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利凡诺含量测定方法较多(如1963年《卫生部药品标准》规定的重量法等)。本文采用亚硝酸钠法并以永停法确定终点来测定利凡诺含量。此法具有用量少、简便、快速等优点,并适用于利凡诺针剂含量的测定。一、操作方法与结果取利凡诺约0.1g,精密称定,置烧杯中,加水30ml,置电磁搅拌器上,搅拌使溶解,再加盐酸(1→2)3ml 搅拌,插入铂-铂电极后,将滴定管的尖端插入液面下约2/3处,用0.1M 亚硝酸钠溶液滴定,随滴随搅拌,至近终点时,将滴定管的尖端提出液面,用少量水淋洗尖端,洗液并入溶液中,继续缓缓滴定,用永停法指示终点,至电流计指针持续1分钟不回复,
Rivanol content determination methods (such as the 1963 “Ministry of Health Drug Standards” under the weight method, etc.). In this paper, sodium nitrite method and to determine the end of the permanent stop method to determine rivanol content. This method has the advantages of less dosage, simpleness and quickness, and is suitable for the determination of rivanol injection. First, the operation method and results take advantage of Connaught about 0.1g, accurately weighed, set the beaker, add water 30ml, set the electromagnetic stirrer, stirring to dissolve, add hydrochloric acid (1 → 2) After the electrode, the tip of the burette into the liquid level about 2/3 Department, titration with 0.1M sodium nitrite solution, with the drop with stirring, to near the end of the buret tip presented liquid level, rinse the tip with a small amount of water, Lotion into the solution, continue to titrate, with the stop method to indicate the end, until the current meter pointer for 1 minute does not reply,