On-line Solvent Extraction of lead and Zinc in Air Particulates

Authors

  • Evelyn L. Yap Department of Chemistry, University of San Carlos, Cebu City
  • Nathaniel A. Isidro Department of Chemistry, University of San Carlos, Cebu City
  • Josephine M. Castañares Department of Chemistry, University of San Carlos, Cebu City

DOI:

https://doi.org/10.26534/kimika.v16i2.53-57

Keywords:

flow injection analysis, on-line solvent extraction, zinc, lead, diphenylthiocarbazone, dithizonates

Abstract

Colored dithizone complexes, dithizonates, usually red or purple, are formed when diphenylthiocarbazone in carbon tetrachloride reacts with metals. By controlling the pH, use of buffer and complexing agents, the reaction is made specific to a certain metal. Lead and zinc can be extracted by dithizone at pH 8.5 and 4.0-5.0 respectively. This approach was used for the development of a flow injection technique for the determination of both metals.Optimized conditions were achieved at 150 µL sample volume, 10 mg/L dithizone solution and 200 cm (Zn)/300 cm (Pb) reaction coils. Lead and zinc particulate samples ranged from 0.383-0.550 µg/L and 1.15 x 10^-6-5.53 x 10^-6 µg/L respectively.

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How to Cite

Yap, E. L., Isidro, N. A., & Castañares, J. M. (2000). On-line Solvent Extraction of lead and Zinc in Air Particulates. KIMIKA, 16(2), 53–57. https://doi.org/10.26534/kimika.v16i2.53-57

Issue

Vol. 16 No. 2 (2000)

Section

Research Articles

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