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:
Oct. 06, 1981
Filed:
Oct. 05, 1979
Applicant:
Inventors:
Giorgio Sisti, Melzo, IT;
Bruno Colombo, Cologno Monzese, IT;
Assignee:
Carlo Erba Strumentazione S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ; G01N / ;
U.S. Cl.
CPC ...
2323 / ; 422 78 ; 422 80 ; 422 89 ; 2323 / ;
Abstract
A method and apparatus for the quantitative determination of very small percentages of sulphur in sample analysis is carried out by means of sample combustion in a helium current temporarily enriched with oxygen, subsequent catalytic oxidation and reduction of the combustion gases, gas chromatographic separation and detection in a thermal conductivity detector. At the outlet of this thermal conductivity detector the products are fed to a water trap and to a sulphur selective detector of the flame photometric type to detect sulphur contents below 0.5 .mu.g.