The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Sep. 27, 2006
Dieter Kita, Blackstone, MA (US);
James H. Grassi, Westwood, MA (US);
Jeffrey Socha, Berlin, MA (US);
Bryan A. Marcotte, Blackstone, MA (US);
Dieter Kita, Blackstone, MA (US);
James H. Grassi, Westwood, MA (US);
Jeffrey Socha, Berlin, MA (US);
Bryan A. Marcotte, Blackstone, MA (US);
Thermo Electron, Inc., Waltham, MA (US);
Abstract
A calibration assembly generates elemental mercury and oxidized mercury for calibrating components of a mercury monitoring system, including making necessary adjustments to efficiencies of a mercury compound converter and an elemental mercury detector. The calibrator generates an elemental mercury sample having a known elemental mercury concentration, [Hg]and combines an oxidizing component with the elemental mercury sample, thereby producing a reduced concentration of elemental mercury [Hg]within the sample. The calibrator measures the concentration of elemental mercury [Hg]within the sample and calculates a difference between the known elemental mercury concentration, [Hg]and the reduced concentration [Hg]. The difference between [Hg]and [Hg]is substantially equal to the concentration of oxidized mercury produced by the calibrator. The concentration of oxidized mercury can also be calculated as the difference between elemental mercury detected after passing a sample stream containing oxidized mercury through a channel which includes the converter and the reduced concentration [Hg]detected after passing the sample stream through a channel which bypasses the converter. By providing oxidized mercury at calculated concentrations, the calibrator allows a user to calibrate continuous emission monitoring systems for accurate response to both elemental mercury and oxidized mercury.