• P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Determination of lead content in the plastic by ICP and AAS using HI reduction - PbSO4 dissolution method

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2004, v.17 no.5, pp.369-374




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Abstract

was decomposed with nitric acid after being carbonized by sulfuric acid. Then excess sulfuric acid and nitric acid was removed by evaporating and drying. Precipitated SO4-2 ion of PbSO4 was resolved itself into H2S by HI in hydrochloric acid and was volatilized. Then Pb+2 was dissolved and was measured by AAS and ICP. The test for reproducibility using PVC-Pb standard material (690-34610mg/kg) was conducted and the accuracy was more than 99.9% compared with the estimated concentration. The precision by AAS was 99.8% and that of ICP was 99.9%.

keywords
Plastics, Lead, Hydroiodic acid reduction, AAS, ICP


Reference

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(2000) "Directive 2000/53/EC of The European Parliament and of the Council", EU

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(2002) "Directive 2002/95/EC Restriction of the use of certain Hazardous Substance in electric and electronic equipment", EU

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BS EN 1122 Plastics. Determination of cadmium. Wet decomposition method.,

4

ISO 6101-2 Rubber - Determination of metal content - Flame atomic absorption spectrometric method,

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ASTM D3335 Standard Test Method for Low Concentrations of Lead, Cadmium, and Cobalt in Paint by Atomic Absorption Spectroscopy,

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(1960) Symposium on Microchemistry,

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Methods of Decomposition in Inorganic Analysis, CRC Press Inc

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