Electro-analytical measuring equipment with measuring cell, comprising integral sensing element and several reference electrodes
First Claim
1. In electro-analytical measuring equipment having at least one measuring cell and an electronic signal processor for selective and rapid determination of the concentration and ion-activity of a stationary or flowing sample solution or of the partial pressure of a sample, the improvement wherein the measuring cell comprises an integral sensor having three sensing elements of chemically similar composition and in constant electrically conductive contact with each other, one of the sensing elements in contact with a sample and the other sensing elements in contact with two different standardizing media and three reference electrodes connected to the electronic signal processor, with one of the reference electrodes in contact with the sample through an internal electrolyte and the other reference electrodes in contact with the standardizing media through two other internal electrolytes.
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Abstract
The present invention relates to electro-analytical measuring equipment for the determination--by means of one or more measuring cells comprising sensing elements of chemical similar composition, being in constant galvanic contact with each other--of the concentration and ion-activity of solutions or of the partial pressure of gases. The sensing elements are in contact with sample or with one or more standardizing media separated in time or space. At least two reference electrodes are in direct or in indirect contact--through electrolite--with sample and standardizing medium. The reference electrodes join, in a given case, to electronic signal processor comprising arithmetic unit calculating, by fault compensation, value of one or more parameters to be measured.
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5 Claims
- 1. In electro-analytical measuring equipment having at least one measuring cell and an electronic signal processor for selective and rapid determination of the concentration and ion-activity of a stationary or flowing sample solution or of the partial pressure of a sample, the improvement wherein the measuring cell comprises an integral sensor having three sensing elements of chemically similar composition and in constant electrically conductive contact with each other, one of the sensing elements in contact with a sample and the other sensing elements in contact with two different standardizing media and three reference electrodes connected to the electronic signal processor, with one of the reference electrodes in contact with the sample through an internal electrolyte and the other reference electrodes in contact with the standardizing media through two other internal electrolytes.
Specification