Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1994-01-27
1995-08-29
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415312, 20415314, 2041531, 204418, 204403, 204409, 204435, 204408, 204402, G01N 2726
Patent
active
054457262
ABSTRACT:
Device for prolonging the effective usage time (service life), arrangement and process for minimizing temperature effects in any ion-selective polymer membrane electrode measuring chain (ISPE measuring chain), wherein one solution or both solutions directly adjoining the polymer membrane (outer measuring solution and inner potential drain solution) are saturated or supersaturated with the compounds which normally tend to bleed out; and wherein the isotherm intersection of an ion-selective measuring chain with redox drain elements is optimally located in the middle of the measuring range such that this middle is located at ca. 0 mV.
The device may be used for monitoring of groundwater with opposite changes in the concentrations of nitrate and ammonium, evaluated in a special device, with electronic data processing and intermediate data storage (in RAM pack) at the site of the measurement and data polling as needed to a central unit by telemetry.
REFERENCES:
patent: 4409088 (1983-10-01), Kanno et al.
patent: 5078856 (1992-01-01), Yamaguchi
Bell Bruce F.
Daimler-Benz Aerospace AG
Niebling John
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