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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2020, Vol. 42 ›› Issue (3): 350-.doi: 10.19802/j.issn.1007-9084.2019102

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Determination of heavy metal lead in soybean and rice use a multi-walled carbon nanotube/Nafion modi⁃fied electrode by stripping voltammetry

  

  1. 1. School of life Science, Hubei University, Wuhan 430062, China; 2. Oil Crops Research Institute, Chinese Academy of Agricultural Science, Wuhan 430062, China; 3. Quality Inspection and Test Center for Oilseeds Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
  • Online:2020-06-28 Published:2020-06-05

Abstract:

A multi-walled carbon nanotube/Nafion modified electrode for determination of heavy metal ionlead in soybean and rice by stripping voltammetry was established. The linear regress equation was y = 4.66x+46.19, with correlation coefficient of 0.994. The detection limit was in the range of 0.1~20 μmol/L. The recoveries of lead in the soybean were in the range of 99.50% ~ 100.37%, with RSD less than 5.63%.The recoveries of lead in the rice were in the range of 98.75% ~ 101.25%, with RSD less than 5.63%.The method was applied to the detection of heavy metal ion lead in soybean and rice .It has safeguard effect to grain and oil products.

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