“0.50 mg per g” make sense
= = = = = =
Correction
“0.50 mg per g” makes sense
hyheying 发表:今天发现不同药典中恒重的定义是有区别的，而且平时并没有完全按药典来做，特贴出来供大家参考比较：
中国药典：恒重是指供试品连续两次干燥或炽灼后称重的差异在0.3mg以下的重量；干燥至恒重的第二次及以后各次称重均应在规定条件下继续干燥1小时后进行；炽灼至恒重的第二次称重应在继续炽灼30分钟后进行。
美国药典：Drying to Constant Weight— The specification “dried to constant weight” means that the drying shall be continued until two consecutive weighings do not differ by more than 0.50 mg per g of substance taken, the second weighing following an additional hour of drying.
欧洲药典：Drying and ignition to constant mass. The terms “dried to constant mass” and “ignited to constant mass” mean that 2 consecutive weighings do not differ by more than 0.5 mg, the second weighing following an additional period of drying or of ignition respectively appropriate to the nature and quantity of the residue.
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