of the results is found to be 2.4% (MWNT) and 3.2% (CRG), respectively. The modified electrode exhibits good stability and is used to detect aluminum concentration in - iological fluids, including human serum and cerebrospinal fluid. The recoveries are 87.5%–90.0% for CRG and 92.5%–95.0% for MWNT, respectively.
机译：新型碳材料修饰电极是通过多壁碳纳米管（MWNT）和化学还原石墨烯（CRG）纳米片制备的。修饰的电极可以使用8-羟基喹啉（8-HQ）作为螯合剂来检测生物样品中的铝（III）。改性电极通过循环伏安法，透射电子显微镜和红外光谱进行表征。通过线性扫描伏安法（LSV）研究了8-HQ在有和没有铝的情况下在修饰电极上的电化学行为。实验结果表明，与裸玻璃碳电极相比，新型碳材料修饰电极的电化学活性得到了很大的提高。该新方法基于以下特性：当铝的浓度增加时，8-HQ的LSV阳极峰值电流线性减小。在最佳实验条件下（pH7.5、0.1 mol / L Tris-HCl缓冲溶液和<配方公式type =“ inline”> $ 2乘以10 ^ {-4}〜{rm mol} / {rm L} $ 8-HQ），线性范围和检测极限为 $ 7×10 ^ {-7} 〜{rm mol} / {rm L} -8乘以10 ^ {-6}〜{rm mol} / {rm L} $ ， $ 3.1乘以10 ^ {-7}〜{rm mol} / {rm L} $ 用于CRG和 $ 7乘以10 ^ {-7}〜{rm mol} / {rm L} -8乘以10 ^ {-6}〜{rm mol} / {rm L} $ ，<公式Formulatype = “ inline“> $ 1.7乘以MWNT的10 ^ {-7}〜{rm mol} / {rm L} $ ，其中 $ 5乘以10 ^ {-6}〜{rm mol} / {rm L} $

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