• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Determination of ultra-trace catecholamines based on hot electron-induced cathodic electrochemiluminescence at a naturally oxide-covered tantalum electrode
【24h】

Determination of ultra-trace catecholamines based on hot electron-induced cathodic electrochemiluminescence at a naturally oxide-covered tantalum electrode

机译：基于天然氧化钽电极的热电子诱导的阴极电化学荧光测定超痕量儿茶酚胺

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

摘要

Naturally oxide-covered tantalum electrodes (Ta/Ta _(2) O _(5) ) are first used in the determination of ultra-trace catecholamines based on hot electron-induced cathodic electrochemiluminescence. Under natural conditions, an oxide film can be formed on the surface of tantalum electrode, at which the quenching effect of catecholamines on the hot electron-induced cathodic electrochemiluminescence (cathodic ECL) of luminol is found. Based on this quenching effect, detection of ultra-trace catecholamines is established. No previous anthropogenic modification of the electrode and no derivatization of the catecholamines are required before determination. Under the optimum conditions, the quench ratio is linearly increased with the logarithm of the concentration of epinephrine, dopamine and norepinephrine in the range of 2.0 × 10 ~(?8) mol L ~(?1) to 2.0 × 10 ~(?6) mol L ~(?1) , 8.0 × 10 ~(?9) mol L ~(?1) to 4.0 × 10 ~(?7) mol L ~(?1) and 8.0 × 10 ~(?9) mol L ~(?1) to 8.0 × 10 ~(?7) mol L ~(?1) with the limit of detection (LOD) of 5.5 × 10 ~(?9) mol L ~(?1) to 7.8 × 10 ~(?10) mol L ~(?1) and 8.2 × 10 ~(?10) mol L ~(?1) , respectively.
机译：本土氧化覆盖的钽电极（Ta / Ta _（2）O _（5））首先用于基于热电子诱导的阴极电化学荧光测定超痕量儿茶酚胺。在天然条件下，可以在钽电极的表面上形成氧化物膜，在该钽电极的表面上发现，发现儿茶酚胺对鲁米诺的热电诱导的阴极电化学电化学（阴极ECL）的淬火作用。基于该淬火效应，建立了超痕量儿茶酚胺的检测。在测定之前，不需要对电极的先前的人为改性，并且不需要服用的儿茶酚胺。在最佳条件下，随着肾上腺素，多巴胺和去甲肾上腺素浓度的对数线性增加，在2.0×10〜（？8）摩尔L〜（？1）至2.0×10〜（？6 ）Mol L〜（α1），8.0×10〜（Δ9）摩尔L〜（α1）至4.0×10〜（？7）Mol L〜（α1）和8.0×10〜（？9）摩尔L〜（α1）至8.0×10〜（Δ7）mol l〜（α1），限制5.5×10〜（Δ9）mol l〜（Δ1）至7.8×10 〜（？10）摩尔L〜（α1）和8.2×10〜（？10）摩尔L〜（α1）。

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