Abstract This study describes an electrochemical alternative to quantify metals in biodiesel, since this matrix present a complex structure. This methodology use Square Wave Anodic Stripping Voltammetry (SWASV) associated with an unmodified boron-doped diamond (BDD) electrode to determine Pb(II) and Cu(II) in microemulsified biodiesel. The procedure was applied in samples of biodiesel from corn oil, allowing finding a LOD of 2.70 × 10−8 and 4.00 × 10−9 mol L−1 for Pb(II) and Cu(II), respectively, with satisfactory recovery values (95.8 to 118.1%) which are comparable with other convetional analysis described in the literature.

中文翻译：

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掺硼金刚石电极测定微乳化生物柴油中的 Pb(II) 和 Cu(II)

摘要 本研究描述了一种用于量化生物柴油中金属的电化学替代方法，因为该基质具有复杂的结构。该方法使用方波阳极溶出伏安法 (SWASV) 和未改性的掺硼金刚石 (BDD) 电极来测定微乳化生物柴油中的 Pb(II) 和 Cu(II)。该程序应用于来自玉米油的生物柴油样品，发现 Pb(II) 和 Cu(II) 的 LOD 分别为 2.70 × 10−8 和 4.00 × 10−9 mol L−1，回收率令人满意（ 95.8 到 118.1%），这与文献中描述的其他常规分析相当。