USP34中关于胰岛素的锌含量测定原文：Zinc content 591 — Determine the zinc content of about 10 mg of it, accurately weighed: not more than 1.0% is found, calculated on the dried basis. 大概意思是：精密称取10mg样品，按干燥品计算其含量不超过1.0%。而在591中，原文“591 ZINC DETERMINATION The need for a quantitative determination of zinc in the Pharmacopeial insulin preparations reflects the fact that the element is an essential component of zinc-insulin crystals. In common with lead, zinc may be determined either by the dithizone method or by atomic absorption. ” 红色字体，大概意思是“通常铅，锌的含量的测定，可以用双硫腙法或原子吸收法测定。
迎国庆送壕礼！十月发帖抢大疆云台
【官方邀请】高效液相色谱使用情况有奖调研
喜迎国庆！第十七届原创大赛超级原创日参赛奖励翻倍
丹纳赫四十周年寄语征集领大礼包
