RESUMO
Forty domestic and imported brands of bottled water were purchased in Manitoba, Canada and examined for total dissolved solids (TDS), chloride, sulfate, nitrate-nitrogen, cadmium, lead, copper, and radioactivity. The samples showed great variation in quality, and some exceeded the Canadian Water Quality Guidelines for drinking water for TDS, chloride, and lead. Carbonation, ozonation, and type of packaging were not associated with differences in metal levels, although carbonated samples tended to show higher TDS values. A number of deficiencies were found with respect to product labeling.
Assuntos
Metais Pesados/análise , Abastecimento de Água/análise , Cloretos/análise , Coleta de Dados , Guias como Assunto , Humanos , Manitoba , Águas Minerais , Rotulagem de Produtos , Saúde PúblicaRESUMO
Samples of wild rice grains available for sale in Manitoba, Canada contained < 0.01-6.2 micrograms/g cadmium, < 0.01-6.7 micrograms/g lead, and 1.6-14.4 micrograms/g copper. Rice originating from Saskatchewan and northern Manitoba contained significantly higher copper concentrations than samples from Ontario and southeastern Manitoba. Larger and heavier grains contained higher lead concentrations per unit weight. Mean content of all three metals per individual grain was exponentially correlated with grain size and weight. Total soluble carbohydrate and soluble protein concentrations were negatively correlated with copper concentrations.
