Rat Neutrophil Elastase ELISA Kit is a sandwich ELISA kit for use with Serum, plasma and other biological fluids. This assay has high sensitivity and excellent specificity for detection of Neutrophil Elastase. No significant cross-reactivity or interference between Neutrophil Elastase and analogues was observed. Please note that this kit is also available as a CLIA Kit. Quantitative Colorimetric Sandwich ELISA. Sample Types: serum, plasma and other biological fluids. Range: 1.56 ng/ml - 100 ng/ml. Sensitivity: < 0.64 ng/ml