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, 1990
Filed:
Apr. 12, 1989
Applicant:
Inventors:
Adriano Trisciani, Monza, IT;
Rosolino Carera, Soresina, IT;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; B01D / ;
U.S. Cl.
CPC ...
436161 ; 436178 ; 422 70 ; 422 81 ; 422 82 ; 422103 ; 7361 / ; 7386383 ; 7386386 ; 7386435 ; 7386421 ; 7386483 ;
Abstract
A process and an apparatus for performing analyses in liquid chromatography, by means of a pump capable of drawing a fluid and injecting it at high pressure, through at least a control valve, into a separation column. To obtain maximum precision as required by the analysis, before each analysis or each group of analyses, or with respect to each fluid used, a pump stroke is performed with the pump delivery side shut off in order to record and memorize the characteristics of compressibility of the fluid. These characteristics are kept into consideration in the subsequent operative stages to obtain an exactly constant delivery of the feed pump to the separation column.