The invention discloses a detection method for evaluating the quality of a colquhounia root medicinal material. The detection method comprises the following steps: 1) taking peeled dry colquhounia roots for later use; 2) performing
powder microscopic identification; 3) determining the nature of epicatechin by using a thin-layer
chromatography test method; 4) checking the
moisture, the total ash content and the acid-insoluble ash content, and determining a water-
soluble extract; 5) determining the epicatechin content and the
triptolide content of the colquhounia roots. According to the method,through the following steps: preliminarily screening out raw materials through character observation; performing microscopic identification by
powder, and observing the microscopic characteristics ofthe colquhounia roots; then checking the
moisture, the total ash content and the acid-insoluble ash content; performing primary determination of
impurity content; extracting the medicinal materials, measuring the extract, preliminarily determining the extractability of the effective components of the medicinal materials, and accurately quantifying the conditions of the main components of epicatechin and
triptolide by
high performance liquid chromatography, thereby comprehensively judging the quality of the colquhounia roots. The method is beneficial to prejudging the clinical
medication risk and ensuring the safety and effectiveness of clinical medication.