Easy! It's like AGPC method.
Plasmid DNA was prepared by the alkali prep
add DW, not use buffered water.
add 1/10 vol. of 2M Sodium Acetate pH. 4.0
add equal vol. of water-saturated phenol
centrifuge
collect sup.
add equal vol. of water saturated phenol
centrifuge
collect sup.
EtOH precipitation