For quantitative determination of citrate or citric acid and evaluation of drug effects on citrate metabolism. Key Features: Fast and sensitive. Linear detection range: 4 to 400 µ M citrate for colorimetric assays and 0.5 to 40 µ M for fluorimetric assays. Convenient and high-throughput. Homogeneous "mix-incubate-measure" type assay. Can be readily automated on HTS liquid handling systems for processing thousands of samples per day. Method: OD570nm, or FL530/585nm. Samples: Serum, plasma, agriculture etc. Species: All. Procedure: Assay takes 20 min. Kit size: 100 tests. Detection limit: OD, FL: 4, 0.5 µ M.