For quantitative determination of creatine and evaluation of drug effects on creatine metabolism. Key Features: High sensitivity and wide linear range. Use 10 µ L sample. Linear detection range 4 to 1000 µ M (colorimetric) or 0.5 to 50 µ M (fluorimetric) . Homogeneous and simple procedure. Simple "mix-and-measure" procedure allows reliable quantitation of creatine within 30 minutes. Method: OD570nm, or FL530/590nm. Samples: Serum, plasma, urine, saliva etc. Species: All. Procedure: Assay takes 30 min. Kit size: 100 tests. Detection limit: 4 µ M.