Metal Concentrations in Grape Spirits

  • T. N. van Wyk Agricultural Research Council
  • F. van Jaarsveld
  • O. J. Caleb

Abstract

Metals are a necessity for human health as they play significant roles in biological systems. However,
contamination of food and beverages by heavy metals such as lead (Pb), iron (Fe), chromium (Cr), cadmium
(Cd), copper (Cu), cobalt (Co), Nickel (Ni) and zinc (Zn) is a major public health problem in developing
countries. In this study we evaluated the levels of Li, Be, B, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr,
Mo, Cd, Sb, Ba, Hg and Pb in grape spirits, including pot still spirit, neutral wine spirit and commercial
brandies. Interesting variations in the levels of metals was observed. Factors such as origin and type of
spirits influenced levels of metals in spirits. These differences in some metal levels such as copper can
be used to determine possible adulteration and in authenticity assessments of brandies. Surprisingly the
commercial brandies had higher metal concentrations when compared to pot still spirit and neutral wine
spirit. Unmatured pot still spirit had the highest copper levels. Our study shows that generally the metal
levels in most of the commercial brandies were within permissible limits.

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Author Biographies

T. N. van Wyk, Agricultural Research Council

Postharvest and Agroprocessing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch

F. van Jaarsveld

Postharvest and Agroprocessing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch

O. J. Caleb

Postharvest and Agroprocessing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch

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Published
2021-04-16
Section
Articles