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. 14, 1996
Filed:
Jun. 07, 1995
Applicant:
Inventors:
Ushio Hase, Tokyo, JP;
Kazuhisa Yoshimura, Fukuoka, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436164 ; 436166 ; 436178 ; 436100 ; 436174 ; 422 8205 ;
Abstract
In an analytical method for trace amounts of silicic acid in pure water of the present invention, swollen gel which has been swollen with pure water sufficiently is used as granular solid which adsorbs colored silicic acid species. A small amount of swollen gel is aliquotted volumetrically, and then the gel is added to a sample solution. Colored silicic acid species is adsorbed and concentrated on a small amount of the granular solid. Therefore, trace amounts of silicic acid can be determined with high sensitivity.