ICP OES simultaneous determination of Ca, Cu, Fe, Mg, Mn, Na, and P in biodiesel by axial and radial inductively coupled plasma-optical emission spectrometry

  • De Souza R
  • Leocádio L
  • Da Silveira C
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Abstract

A simple and rapid method for the simultaneous determination of seven
trace elements in biodiesel by axial and radial view Inductively
Coupled Plasma Optical Emission Spectrometry (ICP OES) is proposed, in
which the sample is emulsified with Triton X-100 and water, and in
which yttrium is employed as an internal standard. The better obtained
quantification limits (10 s) were by axial view, 0.165, 0.099, 0.033,
0.007, 0.016, 0.132, 0.660 mu g g(-1) for Ca, Cu, Fe, Mg, Mn, Na, and
P, respectively, based on a sample mass of 1.0 g diluted to a final
mass of 10 g in the analytical solution. Calibration was carried out
with aqueous standards, thus avoiding the use of frequently instable
organic standards. Elemental recoveries were in the range of 90 to
109% for all seven analytes studied, and also the precision of the
method was satisfactory (RSD < 8%).

Author-supplied keywords

  • Axial and radial view
  • Biodiesel
  • Emulsions
  • ICP OES
  • Trace elements

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Authors

  • Roseli Martins De Souza

  • Luiz Gustavo Leocádio

  • C. L P Da Silveira

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