Bio-Gels:

Bio-Gels are available in eleven types with different swelling characteristics and different fractionation ranges. A various type is characterized through the letter P. There are gels from Bio-Gel P-2 to Bio Gel P-300. The number is intended to denote the exclusion limit.

There are striking similarities in the chromatographic behaviour of Bio-Gel and Sephadex gel. Both the gel categories are microreticular. Their selectivity curves are also quite same. The similarity is also reflected within their mechanical properties. Bio-Gel beads like Sephadex beads with low water regain are brittle although the ones with high water regain are very soft.