Senova Systems, Inc.

Schlumberger Technology Corporation

Oxford University Innovation Limited

Prad Research and Development Nv

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Schlumberger Oilfield Assistance Limited

Gregory George Wildgoose

Eric A Lee

Lee Leonard

Joseph A Duimstra

Nathan Scott Lawrence

Richard Guy Compton

Oliver Clinton Mullins

Li Jiang

Timothy Gareth John Jones

Andrew Meredith

Mark Micklatcher

Sean P McCormack

Victor Simonyi

Malingappagari Pandurangappa

Anton Seidl

Joseph I Keto

Roohollah Torabi Kachoosangi

M Pandurangappa

An electrode for use in a electrochemical sensor comprises carbon modified with a chemically sensitive redox-active compound, excluding an electrode based on carbon having derivatized thereon two redox-active species wherein at least one of said species is selected from anthraquinone, phenanthrenequinone and N,N'-diphenyl-p-phenylenediamine (DPPD). The invention further provides a pH sensor comprising:

Electrochemical sensors

Internally calibrated pH and other analyte sensors based on redox agents provide more accurate results when the redox active reference agent is in a constant chemical environment, yet separated from the solution being analyzed in such a way as to maintain electrical contact with the sample. Room temperature ionic liquids (RTIL) can be used to achieve these results when used as a salt bridge between the reference material and the sample being analyzed. The RTIL provides the constant chemical environment and ionic strength for the redox active material (RAM) and provides an electrolytic layer that limits or eliminates direct chemical interaction with the sample. A broad range of RAMs can be employed in a variety of configurations in such 'Analyte Insensitive Electrode' devices.

Device for providing a means for internal calibration in an electrochemical sensor

Devices for detecting an analyte comprising a redox active analyte sensitive material on a working electrode and computer assisted signal acquisition and processing.

Device for detecting an analyte

An electro-chemical sensor is described having two molecular redox systems sensitive to the same species and having an detector to detect relative shifts in the voltammograms of the two redox systems.

Electro-chemical sensor

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Oxford, United Kingdom

Gregory George Wildgoose