The Quant-iT PicoGreen dsDNA Assay Kit is recommended for quantifying PCR products that have been cleaned with ExoSAP-IT reagent. ExoSAP-IT PCR cleanup results in 100% recovery regardless of amplicon length, and if the PCR product was quantified prior to ExoSAP-IT cleanup, additional quantification is not necessary. We do not recommend using a spectrophotometer as degraded products will be included in the quantification.