Blood lead concentrations in maternal and cord blood evaluated by two analytic methods |
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Authors: | Zentner Luz Estela Alva Rondó Patricia Helen de Carvalho Latorre Maria do Rosário Dias de Oliveira |
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Institution: | Department of Nutrition, School of Public Health, University of S?o Paulo, S?o Paulo, SP, Brazil. luzestela8@hotmail.com |
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Abstract: | In this study the authors determined the relationship between blood lead concentrations in pregnant women and newborns, using graphite furnace atomic absorption spectrometry (GFAAS) and the LeadCare System (LCS). Fifty-five pregnant women admitted for delivery from June to August 2002 at a hospital in Brazil were included in the study. Blood samples were taken from the women and from umbilical cords to determine serum lead concentrations. Only 3 women had blood lead concentrations > or = 0.48 micromol/L. There were correlations between lead concentrations in women and newborns using either GFAAS (r = 0.83, p < .001) or the LCS (r = 0.75, p < .001). However, there were no statistically significant correlations between the GFAAS and LCS methods, probably because most of the women did not have high concentrations of lead (> or = 0.48 micromol/L). Considering the discrepancy the authors found between the LCS method and the traditional GFAAS method, the authors advise against using the LCS method, especially in populations with levels of lead < or = 0.48 micromol/L. |
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