有效数字问题,在药典标准中一直有争议,中国药典1990年版“凡例”中已有所规定,但在正文与附录中,仍有不少有待明确和统一之处。只有实测数据及其运算结果(因具有一定的误差)方发生有效数字的问题。药典制剂含量限度用“标示量的95.0～105.0%”而不是“95～105%”,这种规定实际上不只是规定了容许限,而且对测定精度也作了规定,即要求所用的测定方法必须达到规定的精度要求;其实这种“数”因是人们预先规定(指定、约定)的界限值,与测量无关,在这些数中,没有可疑数字,这里的95%、105%不存在有效数字的问题,或者说它们是准确值,其有效位数可视作有任意多位。在实际 The issue of significant figures has always been controversial in the Pharmacopoeia standards. The 1990 edition of the Chinese Pharmacopoeia has been stipulated in the “Regulations of the People’s Republic of China.” However, there are still many issues to be clarified and unified in the texts and appendices. Only the measured data and its calculation results (due to a certain error) side of the effective number of issues. The limit of the pharmacopoeia dosage is 95.0-105.0% of the indicated amount instead of 95-105%. In fact, this regulation not only stipulates the allowable limit, but also defines the measurement accuracy, that is, the measurement method used In fact, this “number” because of people prescribe (specify, agreed) threshold value, has nothing to do with the measurement, in these numbers, there is no suspicious figures, where 95%, 105% does not exist effective The problem with numbers, or the exact value they are, can be thought of as any number of significant digits. In fact