Steven R West

6350367, Feb 26, 2002

Oct 23, 1998

09/178011

Steven J. West - Hull MA

Orion Research, Inc. - Beverly MA

G01N 2726

205775, 204400, 204416, 436 8

The present invention is directed to a stable, non-hazardous solution for calibrating oxidation-reduction potential (ORP) measurement cells. The redox standard calibration solution of the present invention consists essentially of an aqueous solution containing the triiodide/iodide redox couple. In a preferred embodiment, the solution of the present invention consists essentially of an aqueous solution containing up to about 0. 01 moles per liter of iodine (I ) and at least about 1 mole per liter of potassium iodide. In a most preferred embodiment, the solution of the present invention consists of an aqueous solution of 4 molar potassium iodide (KI) and 0. 0067 molar iodine (I ).

6793787, Sep 21, 2004

Mar 15, 2002

10/098687

Moshe Hirshberg - Brookline MA
Steven J. West - Hull MA
James Barbookles - Ipswich MA

Orion Research, Inc. - Beverly MA

G01N 27333

204416, 204420

An improved ion-selective electrode with enhanced sensitivity and reliability. The electrode is readily formed from an electrode assembly sealingly joined to the upper end of an electrode chamber whose lower end opens into in a tube bore of substantial path length that provides a conductive path between the electrode assembly and a sensing tip of the electrode. The electrode assembly itself takes the form of a generally helical coil formed on a post extending from the upper end of the assembly and positioning a substantial length of conductive lead remote from the sensing tip of the electrode. The electrode chamber is thermally insulated from the main body of the electrode, and adverse temperature effects are thus greatly minimized. A self-cleaning junction has also been developed. Increased reliability for a given sensitivity have been found to result from the construction.

7276142, Oct 2, 2007

Feb 12, 2002

10/074219

Steven J. West - Hull MA, US
Moshe Hirshberg - Brookline MA, US

Thermo Orion Inc. - Beverly MA

G01N 27/36
G01N 27/403

204433, 204435

Disclosed are combination glass pH electrodes, the standard potential of which is stabilized by means one or more of the following structural modifications:.

7323091, Jan 29, 2008

Sep 24, 2003

10/669454

Timothy C. Gillette - Brookline MA, US
Steven J. West - Hull MA, US

Orion Research, Inc. - Beverly MA

G01N 27/414

204416, 204412, 257253

A multimode electrochemical sensing array formed on an integrated circuit chip is structured to provide electrochemical determination of acidity or alkalinity, as well as electrochemical and potentiometric measurement of oxidation/reduction potentials, conductivity measurements, electrostatic discharge protection, and ground provisioning.

8021529, Sep 20, 2011

Jul 20, 2005

11/185545

Steven J. West - Hull MA, US
Armin Kusig - Wayland MA, US
Stephen Olsted - Rowley MA, US
Jonathan Lowe - Scotland, GB
Xiaowen Wen - Lexington MA, US

Thermo Orion, Inc. - Beverly MA

G01N 27/27

204409, 204400, 204407, 324438, 324450

A measurement/calibration cell for potentiometrically measuring ion concentration in a fluid interposes a barrier between measuring and reference electrodes and positions the measuring electrode at a sufficiently higher gravimetric potential above the reference electrode that seepage of electrolyte from the latter to the former is effectively precluded. A controller associated with the cell displays instructions and other desired information on a scrolling display such that a substantial amount of information can be presented in a relatively small display window.

8603307, Dec 10, 2013

May 27, 2008

12/127534

Steven J. West - Hull MA, US
Timothy C. Gillette - Brookline MA, US

Thermo Fisher Scientific, Inc. - Beverly MA

G01N 27/333
G01N 27/36

204401, 204406, 204416

A system for monitoring the viability of an electrochemical cell measures the impedance of the cell over a wide range of impedances and with diminished phase shift over prior methods so that a more nearly accurate assessment of the impedance can be made. The system is particularly useful for four electrode systems, but is not so limited. It may advantageously be incorporated in the cell itself to further minimize cabling artifacts.

20030024812, Feb 6, 2003

Feb 28, 2001

09/796103

Steven West - Hull MA, US

G01N027/414

204/416000, 204/435000

Disclosed is an electrochemical cell containing two or more electrodes wherein the half-cell potential of at least one electrode is determined by the concentration of a specific ion anticipated to be present in all test solutions, said ion concentration being measured in the cell by a first electroanalytical technique that does not depend on a known reference electrode potential, such that said electrode, its half-cell potential being calculable from the measured ion concentration, can then serve as a reference electrode in one or more subsequent electroanalytical techniques that do depend on a known reference electrode potential, said subsequent technique or techniques being carried out in the same cell.

20070199816, Aug 30, 2007

Feb 24, 2006

11/361124

Zhisheng Sun - Hopkinton MA, US
Steven West - Hull MA, US
Xiaowen Wen - Lexington MA, US
June d'Heilly - Boston MA, US

C25B 11/04

204291000

A fluoride monitoring electrode comprises a single crystal of a lanthanum series fluoride doped with alkaline earth ions. The sample pre-treatment solution used in conjunction with the electrode includes a buffer that maintains a pH of 5 to 8 and a complexing agent that complexes iron and aluminum.