Methods and apparatus for determination of halohydrocarbons

US10018567B2 · kind B2 · utility

Assignee

• AMS Trace Metals, Inc. · US

Inventors

• Harmesh K. Saini · Santa Clara, US
• Michael J. West · San Jose, US
• Qin Wang · Beijing, CN
• James Garvey · San Jose, US
• Paul Rand · San Jose, US
• Mark Angelo · San Jose, US
• David Johnston · Portola Valley, US
• Robert Ormond · San Jose, US
• Ye Han · San Jose, US

Key dates

• Filing date: Aug 6, 2015
• Grant date: Jul 10, 2018
• Expiry date: Aug 11, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/193333
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A real-time, on-line method and analytical system for determining halohydrocarbons in water which operate by (1) extracting on-line samples; (2) purging volatile halohydrocarbons from the water (e.g., with air or nitrogen); (3) carrying the purge gas containing the analytes of interest over a porous surface where the analytes are adsorbed; (4) recovering the analytes from the porous surface with heat (thermal desorption) or solvent (solvent elution) to drive the analytes into an organic chemical mixture; (5) generating an optical change (e.g., color change) in dependence upon a reaction involving the analytes and a pyridine derivative; and (6) measuring optical characteristics associated with the reaction to quantify the volatile halogenated hydrocarbon concentration.