影子
第1楼2010/10/16
这个方法I是增加的部分:
Use Method I unless otherwise directed.除另有规定外,采用方法一测定?方法一可是用的铂坩埚啊,如果批量多这得要多少铂坩埚??
Method I
(No Ph. Eur. method)
Heat a platinum dish to redness for 10 minutes, allow to cool in a desiccator and weigh. Unless otherwise specified in the
monograph, place 1 g of the substance being examined in the dish, moisten with sulphuric acid, ignite gently, again moisten with
sulphuric acid and ignite at about 800°. Cool, weigh again, ignit e for 15 minutes and repeat this procedure until two successive
weighings do not differ by more than 0.5 mg.
方法二倒是没什么改变