School of Engineering, Andrews University, 8450 E Campus Circle Drive, Berrien Springs, MI 49104, USA.
Department of Computing, Andrews University, 4185 E. Campus Circle Drive, Berrien Springs, MI 49104, USA.
ChemistryOpen. 2021 Aug;10(8):842-847. doi: 10.1002/open.202100151.
Phenolic compounds such as vanillic and p-coumaric acids are pollutants of major concern in the agro-industrial processing, thereby their effective detection in the industrial environment is essential to reduce exposure. Herein, we present the quenching effect of these compounds on the electrochemiluminescence (ECL) of the Ru(bpy) /TPrA (TPrA=tri-n-propylamine) system at a disposable screen-printed carbon electrode. Transient ECL profiles are obtained from multiple video frames following 1.2 V application by a smartphone-based ECL sensor. A wide range of detection was achieved using the sensor with limit of detection of 0.26 μM and 0.68 μM for vanillic and p-coumaric acids, respectively. The estimated quenching constants determined that the quenching efficiency of vanillic acid is at least two-fold that of p-coumaric acid under the current detection conditions. The present ECL quenching approach provided an effective method to detect phenolic compounds using a low-cost, portable smartphone-based ECL sensor.
酚类化合物，如香草酸和对香豆酸，是农业工业加工中主要关注的污染物，因此在工业环境中有效检测这些化合物对于减少暴露至关重要。在这里，我们展示了这些化合物在可重复使用的丝网印刷碳电极上对 Ru(bpy)/TPrA（TPrA=三正丙胺）体系电化学发光（ECL）的猝灭效应。智能手机基 ECL 传感器施加 1.2 V 后，通过多个视频帧获得瞬态 ECL 图谱。使用传感器实现了宽检测范围，香草酸和对香豆酸的检测限分别为 0.26 μM 和 0.68 μM。估计的猝灭常数表明，在当前检测条件下，香草酸的猝灭效率至少是对香豆酸的两倍。本 ECL 猝灭方法为使用低成本、便携式智能手机基 ECL 传感器检测酚类化合物提供了一种有效方法。
