封蜡密度测定法测定矿物药及其煅制品的密度

Determination of densities of mineral drugs and their calcined products by sealing wax densimetry

目的:用封蜡密度测定法测定中药常见矿物药及其煅制品的密度,研究和建立中药煅制品松(酥)脆程度的检测方法。方法:以密度为检测指标,考察直接密度测定法、封蜡密度测定法测定矿物药及其煅制品密度的准确度,优选密度测定方法。结果:直接密度测定法与封蜡密度测定法测得的自然铜生品、赭石生品、煅自然铜、煅赭石的密度有显著的差异(P<0.01),直接密度测定法比封蜡密度测定法测得的自然铜生品、赭石生品、煅自然铜、煅赭石的密度平均增加1.66%,9.43%,96.72%,9.02%。结论:直接密度测定法不适用于矿物药及其煅制品的密度测定,而封蜡密度测定法准确度高,较适用于矿物药及其煅制品的密度测定。

Objective： To determine densities of mineral drugs and their calcined products by using sealing wax densimetry, and to establish the testing method of crispness for calcined traditional Chinese medicine. Method： Taking density as detection indicator, the accuracies of mineral drugs and their calcined products were investigated by sealing wax densimetry compared with direct densimetry, and the method of density determination was optimized. Result： The density values measured by two methods investigated above were significantly different （P 〈0. 01 ）, the density values of Pyritum, Haematitum, calcined Pyritum and calcined Haematitum measured by direct densimetry were increased 1.66%, 9. 43%, 96. 72% and 9.02%, respectively compared with that measured by sealing wax densimetry. Conclusion ： Sealing wax densimetry is suitable for the density determination of mineral drugs and their calcined products with its high accuracy, whereas direct densimetry＇is not suitable for the density determination of mineral drugs and their calcined products.