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. 05, 2002
Filed:
Sep. 02, 1998
Frank H. Schaedlich, Toronto, CA;
Daniel R. Schneeberger, Toronto, CA;
Tekran Inc., Toronto, CA;
Abstract
A method and apparatus are provided for collecting a sample gaseous mercury, to differentiate between different gaseous mercury components. A quartz denuder module is provided having a coated extended surface for adsorbing reactive gaseous mercury. After collection of a sample, the coating it is heated to desorb the mercury as elemental gaseous mercury, which can then be detected and measured in conventional analyzer. During the sampling phase, as reactive gaseous mercury is removed from the sample flow in the denuder, the sample can then be passed to the analyzer for detection of elemental gaseous mercury. Where particulate mercury may be present, a filter trap can be provided downstream from the denuder. Separate steps can be provided for heating and pyrolysis of particulate mercury, for separate measurement in the analyzer. The pump module can be configured to a past the gas sample through scrubbers, to generate zero air as a flushing gas. The denuder can be mounted in separated module, so that it can be mounted in desired external location, remote from other instrumentation.