For quantitative enzymatic determination of urea. Key Features: Fast and sensitive. Linear detection range (20 µ L sample) : 1 mg/mL (0.17 mM) to 100 mg/mL (17 mM) urea in 96-well plate assay. Convenient. The procedure involves adding a single working reagent, and reading the absorbance after 5 minutes. Room temperature assay. No 37° C heater is needed. High-throughput. Homogeneous "mix-incubate-measure" type assay.Can be readily automated as a high-throughput 96-well plate assay for thousands of samples per day. Method: OD557nm. Samples: Urea in biological samples (e.g. plasma, serum, urine) and food/beverage samples (e.g. milk) . Species: All. Procedure: Assay takes 5 min. Kit size: 100 tests. Detection limit: 1 mg/mL (0.17 mM) .