The present study was conducted to compare the effects of traditional and industrial methods on heavy metals concentrations in raisins. The concentration of heavy metals (cadmium, lead, nickel, copper, arsenic, and zinc) were examined in various types of raisin samples include Sultana, Golden Raisins, Shade-dried and Sun-dried raisins from Malayer city of Iran. Results showed that the mean concentrations of lead, nickel, copper, arsenic, and zinc were 0.08, 4.72, 3.07, 0.17, and 2.25 mg/kg, respectively. The concentrations of arsenic, copper, and nickel in all raisin samples were higher than the limits recommended by FAO/WHO while for zinc, and lead (80.77% of samples) was lower or in the range of the permitted values by WHO/FAO, EC, and ISIRI. Also the highest concentrations of heavy metals in raisins were observed in industrial drying methods (Sultana and Golden raisins). We identified a positive correlation between zinc and nickel in raisin samples (P < 0.01), while there was no correlation between the other elements.

进行本研究以比较传统方法和工业方法对葡萄干中重金属浓度的影响。在各种葡萄干样品中检测了重金属（镉，铅，镍，铜，砷和锌）的浓度，这些样品包括来自伊朗马德勒市的苏丹娜，金葡萄干，阴干和晒干的葡萄干。结果表明，铅，镍，铜，砷和锌的平均浓度分别为0.08、4.72、3.07、0.17和2.25 mg / kg。所有葡萄干样品中的砷，铜和镍的浓度均高于粮农组织/世卫组织建议的限量，而锌和铅（样品的80.77％）低于或低于世卫组织/粮农组织的允许值， EC和ISIRI。在工业干燥方法（苏丹娜和金色葡萄干）中，葡萄干中的重金属含量也最高。我们发现葡萄干样品中的锌和镍之间呈正相关（P  <0.01），而其他元素之间没有相关性。