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Related Experiment Videos

Lead in wine

A Kaufmann1

  • 1Schuler Weine, Weinanalytik, Seewen, Switzerland.

Food Additives and Contaminants
|October 9, 1998
PubMed
Summary
This summary is machine-generated.

Brass alloys are the primary source of elevated lead levels in wine, not leaded gasoline or bottle capsules. Wine color and vintage significantly impact lead concentration more than wine age.

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Area of Science:

  • Environmental Science
  • Food Science
  • Analytical Chemistry

Background:

  • Elevated lead levels in wine have been attributed to various sources, including leaded gasoline, tin-lead capsules, and brass alloys.
  • Previous research suggested potential links between wine age and lead concentration.

Purpose of the Study:

  • To identify the primary sources of lead contamination in wine.
  • To investigate the influence of wine age, vintage, and color on lead concentration.
  • To confirm or refute the role of leaded gasoline and tin-lead capsules in lead contamination.

Main Methods:

  • Analysis of lead concentrations in 7000 wine samples.
  • Statistical analysis to determine correlations between lead levels and potential contamination sources (leaded gasoline, tin-lead capsules, brass alloys).

Related Experiment Videos

  • Evaluation of the impact of wine age, vintage, and color on lead concentration.

    • Main Results:

    • Atmospheric pollution from leaded gasoline was ruled out as a significant source of lead in wine.
    • Tin-lead capsules showed only a minor influence on lead concentration, regardless of their presence or corrosion state.
    • While a correlation between wine age and lead concentration was observed, statistical analysis identified wine color and vintage as more significant factors. Wine age itself was not a significant predictor after controlling for these variables.
    • Brass alloys were identified as the main contamination source, with brass tubes and faucets found in wineries with high lead levels.

    Conclusions:

    • Brass alloys, particularly from winery equipment like tubes and faucets, are the principal source of lead contamination in wine.
    • Wine color and vintage are more influential on lead concentration than wine age.
    • Lead levels in wine have shown a significant decreasing trend over the past seven years.