TEST DEVICE FOR DETECTING AN ANALYTE IN A LIQUID SAMPLE
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Abstract
The present invention relates to test devices, and in particular devices capable of detecting the presence or absence of an analyte in a sample, such as a liquid sample. Also provided are methods of using such devices for quantitative or qualitative measurement of one or more analytes in a liquid sample.
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Citations
44 Claims
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1-34. -34. (canceled)
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35. A device for determining the presence of an analyte in a liquid sample, the device comprising:
a test strip defining a flow path, comprising; a second reagent zone positioned along the flow path, the second reagent zone comprising a first binding agent, the first binding agent being mobilizable by the liquid sample, the first binding agent being capable of binding the analyte to form a first complex; a first reagent zone located downstream of the second reagent zone along the flow path, the first reagent zone comprising a second binding agent, the second binding agent being mobilizable by the liquid sample, the second binding agent being capable of binding the first complex to form a second complex, the second binding agent comprising a detectable label; and a test zone located downstream of the first reagent zone along the flow path, the test zone comprising a third binding agent, the third binding agent being immobilized in the test zone, the third binding agent being capable of binding the second complex. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
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43. A device for determining the presence of an analyte in a liquid sample, the device comprising:
a test strip defining a flow path, comprising; a second reagent zone positioned along the flow path, the second reagent zone comprising a first binding agent, the first binding agent being mobilizable by the liquid sample, the first binding agent being capable of binding the analyte to form an analyte complex if analyte is present in the liquid sample; a first reagent zone located downstream of the second reagent zone along the flow path, the first reagent zone comprising a second binding agent, the second binding agent being mobilizable by the liquid sample, the second binding agent being capable of binding the first binding agent to form a second complex if analyte is not present in the sample, the second binding agent comprising a detectable label; and a test zone located downstream of the first reagent zone along the flow path, the test zone comprising a third binding agent, the third binding agent being immobilized in the test zone, the third binding agent being capable of binding the first binding agent.
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44. A device for determining the presence of an analyte in a liquid sample, the device comprising:
a test strip defining a flow path, comprising; a second reagent zone positioned along the flow path, the second reagent zone comprising a first binding agent, at least a portion of the first binding agent being immobilized in the second reagent zone, and at least a portion of the first binding agent being mobilizable by the liquid sample, the first binding agent being capable of binding the analyte to form a first complex; a first reagent zone located downstream of the second reagent zone along the flow path, the first reagent zone comprising a second binding agent, the second binding agent being mobilizable by the liquid sample, the second binding agent being capable of binding the first complex to form a second complex, the second binding agent comprising a detectable label; and a test zone located downstream of the first reagent zone along the flow path, the test zone comprising a third binding agent, the third binding agent being immobilized in the test zone, the third binding agent being capable of binding the second complex.
Specification