Lead and cadmium in some cereal products on the Finnish market 1990–91
作者:
R. Tahvonen,
J. Kumpulainen,
期刊:
Food Additives & Contaminants
(Taylor Available online 1993)
卷期:
Volume 10,
issue 2
页码: 245-255
ISSN:0265-203X
年代: 1993
DOI:10.1080/02652039309374146
出版商: Taylor & Francis Group
关键词: lead;cadmium;cereals;cereal products
数据来源: Taylor
摘要:
Lead and cadmium contents were determined in representatively collected (commercial mills, wholesalers) samples of rye flour, breakfast cereals, porridge flakes, muesli cereals and pasta products. The samples were digested by heating them overnight in concentrated HNO3. Lead and cadmium concentrations were determined by GFAAS using a platform and (NH4)?2?O4as a matrix modifier. ARC/CL coded wheat flour and other reference materials (NBS 1567a, BCR no. 189, BCR no. 191) were employed for the analytical quality control. Lead and cadmium contents found in the above samples were generally much lower than the present tolerance limits in Finland (300μg/kg and 100μg/kg respectively). The mean cadmium and lead contents of rye flours studied were very low, being 9μg/kg and 16μg/kg respectively. The mean contents of lead and cadmium in wheat‐based breakfast cereals were 22 and 42, in rye products 19 and 26, in oats 17 and 2, in maize products 11 and 18 and in rice products 31 and 10μg/kg, respectively. The mean contents of lead and cadmium in muesli cereals were 34 and 27μg/kg. Remarkably high cadmium contents were found in some pastas made from imported durum wheat. The mean cadmium content of all past products was 79μg/kg with a range of 26–182μg/kg. Lead contents were low, with a mean of 18μg/kg, and a range of 8 to 66μg/kg. Cereals contribute about 59% of the average total dietary cadmium intake in Finland. Nearly 60% of the total cereal consumption is wheat and 27% rye. Since rye has a lower cadmium content than wheat, rye is preferable to wheat. About 15% of lead is derived from cereals. As the total intake of heavy metals is very low in Finland, there is no need to alter cereal consumption.
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