FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (10): 458-460.

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Determination of Trace Copper by Differential Spectrophotometry with Sodium Diethyldithiocarbamate

 WEI  Xin-Jun, WANG  Xuan-Bing, ZHANG  Yong-Sheng, 南Hai-Juan   

  1. College of Food, Henan Institute of Science and Technology, Xinxiang 453003, China
  • Online:2007-10-15 Published:2011-11-22

Abstract: In this research, the conventional determination method of trace copper by sodium diethyldithiocarbamate spectrophotometry was improved. Using the differential spectrophotometry, the linear range was downward extended. The calibration curve was linear in the range of 0.5~10.0 μg /10 ml ( R =0.9996). In determination of content of copper in rice, the recovery rate was about 96%~103%.

Key words: differential spectrophotometry, sodium diethyldithiocarbamate, copper