Voltammetric Determination of Copper and Lead in Gasoline Using Sample Preparation as Microemulsions
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- CARDOSO Carlos E.
- Natural and Technological Science Center, Universidade Severino Sombra Department of Chemistry, Pontifícia Universidade Católica do Rio de Janeiro (PUC/RJ)
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- PACHECO Wagner F.
- Department of Chemistry, Pontifícia Universidade Católica do Rio de Janeiro (PUC/RJ)
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- SARUBI Rangel
- Natural and Technological Science Center, Universidade Severino Sombra
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- RIBEIRO Márcio L. N.
- Natural and Technological Science Center, Universidade Severino Sombra
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- FARIAS Pércio A. M.
- Department of Chemistry, Pontifícia Universidade Católica do Rio de Janeiro (PUC/RJ)
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- AUCÉLIO Ricardo Q.
- Department of Chemistry, Pontifícia Universidade Católica do Rio de Janeiro (PUC/RJ)
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A voltammetric method for the determination of Cu(II) and Pb(II) in gasoline using sample preparation as three-component solutions (gasoline:propan-1-ol:water, 25:60:15 v/v/v) is proposed. HNO3 was employed as a supporting electrolyte and to allow the use of aqueous inorganic standards for calibration, even if the analyte species originally in gasoline is present as a metallo-organic form. A square-wave anodic sequential determination was used by measuring the stripping current of Cu(II) (at +104 mV) using a glassy carbon electrode (GCE) and, in a second run, measuring the Pb(II) stripping current (at -470 mV) using a bismuth-film deposited on the surface of the GCE. The method allowed the quantification of 1.7 × 10-9 mol L-1 of Cu and 1.4 × 10-10 mol L-1 of Pb employing a 1500-s accumulation time. Recovery tests using analyte spiked three-component solutions prepared with commercial gasoline samples enabled recoveries of Cu and Pb from 97 ± 8 to 102 ± 5%.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 23 (9), 1065-1069, 2007
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204256360448
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- NII論文ID
- 130004441532
- 10019747002
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- NII書誌ID
- AA10500785
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 8890866
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 使用不可