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:
Mar. 24, 1987
Filed:
Jul. 15, 1985
Applicant:
Inventors:
Alan M Rothman, Jenkintown, PA (US);
Charles C Crabb, Green Lane, PA (US);
Assignee:
Rohm and Haas Company, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
436 92 ; 436178 ; 436904 ;
Abstract
A quantitative, sensitive method for monitoring low concentrations of isothiazolones in aqueous systems is provided. The method involves the adsorption of the isothiazolones on a suitable adsorbent, the desorption of the adsorbed isothiazolones, the breaking of the isothiazolone ring and the formation of a blue complex by the reaction of the broken isothiazolone ring with ferric chloride and potassium ferricyanide. The concentration of the isothiazolones is then determined by conventional colorimetric techniques.