公开(公告)号：US20120279874A1

公开(公告)日：2012-11-08

申请号：US13464700

申请日：2012-05-04

申请人： NATHAN S. LAWRENCE ,  ANDREW MEREDITH

发明人： NATHAN S. LAWRENCE ,  ANDREW MEREDITH

IPC分类号： G01N27/26

CPC分类号： G01N27/30 ,  G01N27/302 ,  G01N27/4167

摘要： A method of measuring pH of aqueous liquid with little or no buffer present uses an electrochemical pH sensor which comprises a plurality of electrodes with a redox active organic compound attached to an electrode and having at least one functional group convertible electrochemically between reduced and oxidized forms with transfer of at least one proton between the compound and surrounding aqueous phase, wherein the compound has at least one substituent group which promotes hydrogen bonding at a said functional group and thereby increases the reaction rate of proton transfer. The substituent group may form an internal hydrogen bond with a redox-convertible group or may enhance polarity to promote electrostatic interaction with water molecules and reduce activation energy. Such an electrochemical sensor may be used for pH measurement in computer controlled equipment for processing an aqueous liquid.

摘要翻译： 一种测量含有很少或不存在缓冲液的含水液体的pH的方法使用电化学pH传感器，其包括多个电极，其具有连接到电极上的氧化还原活性有机化合物，并且具有至少一个在还原和氧化形式之间电化学转化的官能团， 在化合物和周围水相之间转移至少一个质子，其中该化合物具有至少一个在所述官能团上促进氢键的取代基，从而提高质子转移的反应速率。 取代基可以与氧化还原可转换基团形成内部氢键，或者可以提高极性以促进与水分子的静电相互作用并降低活化能。 这种电化学传感器可用于计算机控制的设备中的pH测量，用于处理含水液体。