Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1987-02-10
1990-10-16
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
204403, 2041531, 20415321, 324438, 435 4, G01N 2707, G01N 2756, G01N 2127
Patent
active
049638157
ABSTRACT:
Devices and methods are provided for determining the presence and amount of an analyte by measuring a redox potential-modulated photoinducing signal from a photoresponsive element. Further devices and methods are provided for determining the presence and amount of an analyte by measuring a redox potential, pH or ion modulated photoinduced signal from a photoresponsive element, where one signal is a constant system and the other signal(s) is a variable system. The constant system signal is used to standardize the variable system signal. Various protocols may be employed where an analyte may be directly or indirectly coupled to a redox couple, a pH or ion system for detection. The latter devices employ a photoresponsive element having a medium contacting surface, which is partially covered with an electronically conducting layer and partially covered with a protective insulative layer.
REFERENCES:
patent: 3825483 (1974-07-01), Nakamura
patent: 4020830 (1977-05-01), Johnson et al.
patent: 4562157 (1985-12-01), Lowe et al.
patent: 4591550 (1986-05-01), Hafeman et al.
patent: 4704353 (1987-11-01), Humphries et al.
Eisenzopf Reinhard J.
Molecular Devices Corporation
Mueller Robert W.
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