Cadmium content in dyed dried-shrimps and non-dyed dried-shrimps

Purposes of this investigation are: (1) analyses of cadmium content in non-dyed dried-shrimps (2) analyses of cadmium content in dyed dried-shrimps. The samples were collected from 10 markets in Bangkok by randomized sampling during October, December 1988 and February 1989. There were 120 samples of dyed dried-shrimps and the samples of non-dyed dried-shrimps. By duplicated, the total of the sample were 240 samples. The samples were prepared for cadmium determination by mixed acid digestion (HNO3:HCLO4 5:2). The cadmium content was detected by using an atomic absorption spectrophotometer. The results were analyed by analysis of variance. Then maked t-test when the results significant difference. The analysis showed that there were cadmium in the rang of 0.02-0.04 ppm in non-dyed dried-shrimps; and 0.02-0.12 ppm in dyed dried shrimps. It is presumed that the cadmium content in dyed dried-shrimps were more than in non-dyed-shrimps by significant difference. (P0.05). The cadmium content in dried-shrimps were highly significant difference between the months. (P0.01). It showed:FebruaryDecemberOctober. The average concentration of cadium during October, December and February in the non-dyed dried-shrimps were 0.0215, 0.0280 and 0.0320 ppm respectively; and in the dyed dried-shrimps were 0.0265, 0.0310 and 0.0375 ppm respectively. The cadmium content in dyed dried-shrimps were highly significant difference between the markets. The maximum and minimum amount of cadmium in dyed dried-shrimps from the market were 0.0467 and 0.0267 ppm respectively. This research could be summerized that the cadmium content in dyed dried-shrimps were more than in non-dyed dried-shrimps. But the concentrations in all sample did not excess the tolerance limit prescribed by The National Health and Medical Research Council. The maximum allowance for cadmium content in food were 2 ppm. Although, the cadmium content in dyed dried-shrimps were a little. But it was found that the dyes could make the cadmium content in food upper. Because of the accumulation of cadmium in body make worst to health. Therefore, the consumers must be avoid to eat dyed-food.