RNA purification method mRNA threshold miRNA threshold QIA1 6 3 QIA4 5 3 NOR0.25 13.01 3 NOR5 5.96 3 MAX0.1 10.78 5 MAX0.5 7 3 MIR0.2 6 3 MIRA0.2 9 3 MIRA0.6 6.73 2 MIRV0.1 14.01 6 MIRV0.625 9.01 4 MIRVE0.1 NA 15.36 MIRVE0.625 NA 7 NUC0.3 10.01 3 NUC0.9 7.62 3