CHARLES WALLACE MARTIN, III
Pilots at Panadero Dr, Austin, TX
License number
Texas A5223044
Issued Date
Dec 2014
Expiration Date
Dec 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
8605 Panadero Dr, Austin, TX 78747
Professional information
Large Organic Cation-Selective Electrodes
US Patent:
4399002, Aug 16, 1983
Filed:
Feb 27, 1981
Appl. No.:
6/239081
Inventors:
Henry Freiser - Tucson AZ
Charles R. Martin - Austin TX
Charles R. Martin - Austin TX
Assignee:
University Patents, Inc. - Norwalk CT
International Classification:
G01N 2746
US Classification:
204 1T
Abstract:
Concentrations of large organic cationic species in aqueous solution are measured as a function of potentiometric response, employing a cation-selective electrode having a high degree of selectivity for large organic cationic species with respect to both smaller organic cationic species and inorganic cationic species. The electrode is formed with a cation-selective membrane component composed of a polymeric matrix having dispersed or dissolved therein a cation exchange material whose counter-anion is a high molecular weight alkyl or alkaryl sulfonate or sulphate. By proper choice of the cationic moiety of the cation exchange material, the electrode may be made selective for a variety of large organic cationic species, including a number of such species which are of pharmaceutical or clinical interest, thereby enabling potentiometric assays for such species.