Microplate measurement of urinary albumin and creatinine |
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Authors: | R A Magnotti G W Stephens R K Rogers A J Pesce |
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Institution: | Department of Internal Medicine, University of Cincinnati, OH 45267-0585. |
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Abstract: | We describe microplate methods for measurement of human urinary albumin (HUA) by competitive enzyme-linked immunosorbant assay (ELISA) and creatinine with a modified commercial enzymatic kit. Incorporation of substrate mixing into the competitive ELISA changes the dynamic absorbance-concentration response, greatly simplifying calculations and improving sensitivity and accuracy. Measurement of creatinine in urine and plasma samples with a commercially available enzymatic kit modified for analysis by use of an inexpensive microplate reader produced values comparable in precision and accuracy to those obtained by an automated kinetic Jaffé method. |
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