今天上午使用了含水的冰醋酸做,还是不合格.
同时查阅了USP29<431>METHOXY DETERMINATION,该方法中10%醋酸钾的冰醋酸溶液是BROMINE-ACETIC ACID SOLUTION — Dissolve 100 g of potassium acetate in 1000 mL of a solution consisting of 900 mL of glacial acetic acid and 100 mL of acetic anhydride. On the day of use, to 145 mL of this solution add 5 mL of bromine.
翻译过来是要加醋酸酐的,那么鉴于USP的权威性,我之前的猜测从理论上和时间上都是错误的了.
下午继续,使用USP方法配制10%醋酸钾的冰醋酸溶液!作者: bananapeople 时间: 2011-11-23 15:53