A simplest, direct "Add-and-Measure" assay for phytase enzyme activity in agricultural and biological samples. Key Features: Simple and convenient: No complex detection reagents to mix. High sensitivity and wide detection range: Detection range of 0.01 to 20 U/L phytase in a 96-well plate assay. Fast and high-throughput: Homogeneous "mix-and-measure" assay allows for quantification of phytase activity within 60 minutes. Method: OD620nm. Samples: Enzyme extracts, agriculture and biological samples. Species: All (e.g. Wheat, Barley) . Procedure: Assay takes 60 min. Kit size: 100 tests. Detection limit: 0.01 U/L.