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Sun J.-F.,Nanjing Southeast University | Wang C.-N.,Nanjing Southeast University | Wu Y.-N.,China National Institute for Nutrition and Food Safety | Yuan B.-J.,Center for Diseases Control and Prevention of Jiangsu Province | And 3 more authors.
Food Additives and Contaminants - Part A Chemistry, Analysis, Control, Exposure and Risk Assessment | Year: 2011

Deterministic and probabilistic estimates of the chronic exposure to lead (Pb) for the inhabitants in Jiangsu Province, China, were performed. Pb contamination data were obtained from the national food contamination monitoring programme during 2001-2006 and 2600 samples from 38 commodities in Jiangsu were included. Food consumption data were from the national diet and nutrition survey conducted in 2002, including 3879 subjects aged 2-80 years and 185 children aged 2-6 years in Jiangsu. Contributions from 38 commodities were included in the calculations. Using the provisional tolerable weekly intakes (PTWI) divided into daily intakes (PTWId) of 3.57 μgkg -1 bwday -1 in the risk assessment, exposures calculated by the deterministic approach for children and the general population were 77% and 43% of the PTWId, respectively, which were nearly similar to the mean intake calculation in the probabilistic approach. The percentage of people whose exposure level exceeded the PTWId for children, the general population, urban population and rural population were 16%, 0.4%,0.1%, and 0.5%, respectively. The 50th, 95th and 99th percentiles of Pb exposure for children were 2.6, 4.4 and 5.5 μgkg -1 bwday -1, respectively. Rice followed by wheat flour and bean products contributed most to the total Pb intake for both children and the general population. This study indicated that the Pb dietary exposure in Jiangsu Province, especially for children, would be a public health concern. © 2011 Taylor & Francis.

Sun J.,Nanjing Southeast University | Wang C.,Nanjing Southeast University | Song X.,Nanjing Southeast University | Wu Y.,China National Institute for Nutrition and Food Safety | And 2 more authors.
International Journal of Hygiene and Environmental Health | Year: 2011

Dietary intakes of mercury by children and adults in Jinhu area of China were determined using a duplicate diet approach. A total of 176 duplicate diet portions were collected from 60 individuals in November and December of 2007. Mercury levels in duplicate samples were measured by atomic fluorescence spectrometry. The daily mercury intakes (median and range) from consumption days without fish or shellfish for children and adults were 0.13 (0.05-0.78) μg(kg bw) -1day -1 and 0.07 (0.04-0.18) μg(kg bw) -1day -1, respectively, which were significantly lower than those from consumption days with fish or shellfish for both children and adults whose daily intakes (median and range) were 0.16 (0.11-0.84) μg(kg bw) -1day -1 and 0.09 (0.05-0.46) μg(kg bw) -1day -1, respectively. The exposure level of children was significantly higher than that of adults. The 50th and 99th percentile of the usual mercury intake from all consumption days for children were 0.14 and 0.22μg(kg bw) -1day -1 and for adults were 0.09 and 0.14μg(kg bw) -1day -1, where the between-person variance in dietary mercury intake for children and adults were 0.038 and 0.036, respectively. Comparing with the provisional tolerable weekly intake (PTWI) divided into daily intake (PTDI) of 0.57μg(kg bw) -1day -1, it is concluded that the average daily intakes and the usual intakes to mercury can be considered safe for both children and adults in Jinhu area by the duplicate diet study. But the maximum daily intakes for children exceeding the PTDI deserve a close attention. © 2011 Elsevier GmbH.

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