Lead content of dietary calcium supplements available in Brazil
| Autor: | Clarissa P. Frizzo, Erico M.M. Flores, V. L. Dressler, Taís Cristina Unfer, Paula Rossini Augusti, Tatiana Emanuelli, M. Hahn, Julio Cezar Paz de Mattos, Greicy M.M. Conterato |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Oyster
Health Toxicology and Mutagenesis chemistry.chemical_element Food Contamination Calcium Toxicology Bone meal law.invention Calcium Carbonate chemistry.chemical_compound Animal science law biology.animal Animals Humans Magnesium Detection limit Biological Products Minerals biology Spectrophotometry Atomic Public Health Environmental and Occupational Health General Chemistry Ostreidae Calcium Dietary chemistry Lead Chemistry (miscellaneous) Environmental chemistry Dietary Supplements Atomic absorption spectroscopy Citric acid Brazil Food Science Food contaminant |
| Zdroj: | Food additives and contaminants. 23(2) |
| ISSN: | 0265-203X |
| Popis: | The lead and calcium content of calcium supplements available in Brazil were determined by graphite furnace and flame atomic absorption spectrometry, respectively. Samples were microwave-digested in concentrated HNO(3). Citric acid was used as a chemical modifier in the lead analysis. Supplements were classified into six categories: oyster industrialized (OI, n=4), oyster prepared in pharmacy (OP, n=3), refined industrialized (RI, n=6), refined prepared in pharmacy (RP, n=3), bone meal (B, n=3), and dolomite (D, n=4). Lead levels (microg g(-1) of measured calcium) were higher in D products (2.33), followed by OI, RP, OP, and RI products (1.46, 1.32, 1.29, 0.75), while B products had levels lower than the limit of quantification (0.02 microg g(-1) unit weight). Daily lead intake of eight supplements exceeded the limit of California, USA (1.5 microg g(-1) calcium), but none exceeded the federal limit of USA (7.5 microg g(-1) calcium) or the provisional tolerable lead intake by FAO/WHO (25 microg kg(-1) per week). |
| Databáze: | OpenAIRE |
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