• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >Silver/Bismuth/Nafion Modified Pencil Graphite Electrode for Trace Heavy Metal Determination
【24h】

Silver/Bismuth/Nafion Modified Pencil Graphite Electrode for Trace Heavy Metal Determination

机译：银/铋/纳米改性铅笔石墨电极用于痕量重金属的测定

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

摘要

A low–cost modified pencil graphite electrode (PGE) was developed for the determination of traceheavy metals in wastewater. Graphite rods (2HB) of 3 mm diameter from a commercial brand ofpencils were modified by varying amounts of silver nanoparticles (AgNP) and bismuth (Bi) mixed in asolution of 1% Nafion? and isopropanol via the drop coating technique. The PGE modified by 3 mgAgNP and 2 mg Bismuth was deemed the best electrode as it yielded the highest anodic peaks asdetermined by anodic stripping voltammetry (ASV). By optimizing the ASV parameters, it wasdetermined that the optimum accumulation time and deposition time are 120s and 15s, respectively.The calibration curve was used to determine the limits of detection which were 0.19 parts per billion(ppb) for Cd2+ and 0.30 ppb for Pb2+ while the limits of quantitation were 568 ppb for Cd2+ and 894ppb for Pb2+. The Pearson coefficients of the calibration plots of Cd2+ and Pb2+ are 0.9822 and 0.9569,respectively. Wastewater samples were collected and analyzed for trace heavy metals using theoptimized electrode.
机译：开发了一种低成本的改性铅笔状石墨电极（PGE），用于测定废水中的痕量重金属。通过改变在1％Nafion？溶液中混合的银纳米颗粒（AgNP）和铋（Bi）的量来修饰商品品牌铅笔的直径3 mm的石墨棒（2HB）。和异丙醇通过滴涂技术。经3 mgAgNP和2 mg铋修饰的PGE被认为是最好的电极，因为它产生的最高阳极峰由阳极溶出伏安法（ASV）确定。通过优化ASV参数，确定最佳累积时间分别为120s和15s。使用校准曲线确定检测限，Cd2 +的检测限为十亿分之十亿（ppb），Pb2 +的检测限为十亿分之0.30 ppb。 Cd2 +的定量限为568 ppb，Pb2 +的定量限为894ppb。 Cd2 +和Pb2 +的校正图的皮尔逊系数分别为0.9822和0.9569。收集废水样品，并使用优化的电极分析痕量重金属。

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