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2014•Journal of Anyang Normal UniversityRequires access

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

Xing Rong-hu

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Abstract

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%.

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What this paper is about

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%.

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Available abstract

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%.

Key concepts: Wine, Microwave digestion, Linear correlation, Copper, Correlation coefficient, Linear relationship, Detection limit, Inductively coupled plasma atomic emission spectroscopy

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