High carrying capacity metal chelating affinity chromatography medium
A chromatographic medium and metal chelation technology, applied in chemical instruments and methods, peptide preparation methods, solid adsorbent liquid separation, etc., can solve problems such as single structure, low protein loading, and low separation and purification efficiency, and achieve The improvement method is simple, the protein loading capacity is increased, and the effect of immobilization capacity is improved
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Embodiment 1
[0016] The preparation process is as follows:
[0017] 1) Soak 20g of silica gel microspheres with a particle size of 30-100μm in 0.5mol / L sodium hydroxide solution, stir at 50-55°C for 1-1.5 hours to activate the silica gel microspheres, and vacuum-dry the silica gel microspheres 12 hours; after taking out the silica gel microspheres from the vacuum drying oven, quickly place them in an anhydrous ethanol solution containing 500g / L carboxymethyl chitooligosaccharide molecules and 3mol / L sodium hydroxide, and stir and react at 35-40°C for 4 ~5 hours, after drying, the inner core of silica gel microspheres with carboxymethyl chitosan molecules attached;
[0018] 2) Rinse the inner core of the silica gel microspheres obtained in step 1) with deionized water, add 23g (about 0.2mol) allyl glycidyl ether, 5g sodium sulfate, 5g sodium hydroxide, and 100ml deionized water in sequence, Stir at 50°C for 18 hours, wash with deionized water, and dry to obtain the activated core of silica...
Embodiment 2
[0023] In the step 2) in the embodiment 1, 2mol / L nickel acetate is replaced with the iron acetate of the same amount, all the other preparation processes are consistent with embodiment 1, obtain the bimetallic layer chelation affinity chromatography medium of different metals.
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