辽宁石油化工大学学报2012，Vol.32Issue(2)：32-34,3.DOI:10.3696/j.issn.1672-6952.2012.02.009
方波阳极溶出伏安法测定大米中的痕量镉
The Application of Square Wave Anodic Stripping Voltammetry to Measure the Trace Mount of Cadmium in Rice
万素娟 1栾景合 1陈平 1阎松1
作者信息
- 1. 辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001
- 折叠
摘要
Abstract
Rice were grounded into rice powder by muller and soaked in mixed acid solution (concentrated nitric acid: concentrated sulphuric acid = 3 : 2) for 12 hours. Then, the mixture was heated slowly in a hood, and mixed acid solution and aqueous hydrogen peroxide solution were added for the digestion. In order to test the trace amount cadmium in rice with square wave stripping voltammetry method, a three - electrode system are used with the silver -hased mercury film electrode as working electrode, platinum electrode as counter electrode, and saturated calomel electrode as reference electrode. The results show that a good linear relationship can be obtained in pH = 3. 0 NH4C1 (0. 2 mol/L) substrate solution, within the concentration of cadmium 0. 01 ~ 0. 12 μg/mL; the regression equation was Ip =497. 59c-15. 324 with the correlation coefficient of 0. 994 1, the detection limit of 4. 607 4× 10-3 μg/mL, the relative standard deviation of 4. 12%-5. 56% , and the recovery rate of 90. 26% ~98. 16%.关键词
方波阳极溶出伏安法/大米/镉Key words
Square wave stripping voltammetry/ Rice/ Cadmium分类
化学化工引用本文复制引用
万素娟,栾景合,陈平,阎松..方波阳极溶出伏安法测定大米中的痕量镉[J].辽宁石油化工大学学报,2012,32(2):32-34,3.
