Immobilized enzyme membrane for a semiconductor sensor
First Claim
1. A membrane containing an immobilized enzyme comprising:
- a water soluble photosensitive resin including poly-vinyl pyrrolidone having a high molecular weight crosslinked to 2, 5-bis (4'"'"'-azide2'"'"'-sulfobenzal) cyclopentanone sodium salt; and
an enzyme.
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Accused Products
Abstract
A membrane containing an immobilized enzyme for a semiconductor sensor is prepared containing a water soluble photosensitive resin including a high molecular weight polyvinyl pyrrolidone crosslinked to 2, 5-bis (4'"'"'-azide-2'"'"'-sulfobenzal) cyclopentanone sodium salt, and an enzyme. Glutaraldehyde and bovine serum albumin, polyamino acid or polyamino amino acid copolymer may also be present to provide chemical crosslinking. The enzyme may be glucose oxidase, urease or lipase. The membrane can be directly formed on ion-sensitive protions of a pH-ion sensitive field effect transistor to form a semiconductor sensor by coating an aqueous solution of the resin and enzyme on the ion-sensitive portion, drying and irradiating with light such as ultraviolet light to provide photo crosslinking.
114 Citations
56 Claims
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1. A membrane containing an immobilized enzyme comprising:
a water soluble photosensitive resin including poly-vinyl pyrrolidone having a high molecular weight crosslinked to 2, 5-bis (4'"'"'-azide2'"'"'-sulfobenzal) cyclopentanone sodium salt; and
an enzyme.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for producing a membrane containing an immobilized enzyme comprising the steps of:
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coating on a base an aqueous solution which is composed of a water soluble photosensitive resin including polyvinyl pyrrolidone having a high molecular weight and 2,5-bis(4'"'"'-azide-2'"'"'-sulfobenzal) cyclopentanone sodium salt, and an enzyme; drying the aqueous solution thus coated on said base so as to form a membrane containing an immobilized enzyme; and irradiating said membrane containing an immobilized enzyme with ultraviolet light to provide photo-crosslinking between said polyvinyl pyrrolidone, said cyclopentanone sodium salt, and said enzyme. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A sensor containing an enzyme comprising:
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a first pH-ion sensitive field effect transistor having a membrane containing a first immobilized enzyme, said membrane being composed of a first water soluble photosensitive resin including polyvinyl pyrrolidone having a high molecular weight crosslinked to 2,5-bis(4'"'"'-azide-2'"'"'-sulfobenzal) cyclopentanone sodium salt, and said first enzyme; a second pH-ion sensitive field effect transistor; and a reference electrode. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification