Sensor devices and method of using same
First Claim
1. A sensor device for detecting components present in fluid samples and providing an output representative of the content of said component, comprising a detecting means and a membrane barrier between the detecting means and a sample to be analyzed, wherein the membrane barrier is composed of a combination of polymer components comprising a mixture of polyvinyl chloride and a polyaryl sulphone.
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Abstract
Sensor devices for detecting components in fluid samples, especially by electrolytic analytical methods, comprising a detecting means (usually an anode, especially one of platinum) surrounded by a selectively permeable membrane barrier composed of a mixture of polyvinyl chloride and polyaryl sulphone polymers. Preferred proportions of the polymers are 1 to 9 parts of polyaryl sulphone for each part of polyvinyl chloride, and the mixture may be formed into membranes by solution casting. Preferably this barrier is used with an inner membrane, especially of porous polycarbonate. In use, these polymer mixtures are especially useful in their selective permeability to glucose. Also provided are methods for their use in analysis, and the polyvinyl chloride/polyaryl sulphone polymer compositions themselves and membranes made from them.
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Citations
20 Claims
- 1. A sensor device for detecting components present in fluid samples and providing an output representative of the content of said component, comprising a detecting means and a membrane barrier between the detecting means and a sample to be analyzed, wherein the membrane barrier is composed of a combination of polymer components comprising a mixture of polyvinyl chloride and a polyaryl sulphone.
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16. A sensor device comprising a membrane selectively permeable to a sugar by diffusion while excluding interferants present in a sample to be analyzed comprising a mixture of polyvinyl chloride and a polyaryl sulphone.
- 17. A sensor comprising a membrane selectively permeable to a sugar while excluding interferants appropriate for incorporation in sensors for analytical and instrumental purposes comprising a polymer composition which is a mixture of polyvinyl chloride and a polyaryl sulphone.
- 19. In a method of detecting and measuring the presence of an analyte in a fluid sample by a membrane enclosed sensor system, the improvement which comprises a permeable membrane comprising a polymer matrix of a mixture of polyvinyl chloride and a polyaryl sulphone wherein the membrane is selectively permeable to the analyte which diffuses through the polymer matrix while excluding interferants present in the fluid sample.
Specification