Chloride ion selective membrane electrode having improved stability and selectivity
First Claim
Patent Images
1. An ion-selective-electrode sensor membrane for determining the presence of chloride in fluids, the membrane comprising:
- a first polymeric layer having a polymeric bonding material consisting of mixtures of methyl methacrylate and choloro-methyl styrene copolymer that have been reacted with tertiary amines and at least 8 mole-percent of quaternary ammonium groups covalently bound to said polymeric bonding material; and
,a second polymeric layer comprising a chloride ionophore,wherein the first polymeric layer is positioned between the second polymeric layer and the fluids, thereby increasing the uselife of the selectivity and sensitivity of the membrane in the presence of interfering anions within the fluids.
16 Assignments
0 Petitions
Accused Products
Abstract
A method for extending the uselife of a chloride ion selective membrane of an ISE sensor by providing a two-layer sensor structure wherein an quaternized ion-selective polymeric layer is positioned between a sample to be analyzed and a conventional polymeric ISE membrane containing an ion-exchange agent. Also provided are polymer compositions comprised methyl methacrylate/choloromethyl styrene copolymer and mixtures thereof that have been reacted with tertiary amines.
-
Citations
7 Claims
-
1. An ion-selective-electrode sensor membrane for determining the presence of chloride in fluids, the membrane comprising:
-
a first polymeric layer having a polymeric bonding material consisting of mixtures of methyl methacrylate and choloro-methyl styrene copolymer that have been reacted with tertiary amines and at least 8 mole-percent of quaternary ammonium groups covalently bound to said polymeric bonding material; and
,a second polymeric layer comprising a chloride ionophore, wherein the first polymeric layer is positioned between the second polymeric layer and the fluids, thereby increasing the uselife of the selectivity and sensitivity of the membrane in the presence of interfering anions within the fluids. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification