Biosensors and porous particle reagent compositions
First Claim
1. A test sensor to assist in determining information of an analyte in a fluid sample, the test sensor comprising:
- a base including a reagent composition, the reagent composition including porous particles with a plurality of pores, the porous particles having an average diameter from 0.05 to 10 micrometers (μ
m) and a void volume of at least 20% (v/v), an electron transfer mediator, a polymeric material, and an enzyme; and
a second layer, the second layer and the base assisting in forming an opening for receiving the fluid sample.
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Abstract
A reagent composition for a biosensor sensor strip is disclosed that provides for rapid rehydration after drying. The composition includes porous particles and is preferably formed as a colloidal suspension. The dried reagent composition including porous particles may provide analytically useful output from the sensor strip in a shorter time period than observed from dried reagent compositions using solid particles. The output signal from the porous particle compositions may be correlated to the analyte concentration of a sample within about two seconds. In this manner, an accurate concentration determination of an analyte concentration in a sample may be obtained in less time than from sensor strips including conventional compositions. The reagent composition including the porous particles also may allow for the redox reaction between the reagents and the analyte to reach a maximum kinetic performance in a shorter time period than observed from conventional sensor strips.
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Citations
25 Claims
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1. A test sensor to assist in determining information of an analyte in a fluid sample, the test sensor comprising:
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a base including a reagent composition, the reagent composition including porous particles with a plurality of pores, the porous particles having an average diameter from 0.05 to 10 micrometers (μ
m) and a void volume of at least 20% (v/v), an electron transfer mediator, a polymeric material, and an enzyme; anda second layer, the second layer and the base assisting in forming an opening for receiving the fluid sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A test sensor to assist in determining information of an analyte in a fluid sample, the test sensor comprising:
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a base including a reagent composition, the reagent composition including porous particles having a plurality of pores, the porous particles having an average diameter from 0.05 to 5 micrometers (μ
m) and a void volume of at least 20% (v/v), from about 0.5 to about 10% (w/w) of an electron transfer mediator, from about 0.1 to about 10% (w/w) of a polymeric material, and an enzyme, the enzyme being glucose dehydrogenase or glucose oxidase; anda second layer, the second layer and the base assisting in forming an opening for receiving the fluid sample.
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Specification