Karen Ann Synowiec

US Patent:

20140011285, Jan 9, 2014

Filed:

Jul 3, 2013

Appl. No.:

13/934347

Inventors:

Fabien J. Josse - Brookfield WI, US
Florian Bender - Milwaukee WI, US
Antonio J. Ricco - Los Gatos CA, US
Rachel Mohler - Emeryville CA, US
Urmas Kelmser - San Ramon CA, US
Karen Synowiec - Martinez CA, US
Robert Michael Lorenz - Walnut Creek CA, US

Assignee:

CHEVRON U.S.A. INC. - San Ramon CA

International Classification:

G01N 33/18

US Classification:

436139, 422 69

Abstract:

A process for a pre-concentration unit including: a sorbent material coated passage-way having an entrance for receiving a hydrocarbon-containing groundwater sample and for pre-concentrating the hydrocarbons in a hydrocarbon-containing groundwater sample by successive sorption/desorption cycles, and having an exit for discharging the pre-concentrated hydrocarbons; a heating unit for heating the sorbent material coated passage-way; and; an array of shear horizontal-surface acoustic wave sensors with coatings adapted for detecting and quantifying the pre-concentrated hydrocarbons, disposed at the exit of the sorbent material coated passage-way; and a housing for enclosing the pre-concentration unit and the array of shear horizontal-surface acoustic wave sensors, adapted for continuous use at a body of hydrocarbon-containing groundwater, and coupled to mathematical methods for generating concentrations of specific analytes from both transient and steady-state signals.

US Patent:

20140274804, Sep 18, 2014

Filed:

Mar 13, 2014

Appl. No.:

14/209573

Inventors:

David Glynn Thomas - Wembley Downs, AU
Rachel Ellen Mohler - Emeryville CA, US
Karen Ann Synowiec - Martinez CA, US
Elaine Mae Bild - Berkeley CA, US

Assignee:

CHEVRON U.S.A. INC. - San Ramon CA

International Classification:

G01N 33/18
G01N 33/00

US Classification:

506 15, 422 8201, 422 98

Abstract:

A sensor assembly is disclosed for detecting, speciating, and measuring a concentration of organic analytes in a fluid stream. The assembly includes a housing for containing elements of the sensor assembly; a sensor array configured to detect and measure the concentration of the organic analytes in the fluid sample and produce an electrical output signal indicative of a type and concentration of the organic analytes detected; an inlet channel through which a sample is drawn into the housing and into contact with the sensor array; an outlet channel through which the sample is expelled from the housing; and a sampler located within the housing for drawing the fluid sample into the housing via the inlet channel and expelling the sample via the outlet channel.