Human Vasopressin-neurophysin 2-copeptin ELISA kit is a single-wash 90-min Simplestep used to quantify Human Vasopressin-neurophysin 2-copeptin with a sensitivity of 12.034 pg/ml. The assay uses a simple mix-wash-read protocol with just one incubation and one wash step. Colorimetric Sandwich ELISA - 450 nm readout: works on any standard plate reader.