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    • 3. 发明授权
    • Method of determining the portion of an electrochemically convertible
substance in a gas sample
    • 确定气体样品中电化学转化物质部分的方法
    • US5726906A
    • 1998-03-10
    • US560486
    • 1995-11-17
    • Hans MatthiessenGero Sagasser
    • Hans MatthiessenGero Sagasser
    • G01N27/49G01N33/00G01N33/497G06G7/19
    • G01N27/4045G01N33/4972
    • A method for determining the portion of an electrochemically detectable substance in a gas sample includes the steps of introducing the gas sample into an electrochemical measuring cell 1 and generating a measurement curve i(t) by the electrochemical conversion of the substance in the measuring cell 1. The measuring curve i(t) increases from a reference line to a maximum value i.sub.max and drops back again to the reference line. Then, the maximum value i.sub.max and an area A below the measuring curve i(t) are determined. The area A is proportional to the portion of the substance in the gas sample. The method is improved in that a new measurement value is made available after a short time. This is achieved in that the maximum value i.sub.n max and the area A.sub.n of a previous measurement are compared to each other and a proportionality factor K.sub.n is determined. The proportionality factor K.sub.n is given by the ratio of the area A.sub.n to the maximum value i.sub.n max and, for a new measurement, a new maximum value i.sub.n+1 max is determined and the portion of the substance in the gas sample is computed for the new measurement from the new maximum value i.sub.n+1 max and the proportionality factor K.sub.n of the previous measurement.
    • 一种用于确定气体样品中电化学检测物质部分的方法包括以下步骤:将气体样品引入电化学测量池1中,并通过测量池1中物质的电化学转化产生测量曲线i(t) 测量曲线i(t)从参考线增加到最大值imax,并再次下降到参考线。 然后,确定最大值imax和低于测量曲线i(t)的面积A. 区域A与气体样品中物质的部分成比例。 该方法得到改进,因为在短时间后可获得新的测量值。 这是通过将先前测量中的最大值和最大值A a彼此进行比较并确定比例因子Kn来实现的。 比例因子Kn由面积A A与最大值的比值给出,对于新的测量,确定+ 1 max中的新最大值,并计算气体样品中物质的部分 从+ 1 max的新最大值和先前测量的比例因子Kn开始的新测量。
    • 4. 发明授权
    • Electrochemical multigas sensor
    • 电化学multigas传感器
    • US5932079A
    • 1999-08-03
    • US987206
    • 1997-12-09
    • Stephan HauptChristoph BernsteinGero SagasserJohannes Lagois
    • Stephan HauptChristoph BernsteinGero SagasserJohannes Lagois
    • G01N27/49G01N27/26
    • G01N27/4045
    • An electrochemical measuring cell for the simultaneous detection of different gas components in a gas sample, with a plurality of measuring electrodes (4, 5, 6) behind a diffusion barrier (7), with a common reference electrode (8) and counterelectrode (9) in an acid electrolyte, and with a potentiostatic evaluating circuit. Improvements in terms of service life for a sensor for the simultaneous detection of oxygen and carbon monoxide is provided with a reference electrode formed of a sintered mixture of metal and its metal oxide, preferably from the platinum group, the iridium group or gold and the potential of the CO-measuring electrode (5) relative to the reference electrode (8) is set at about 0 to 300 mV, and that of the O.sub.2 -measuring electrode (4) is set at a value between -300 and -800 mV.
    • 一种用于同时检测气体样品中不同气体组分的电化学测量单元,其具有在扩散阻挡层(7)后面的多个测量电极(4,5,6),具有公共参考电极(8)和反电极(9 )在酸性电解质中,并具有恒电位评估电路。 用于同时检测氧气和一氧化碳的传感器的使用寿命方面的改进提供了由金属和其金属氧化物的烧结混合物形成的参比电极,优选由铂族,铱基或金形成的电极和电位 相对于参考电极(8)的CO测量电极(5)设定为约0〜300mV,将O 2测量电极(4)设定为-300〜-800mV。