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Classification of Various Bottled Mineral Waters Marketed in Djibouti

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Document pages: 19 pages

Abstract: In this study, 19 different brands of bottled mineral water (7 local brands and 12 imported brands) were collected from supermarkets and independent food stores throughout Djibouti. The chemical composition mentioned on the label of 19 bottles of mineral water has been verified for the first time by ion balance error (IBE). Among the 19 selected brands, 12 brands (2 local brands and 10 imported brands) were found to have acceptable cost balance errors. The data collected from bottled water labels were analyzed by correlation analysis (CA), principal component analysis (PCA) and hierarchical cluster analysis (HCA). The results show that the study waters of 12 brands can be divided into 4 different categories with similar chemical characteristicsics. Two local and one imported brands have the same chemical composition but marketed under different names. It was observed that the chemical content local water brands were within the normal range prescribed by both WHO and USEPA except five imported water brands that have concentration values Ca, HCO3, Mg and SO4 beyond acceptable standards. Total hardness values classified most of the studied brands from moderate to very hard water.

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