Patent ID: 6824985
Filing Date: 2004-11-30
Classification: G01N,Y10S

Abstract:
In an analysis for an analyte in a urine test sample in which antibodies having a detectable label and which are specific to the analyte are combined with the urine test sample and the concentration of the analyte in the urine test sample is determined by the amount of binding of the antibodies having the detectable label with the analyte by measuring the magnitude of the response from the detectable label and comparing the magnitude of the response from the detectable label with responses obtained from calibrators containing similar amounts of urea, the improvement which comprises determining a threshold of urea concentration in the urine test sample which level is greater than that normally found in urine and at which increases in the urea concentration do not affect the accuracy of the analysis and maintaining the concentration of urea in the urine test sample above the threshold value by adding urea thereto.