I notice that the ultracentrifuge step using CsCl gradient for bacteriophage purification takes usually at least 24 hours or more. I am wondering if it actually takes that long for the CsCl gradient to reach its density equilibrium.
J. Colin Murrell, Andrew S. Whiteley 2010. Stable Isotope Probing and Related Technologies. American Society for Microbiology Press,364Pp. ISBN1555815375, 9781555815370
VENNISON, S. JOHN 2009. Laboratory Manual For Genetic Engineering. PHI ,140Pp.Learning Pvt. Ltd., ISBN8120338146, 9788120338142