Method of determining the portion of an electrochemically conver

Details Method of determining the portion of an electrochemically conver Method of determining the portion of an electrochemically conver

1995-11-17

1998-03-10

Trammell, James P.

Boots, shoes, and leggings

73 1901, G06G 719

Patent

active

057269068

ABSTRACT:
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.

REFERENCES:
patent: 4770026 (1988-09-01), Wolf
patent: 5048321 (1991-09-01), Chow
patent: 5612896 (1997-03-01), Stock

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