Vitamin B9 (VB9) BioAssay™ ELISA Kit is a competitive inhibition enzyme immunoassay technique for the in vitro quantitative measurement of VB9 in serum, plasma, tissue homogenates, cell culture supernates and other biological fluids.||Detection Range:|246.9-20,000pg/ml||Sensitivity:|83.5pg/ml||Storage and Stability:|Desiccation recommended. The Standard, Detection Reagent A, Detection Reagent B and the 96-well strip plate should be stored at -20°C upon receipt. Store all other reagents at 4°C. Stable for 6 months after receipt of order.