SEC/Size-exclusion chromatography is surely an important method in Biochemistry.
Every separation gel has some hydrophobicity, and some hydrophobic proteins are absorbed to the separation gels. Therefore, high-recovery analysis in chromatography is essential issue (please see file; HPLC-SEC BIN NP-40).
Then, the addition of non-ionic detergent (Polyethylene-glycol 1000 monocetyl ether/PGC/Brij 58) is inexpensable in SEC separation (please see files; SEC column 300A silica and JCB Fucoidan transport).
Since the addition of 1% (v/v) Polyethylene-glycol 1000 monocetyl ether/PGC/Brij 58 in the eluent increases extremely the column-inlet pressure, ordinary or classical soft-type SEC gels can not endure this pressure.
Therefore, the quantitative SEC analysis is only achievable by HPLC-SEC (silica gel) method.