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甘草霜中的甘草酸目前一直沿用《中华人民共和国药典》中常量法测定,既繁琐又费时。本文采用红外光谱直接定量法,不仅免去了化学前处理,简便省时,还防止了预处理带来的被测组份的污染损失。 1.仪器与试剂 P-E983红外分光光度计、3600数据站,660打印机,AD-2Z百万分之一感量电子天平。溴化钾(分析纯)。甘草酸标准品(按《中华人民共和国药典》中常量法提纯精制),纯度94.3％。 2.实验方法
Glycyrrhizin licorice cream currently used in the “People’s Republic of China Pharmacopoeia” Determination of the constant method, both cumbersome and time-consuming. In this paper, direct quantitative infrared spectroscopy, not only eliminates the need for chemical pretreatment, simple and save time, but also to prevent pretreatment of the components of the pollution caused by pollution. 1. Instruments and reagents P-E983 infrared spectrophotometer, 3600 data station, 660 printer, AD-2Z one millionth percentile electronic balance. Potassium bromide (analytical grade). Glycyrrhizic acid standard (according to the “People’s Republic of China Pharmacopoeia” constant purification purification), purity 94.3%. 2 experimental methods