Quantitative colorimetric assay. This kit is for the detection of Human HP / Haptoglobin. No significant cross-reactivity or interference between HP / Haptoglobin and analogs was observed. This claim is limited by existing techniques therefore cross-reactivity may exist with untested analogs. Sample types: plasma, serum. Range: 0.5 - 10 ng/ml. Precision: Intra-Assay: CV%<9% Inter-Assay: CV%<10%. Time: 1.5 hours