Screening of five specified raw materials in several imported commercially available processed foods using immunochromatography kits
2004
Suzuki, T. (Japan Frozen Food Inspection Corp., Tokyo) | Matsuura, K. | Maeda, M. | Nagasaki, T. | Segami, S. | Watanabe, M. | Watanabe, K. | Shiroyanagi, R. | Nishida, K. | Toyoda, M.
We purchased ten imported processed foods commercially available at supermarkets and retails in Metropolis of Tokyo and Kanagawa prefecture and qualitatively analyzed whether five specified raw materials were present in those by using immunochromatography based on the instructions of the kit (NANO TRAP : ROHTO Pharmaceutical Co., Ltd.). Those processed foods were also quantitatively analyzed to see if the specified raw materials were included by using ELISA kits (Morinaga Institute of Biological Science), and both results were compared to study usefulness of the immunochromatography assay. Good correlation was obtained in all test kits except Karinto with difficulty in measurement and 10 microgram/g or more of all the specified ingredients were detected in both ELISA and immunochromatography. There were false-positive results slightly in cookies, potato chips, chocolates, caramels, cakes, noodles, nuts, shrimp rice crackers, and ice cream using the immunochromatography assay. Our study showed that immunochromatography was useful in simply screening presence or absence of specified raw materials in commercially available processed foods as well.
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