You can clean your RNA by a column base kit.
Like this one which is very cheap and as good as RNeasy Plus Mini kit of Qiagen. That is it has two column. One for removing DNA and particles, and the second column which is for RNA binding.
Blood/Cultured Cell Total RNA Mini Kit (300prep) $363.00 CDN from Favorgen Biotech Corporation
Copare the price:
Qiagen RNeasy Plus Mini Kit (250 prep) $1,628.00
Favorgen Blood/Cultured Cell Total RNA Mini Kit (300 prep) $363.00
and a tips and triks for using all column base purification kits:
use 14000 RPM (20800 rcf) for all steps for anything from purification of DNA, RNA and etc..
Edited by memari, 19 December 2013 - 12:33 PM.