Is sample pretreatment required for purifying RNA on the QIAsymphony SP?
FAQ ID -1938

For purification of RNA on the QIAsymphony SP, tissue samples require mechanical disruption and homogenization in the supplied lysis buffer (Buffer RLT Plus), e.g., by using the TissueLyser or TissueRuptor. Cultured cells should be lysed by vortexing in the lysis buffer contained in the kit.