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:
Dec. 25, 2018
Filed:
Feb. 02, 2015
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Kei Shinada, Uji, JP;
Shigeyoshi Horiike, Uji, JP;
SHIMADZU CORPORATION, Kyoto-shi, JP;
Abstract
To widen the dynamic range of a dielectric barrier ionization detector (BID), an insertion length of a sample injection tubeinto a second gas passageis set so that a sample-gas ejection portis located on the downstream side of a dilution gas from the upper edge of a collector electrodeat which a DC electric field concentrates. By this setting, although the detection sensitivity is lower than in the case where the sample-gas ejection portis placed to maximize the detection sensitivity, the decrease in the detection sensitivity to high-concentration samples is reduced since absorption of light by the sample gas is alleviated. Consequently, the sample-concentration range with a linearly-changing sensitivity becomes wider than that of conventional BIDs. Although the detection sensitivity becomes lower than that of conventional BIDs, a detection sensitivity adequately higher than that of FIDs can be ensured.