离子交换与吸附

本文研究了用大网格吸附剂提取头孢氨苄的方法，包括吸附剂和解吸剂的筛选，吸附条件和解吸条件的考察。确定了用H—103型树脂在pH5、流速1／10（V／V／min）条件下吸附；用50％丙酮在pH1．5、流速1／30（V／V／min）条件下解吸。吸附容量可达75mg／ml，是国内报道过的CAD—40的3倍，是国外报道过的DiaionHP－20的3．8倍，解吸率可达92％以上。

Recovery of cephalexin by macroreticular adsorbent was investigated. Various macroreticular adsorbents were tested. The influence of different adsorption conditions, eluents and desorption conditions was studied. The macroreticular adsorbent H －103 was chosen as the best adsorbent. Results show that the best condition for adsorption is PH3 with flow rate 1/10 (v/v/min), and that for desorption is pH1. 5 with flow rate 1/30(v/ v/ min). The adsorption capacity of macroreticular adsorbent H － 103 is up to 75mg/ml on laboratory － scale which are 3 times as much as that of macroporous resin CAD － 40 reported in China and 3. 8 times as much as that of macroreticular adsorbent Diaion HP － 20 reported abroad.