ICP-AES微波消解法测定进口葡萄酒中的铁和铜离子

Determination of Copper and Iron in Import Grape wine by ICP-AES with Microwave Digestion

采用微波消解法-电感耦合等离子体发射光谱法测定葡萄酒中的铁和铜的含量。本方法与传统的火焰原子吸收方法相比,具有线性范围宽、检出限低、灵敏度高、快速、简便等特点。实验结果表明：样品量控制在2.5 mL、消解液总量控制在6 mL,程序升温的最佳温度为185℃。铁在0～0.8μg·mL-1检测范围内呈线性关子,线性相关系数为0.9992;铜在0～1.2μg·mL-1检测范围内呈线性关系。线性相关系数为0.9998。铁、铜相对标准偏差分别为0.73%～0.82%、1.66%～1.74%,铁、铜的加标回收率分别在93.33%～97.33%、92.00%～96.40%之间。

The copper and iron in import grape wine were detected by ICP-AES with microwave digestion. Compared with traditional method-AAS,this method has many advantages,for example： wide linear range,low detection limit,high sensitivity, rapid,simple and convenient. The experiment results indicated that optional experimental conditions are as follow： the amount of sample was 2. 5 mL,the amount of digestion liquid was 6 mL,the best temperature was 185℃. Good linear relationship of Fe was observed in the range of 0-0. 8 μg·mL-1with correlation coefficient was 0. 9992. Good linear relationship of Cu was observed in the range of 0 ～ 1. 2 μg·mL-1with correlation coefficient was 0. 9998. The average recovery of Fe and Cu was 93. 33% ～ 97. 33% and 92. 00% ～ 96. 40% with RSD of 0. 73% ～ 0. 82% and 1. 66% ～ 1. 74%.