An International Collaborative Blind Trial on Electron Spin Resonance (ESR) Identification of Irradiated Crustacea

✍ Scribed by Stewart, Eileen M; Kilpatrick, David J

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 405 KB
• Volume: 74
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199708)74:4<473::aid-jsfa819>3.0.co;2-k

✦ Synopsis

The results of an interlaboratory collaborative trial are presented where 15 participating laboratories used the technique of ESR spectroscopy to detect three species of Crustacea irradiated in the frozen state and stored at [20¡C. Samples of Norway lobster (Nephrops norvegicus), pink shrimp (Pandalus montagui) and crevettes (Penaeus (Penaeus) semisulcatus) were irradiated at dose levels of approximately 1, 3 and 5 kGy or left unirradiated. Each laboratory analysed nine samples of each species approximately 2 weeks following irradiation and the same number after storage for 2 months at [20¡C. In total, 270 samples were analysed for each of the three species of Crustacea. A 95% correct identiÐcation rate was achieved for the crevette samples where 256 of the 270 samples examined were correctly identiÐed. Two-hundred and twentysix Norway lobster samples were correctly identiÐed, giving a correct identiÐcation rate of 84%. The most disappointing results were associated with pink shrimp, where only 54% of the samples were correctly identiÐed. Storage at [20¡C was not found to have a signiÐcant e †ect on detection of the irradiated samples.