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Related Experiment Videos

Trace element determination in vitamin E using ICP-MS.

Claudia A Ponce De León1, Maria Montes Bayón, Joseph A Caruso

  • 1Department of Chemistry, University of Cincinnati, OH 45221, USA.

Analytical and Bioanalytical Chemistry
|September 27, 2002
PubMed
Summary
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Synthetic vitamin E may contain trace metal contaminants. Acid microwave digestion offers slightly lower detection limits for elements like chromium, nickel, tin, and lead compared to emulsion preparation.

Area of Science:

  • Analytical Chemistry
  • Food Chemistry
  • Materials Science

Background:

  • Vitamin E is available from plant sources (tocopherols) or synthetic production.
  • Synthetic vitamin E production involves catalysts, potentially introducing trace element contamination.
  • Detecting trace elements in oily vitamin E samples requires specialized sample preparation for techniques like ICP-MS.

Purpose of the Study:

  • To compare acid microwave digestion and emulsion preparation for trace metal analysis in synthetic vitamin E.
  • To determine the presence and concentration of specific trace metals in synthetic vitamin E samples.
  • To support synthetic vitamin E manufacturers in assessing product purity.

Main Methods:

  • Comparison of two sample preparation techniques: acid microwave digestion and emulsion preparation.

Related Experiment Videos

  • Analysis of trace elements using Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
  • Quantification of chromium, nickel, tin, and lead concentrations.

    • Main Results:

    • Trace amounts of chromium (200 ppb), nickel (60 ppb), tin (9 ppb), and lead (45 ppb) were detected in the analyzed synthetic vitamin E.
    • Acid microwave digestion yielded slightly lower detection limits compared to emulsion preparation.
    • Both methods were effective in preparing oily vitamin E samples for ICP-MS analysis.

    Conclusions:

    • Synthetic vitamin E can be contaminated with trace metals such as chromium, nickel, tin, and lead.
    • Acid microwave digestion is a suitable and effective method for sample preparation in trace metal analysis of synthetic vitamin E.
    • Accurate quantification of trace elements is crucial for ensuring the purity and safety of synthetic vitamin E supplements.