...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Developing a screen-printed graphite–polyurethane composite electrode modified with gold nanoparticles for the voltammetric determination of dopamine
【24h】

Developing a screen-printed graphite–polyurethane composite electrode modified with gold nanoparticles for the voltammetric determination of dopamine

机译：用金纳米粒子改性的丝网印刷石墨 - 聚氨酯复合电极用于伏安法测定多巴胺

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A screen-printed electrode (SPGPUE) was prepared with graphite–polyurethane composite ink containing gold nanoparticles (AuNPs), resulting in a screen-printed graphite–polyurethane composite electrode modified with gold nanoparticles (SPGPUE–AuNPs). Gold nanoparticles were prepared by the citrate method and extracted from the water medium since polyurethane is not compatible with humidity. After extraction to chloroform, they were characterized via transmission electron microscopy (TEM). The presence of gold on the SPGPUE–AuNP surface was confirmed via SEM and EDX analyses, while thermogravimetry revealed the presence of approximately 3.0% (m/m) gold in the composite. An electrochemical pretreatment in 0.10 mol L ~(?1) phosphate buffer (pH 7.0) with successive cycling between ?1.0 V and 1.0 V ( vs. pseudo -Ag/AgCl) under a scan rate of 200 mV s ~(?1) and 150 cycles was required in order to provide a suitable electrochemical response for the voltammetric determination of dopamine. After the optimization of the parameters of differential pulse voltammetry (DPV), an analytical curve was obtained within a linear dynamic range of 0.40–60.0 μmol L ~(?1) and detection limit (LOD) of 1.55 ×10 ~(?8) mol L ~(?1) for dopamine at the SPGPUE–AuNP. A non-modified SPGPUE was used for comparison and a linear range was obtained between 2.0 and 10 μmol L ~(?1) with an LOD of 2.94 × 10 ~(?7) mol L ~(?1) . During the dopamine determination in cerebrospinal synthetic fluid (CSF), recoveries between 89.3 and 103% were achieved. There were no significant interferences from ascorbic acid and uric acid, but some from epinephrine due to the structural similarity.
机译：用含有金纳米粒子（AUNP）的石墨 - 聚氨酯复合墨水制备丝网印刷电极（SPGPUE），得到用金纳米颗粒（SPGPUE-AUNP）改性丝网印刷石墨 - 聚氨酯复合电极。通过柠檬酸酯法制备金纳米颗粒，并从水培养基中萃取，因为聚氨酯与湿度不相容。萃取到氯仿后，通过透射电子显微镜（TEM）表征它们。通过SEM和EDX分析证实了SPGPue-AUNP表面上的金的存在，而热重试图显示在复合材料中存在约3.0％（m / m）金。在0.10mol L〜（α1）磷酸盐缓冲液（pH7.0）中的电化学预处理在扫描速率为200mV S〜（α1）之间的α1.0V和1.0V（与伪-AG / AGCL）之间的连续循环需要150个循环，以便为多巴胺的伏安测定提供合适的电化学响应。在差分脉冲伏安法（DPV）参数的优化之后，在0.40-60.0μmolL〜（α1）的线性动态范围内获得分析曲线，检测限为1.55×10〜（？8）的检测限（LOD）在SPGPUE-AUNP的多巴胺Mol L〜（α1）。使用未修饰的SPGPue进行比较，并且在2.0至10μmolL〜（α1）之间获得线性范围，距离为2.94×10〜（Δ7）摩尔L〜（α1）。在脑脊液合成液（CSF）中的多巴胺测定期间，达到89.3％至103％之间的回收率。抗坏血酸和尿酸没有显着的干扰，但由于结构相似性，一些来自肾上腺素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号