Determination of heavy metal content of grape juice concentrate

Author(s): Ali Mohamadi Sani

Grape juice concentrate (GJC) is evaporated, concentrated and shelf-life extended formof grape syrup. In the traditional production, a certain white soil is used as the clarifier material in the production of GJC which may deliver some heavy metals to the final product. So this study aimed to determine some heavy metals in GJC samples produced by traditional method. For this purpose twenty GJC samples were supplied from local supermarkets of 9 cities in Khorasan province in Iran. Heavy metals includingArsenic, Lead,Mercury, Cadmium, Tin, Calcium,Magnesiumand Ironwere determined byASSmethod. The average content of thementioned metals detected as follows: Arsenic 8.2 ppb, Lead 36.6 ppb, Mercury 1.4 ppb, Cadmium0.37 ppb, Tin 4.9 ppm, Calcium817 ppm;Magnesium1704 ppmand Iron 60ppm. These results show that GJC is nutritious because of the Mg and Fe content, but a risk of heavy metal poisoning also exist.

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