Originally posted by whn732 at 2009-6-24 23:35:
Determination of free amine groups [37]. ¼ì²â°±»ùµÄ
Dried gelatin samples (2¨C4 mg)
were reacted with TNBS (0.01 M) in a sodium hydrogencarbonate solution (pH
8.2, 4 w/v%, 2 ml) for 2 h at 40¡ÀC ...