FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (8): 149-152.

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Simutaneous Determination of Microamounts of Zn、Fe、Mn in Arimillaria Mellea by Single Sweep Polarography

 LI  Qiao-Yun, CHEN  Ai-Ying, JU  Hong-Fang, JI  Hai-Yan   

  1. Department of Chemistry, Changshu Science and Technology College
  • Online:2004-08-15 Published:2011-10-24

Abstract: A method for the determination of Zn、Fe、Mn simultaneously in a supporting solution of 0.4mol/LethyLenediamine、2.5×10-3mol/L triethanolamine and 0.1mol/L potassium thiocyanate by single sweep polarography hasbeen established. The peak potentials were -1.46Zn、-1.69V Fe、-1.78V Mn (υs.SCE). The peak heights were linearlyproportional to the concentration of iron over the range of 0.2~1.2μg/ml Zn、 0.2~1.6μg/ml Fe、0.04~0.5μg/ml Mnrespectively. The detection limits were 0.015μg/ml for Zn、 0.024μg/ml for Fe、0.018μg/ml for Mn. This method wasaccurate, simple and fast with high selectivity.

Key words: single sweep polarography, zinc, iron, manganese, arimillaria mellea..