Evaluation of Some Physicochemical Indicators of Black Pepper Purchased from Main Growing Areas in Vietnam ☆

This study aims to evaluate several physicochemical indicators of black pepper samples purchased from three growing regions: Quang Tri, Ba Ria-Vung Tau, and Dak Lak. The results of ANOVA analysis at α = 0.05 reveals significant differences in moisture content, total ash content, piperine content, and essential oil content among the pepper samples from these three regions. The results obtained by Principal Component Analysis (PCA) identify the characteristic physicochemical indicators for Dak Lak pepper samples as moisture content, piperine content, and essential oil content. In contrast, Quang Tri pepper samples are characterized by moisture, total ash, piperine, and essential oil content. These findings not only demonstrate a correlation between the physicochemical index of black pepper and the factors associated with its growing regions, but also highlight their practical implications for the cultivation and quality control of black pepper across different regions.