Lead poisoning from homemade wine: a case study.
A 66-year-old man suffered the symptoms of severe lead poisoning for 2 years before diagnosis. The man had a blood lead level (PbB) on admission to hospital of 98 microg/dL. A detailed investigation revealed that the poisoning occurred as a result of drinking a homemade red wine, for which analyses showed a lead concentration up to 14 mg/L--70 times the Australian maximum limit for lead in wine. The source of the lead was a highly corroded enamel bathtub in which grape crushings and juice were stored for a week prior to bottling. The corrosion of the enamel surface of the bathtub had resulted in pitted patches up to 1 mm in depth along the side of the bathtub. Powdering of the tub surface was evident below a level where wine had been in contact with the sides of the tub. The homemade wine had a pH of 3.8, which would have greatly contributed to the solubilization of metals from the glaze. We conducted a test in which commercial red wine of similar pH and containing < 0.2 mg/L lead was placed in this tub for 7 days. Subsequent testing revealed a lead level of 310 mg/L. This high lead concentration is consistent with the surface area of enamel on the bathtub being in contact with a small liquid volume as in the case of the leaching test using commercial red wine. This case study highlights the importance of the use of food-grade materials for the preparation and storage of homemade beverages or food.
Mangas
S
S
Environmental Health Service, Department of Human Services, Adelaide, South Australia, Australia. sam.mangas@dhs.sa.gov.au
Visvanathan
R
R
van Alphen
M
M
D000368:Aged; D005506:Food Contamination; D018857:Food Packaging; D006795:Household Products; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry; D007855:Lead Poisoning / Q000209:etiology*; D008297:Male; D012995:Solubility; D014920:Wine
D007854:Lead