Author : Su-Jin Ahn. … [et al.].

Source : Journal of Food Science 84(7)2019:1806-1811

Abstract : Garlic is widely cultivated and frequently used as a spice in South Korea, due to its characteristic flavor. It is rich in sulfur‐containing compounds (for example, allicin) and nonsulfur elements (for example, phosphorus and potassium). During the last few years, the cultivation area of garlic in South Korea has gradually decreased, one of the reasons being the increase in low‐priced imported garlic from China. Several studies have reported the discrimination of foods originating from different geographical areas by analyzing their physicochemical properties using various statistical methods. In this study, the differentiation of geographical origin of garlic between South Korea (60 samples) and China (41 samples) was performed by analyzing their physicochemical properties (for example, pH, soluble solid, moisture, free sugars, mineral elements, total flavonoid, and total phenolic contents) combined with statistical methods. The significant difference between domestic garlic from South Korea and imported garlic from China was investigated in terms of pH, moisture content, total flavonoid content, and all trace minerals except for manganese and magnesium. Logistic regression analysis was performed to determine the geographical origin (South Korea or China) of garlic after selecting the appropriate independent variables. As a result, the calculated logistic regression equation from the analysis of copper, iron, phosphorus, zinc, and sucrose contents could be used to determine whether the geographical origin of garlic was South Korea or China.

Subject : Garlic. Geographical origin. Logistic regression. Mineral content. Physicochemical characteristics.