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Chinese Journal of Applied Ecology ›› 1991, Vol. 2 ›› Issue (2): 191-193.

• Articles • Previous Articles    

Catalytic wave oscillopolarographic determination of traces of lead in crops

Suo Yourui1, Huang Yali2   

  1. 1. Northwest Plateau Institute of Biology, Academia Sinica, Xining 810001;
    2. Environmental Monitoring Station of Xining, Xining 810001
  • Received:1990-09-04 Online:1991-04-25 Published:1991-04-25

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Abstract: Asensitive polarographic catalytic wave system (Pb-0.24M HCl-0.6% NaAc-0.4% KI-0.4% ascorbic acid) for determining traces of lead in crops was proposed. The peak potential is-0.34V (vs. S. C. E.). The wave for the determination of lead within the range of 0—30μg/25ml is available. The detection limit of Pb is 0.002μg/ml. Eighteen metal ions and acid radicals are not interferential. The waves are clear and steady. The recovery is 92.6—107% and the variation coefficient is less than 3.41%.

Key words: Oscillopolarographic wave, Lead, Crops