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中国药典自1990年版起，即采用薄层色谱．分光光度法测定利福平（以下简称．）及其制剂的含量，较好地克服了1985年版中国药典[2]：中直接分光光度法无法准确测得利福平真实含量的弊病。我们在应用该法测定Ⅰ制剂时，常因制剂辅料悬浮溶液中，造成微量进样器针管阻塞而影响实验
Chinese Pharmacopoeia since 1990 edition, the use of thin-layer chromatography. Spectrophotometric determination of rifampicin (hereinafter referred to as) and its preparation content, better overcome the 1985 edition of the Chinese Pharmacopoeia [2]: direct spectrophotometry can not accurately measure the real content of riprap ills. We use this method for the determination of Ⅰ preparation, often due to suspension of the preparation of adjuvant solution, resulting in micro-injector needle obstruction and affect the experiment