目前我国仍有超过80%以上的生化试剂品种依靠进口。国际上已通行用HPLC纯度、亲和色谱等方法作为最终纯化剂的手段,但我国很少用色谱作最终纯化。用生物工程技术生产生化试剂在国外已很普遍,往往是国外收购我们的药品作原料,纯化后 At present, China still has more than 80% of biochemical reagents imported. Internationally, HPLC purity, affinity chromatography and other methods have been used as the final purifiers, but in China, chromatograms are rarely used for final purification. The use of bioengineering technology to generate reagents has become commonplace in foreign countries. It is often the foreign purchase of our drugs as raw materials, after purification.