Micronutrient composition of grape growing in Dagestan

• Z.K. Bakhmulaeva
• S.A. Magadova

Abstract

Micronutrient content in Pearl Zala, Pearl Saba, Creamy, and Amber Muscat varieties of grape has been determined. The ultimate analysis has been made by the atomic-absorption flame photometry; ascorbic acid has been determined by the titrometric analysis; rutin, niacin, and carotene have been studied by the colorimetric method. It has been found that the content of potassium (2673,8 mg/kg), calcium (349,0 mg/kg), iron (35,9 mg/kg), silicon (611,3 mg/kg), manganese (0,89 mg/kg) and vitamin C (5,3 mg/dm3) was the highest in Pearl Zala grapes, while the content of zinc (0,31 mg/kg), nicotinic acid (10,9 mg/dm3) and carotene (0,33 mg/dm3) was the highest in Pearls Saba. Amber Muscat grape has been found to have the highest concentration of sodium (151,4 mg/kg), phosphorus (466,8 mg/kg ), magnesium (221,6 mg/kg), aluminum (68,5 mg/kg), cobalt (0,120 mg/kg) and copper (1,91 mg/kg) in comparison with other grape varieties. It has been found that the content of ascorbic acid and rutin differ 1,5–1,6 fold, of magnesium, iron, silicon and potassium – 1,7–1,8 fold, of calcium and phosphorus – 2,2–2,5 fold, carotene – 4,1 times, aluminum, sodium and nicotinic acid – 4,7–5,5 fold, cobalt and copper – 8,6–8,7 fold, zinc and manganese – 10,3–22,2 fold.

Keywords:minerals, trace elements, vitamins, grape

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