Patent ID: 6506575
Filing Date: 2003-01-14
Classification: G01N

Abstract:
Analytical element for determining the amount of an analyte in a liquid, the element comprising a sample application zone and a detection zone which are in liquid-transferring contact, the detection zone containing at least one enzyme and an indicator substance, the enzyme catalysing a reaction in which the analyte or a substance derived from the analyte participates and the indicator substance forming a signal when the analyte is present which signal correlates with the amount of analyte, and a liquid-permeable interference-reducing layer in direct contact with the detection zone arranged such that liquid does not reach the detection zone until the liquid has passed through the interference-reducing layer, the interference-reducing layer containing at least one enzyme which participates in a reaction of the analyte to be determined or of a substance derived from the analyte, wherein the analyte or the substance derived from the analyte is converted enzymatically in the interference-reducing layer into end products which cannot contribute to the signal formation by the indicator substance.