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:
Jun. 23, 1992
Filed:
Aug. 01, 1991
Robert A Bredeweg, Midland, MI (US);
Richard G Melcher, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A three step flow injection analysis method for determining the degree of neutralization of phenol in solution. The first step is to flow a stream of a carrier liquid, such as water, along one side of a two sided semipermeable membrane, such as a silicone rubber membrane. The second step is to flow a stream of water along the other side of the membrane to a detector, such as a flow through ultraviolet spectrometer, the detector being responsive to the concentration of the phenol in the flowing stream of water. The third step is to add a volume of the solution to the flowing stream of carrier liquid so that the solution is carried to the first side of the membrane where a portion of the phenol permeates across the membrane into the flowing stream of water to be detected by the detector, the degree of neutralization of the phenol in the solution being a function of the response of the detector. The results of the method are substantially unaffected by variations in the concentration of the phenol.