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KMID : 0950020070330010031
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Journal of Health Science & Medical Technology
2007 Volume.33 No. 1 p.31 ~ p.38
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A study for the elution of heavy metals in container
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Lee Kyung-Hee
Choi Dal-Woong
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Abstract
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For safety of processed food such as canned food, we need studies about heavy metal pollution that can be caused by the processed container as well as content of the heavy metals in the food itself. Although there are many studies about the content of heavy metals in food, those about heavy metal elution from a container are few. Here what is important is not only the elution during the distribution and preservation period of the processed food but also that during the food keeping period after opening. The metal corrosion can be promoted after opening more than in a closed canned status. Thus this study conducted an experiment about heavy metal elution of a can container when kept after opening. First of all, oil of canned tuna was collected after 3 weeks from opening. It was pretreated in a microwave and diluted in a proper concentration to measure a degree of heavy metal elution with ICP-MS, including content changes of major heavy metals such as aluminium(Al), chromium(Cr), nickel(Ni), copper(Cu), Zinc(Zn), Arsenic(As), selenium (Se), cadmium(Cd) and lead(Pb). There was no difference of content before and after opening for Al, Se and Pb. Ni and Cr were increased a little bit but had no statistically significance due to a big standard deviation. Heavy metal contents of Cu, Zn, As and Cd were reduced by opening but without a statistical significance. The 3-week period could not cause elution of heavy metal from can container in a statistically significant level. Ni and Cr had a possibility of elution in an insignificant level. Therefore a future study can find elution in a significant level by lengthening the opening period or increasing the number of samples. Also, food pollutants as well as heavy metal elution of agricultural and fishery canned food can be a good topic for future studies. Finally, possible research topics include mechanism about increase of decrease of heavy metal contents by long-term keeping after opening.
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KEYWORD
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elution, heavy metals, canned goods
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