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:
May. 22, 2012
Filed:
Nov. 18, 2008
Eric Crosson, Mountain View, CA (US);
Bruce A. Richman, Sunnyvale, CA (US);
Bruce H. Vaughn, Boulder, CO (US);
James W. C. White, Boulder, CO (US);
Eric Crosson, Mountain View, CA (US);
Bruce A. Richman, Sunnyvale, CA (US);
Bruce H. Vaughn, Boulder, CO (US);
James W. C. White, Boulder, CO (US);
Picarro, Inc., Santa Clara, CA (US);
The Regents of the University of Colorado, Denver, CO (US);
Abstract
Preparation methods for introducing liquid samples to gas analysis instruments include 1) complete evaporation of a liquid sample in a sample chamber, and 2) allowing the sample vapor in the sample chamber to equilibrate for a predetermined time. An inert carrier gas (e.g., dry nitrogen or zero air) is also admitted to the sample chamber. After equilibration, the sample vapor is admitted as a conditioned sample to an analysis instrument. Preferably, the predetermined equilibration time is sufficiently long that the sample vapor in the sample chamber becomes substantially homogeneous with respect to both concentration and isotopic ratio. Vapor derived from a liquid calibration standard in this manner can be employed as an accurate gas-phase calibration reference.