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:
Jan. 23, 2007
Filed:
Aug. 03, 2005
Xinshen Zhang, Chengdu, CN;
Xiaoping Jiang, Chengdu, CN;
Xinshen Zhang, Chengdu, CN;
Xiaoping Jiang, Chengdu, CN;
Sichuan University, Sichuan, CN;
Abstract
A concentrating column useful for elemental analysis of trace metals consists mainly of column body, filtration membranesfixed at the fluid inlet end and the outlet end of the column body, and column packingpacked inside the column body, wherein column packingis prepared from the swollen and cleaned macroporous adsorbent resin of high, medium or non-polarity treated with a mixture of 3 mol/L NHOH-1 mol/L HAC-3.0˜6.0×10mol/L pyridin-(2-azo-4-)resorcin or a mixture of 0.5 mol/L NaHPO-1.0˜2.0×10mol/L pyridin-(2-azo-4-)resorcin by dynamic on-column treatment or static immersion treatment. Two types of sample processing devices useful for elemental analysis of trace metals are provided with concentrating column employing the above-mentioned column packing. The concentrating column of the present invention simplifies the sample processing flow and the structure of sample processing device, saves chemical reagent, increases sample processing rate, and particularly prevents the toxic methanol from doing harm to the operator's health.