Unit Size: 100g
Price per Unit: 130 €
Report: IAEA/AL/145
Date of Release: 2006-10-01
Reference-Sheet (pdf-format)
About 350 kg of mixed fish species were collected in the eastern Irish Sea by the Centre for Envi-ronment, Fisheries and Aquaculture Science (CEFAS), Lowestoft, U.K., in 1996. The skin was removed, the fish filleted, freeze-dried and subsequently sent to IAEA-MEL for processing. The sample, which was reduced by freeze-drying to about 69 kg, was then ground to powder, sieved through a 0.5 mm mesh and homogenized by mixing in a nitrogen atmosphere. The sample was freeze-dried once more, ground and sieved at 250 μm to obtain a final amount of 10 kg. The sam-ple was then mixed with 100 kg of North Sea fish powder (fraction below 250 μm). To ensure ho-mogenization of the final sample, both samples were mixed by jet pulverizing in a nitrogen atmos-phere. The samples were then packed into bottles under nitrogen gas, sealed with polyethylene caps and labelled with the code IAEA-414. The bottles containing 100 g of fish powder each were sterilized according to ISO standards [3] at 10 kGy in an irradiation facility.
Reference date for decay correction: 1997-01-01| Analyte | Value | Unit | 95% C.I. | N | R/I/C |
|---|---|---|---|---|---|
| 40K | 481 | Bq/kg | 470 - 486 | 19 | R |
| 90Sr | 0.28 | Bq/kg | 0.10 - 0.54 | 6 | I |
| 137Cs | 5.18 | Bq/kg | 5.12 - 5.22 | 16 | R |
| 210Pb(210Po) | 2.1 | Bq/kg | 1.8 - 2.5 | 11 | I |
| 226Ra | 1.4 | Bq/kg | 0.6 - 1.6 | 9 | I |
| 232Th | 0.028 | Bq/kg | 0.025 - 0.031 | 6 | R |
| 234U | 1.22 | Bq/kg | 1.15 - 1.26 | 8 | R |
| 235U | 0.050 | Bq/kg | 0.045 - 0.055 | 9 | R |
| 238Pu | 0.0230 | Bq/kg | 0.0221 - 0.0250 | 11 | R |
| 238U | 1.11 | Bq/kg | 1.07 - 1.15 | 9 | R |
| 239Pu | 0.066 | Bq/kg | 0.055 - 0.073 | 10 | I |
| 239+240Pu | 0.120 | Bq/kg | 0.116 - 0.123 | 14 | R |
| 240Pu | 0.047 | Bq/kg | 0.046 - 0.051 | 10 | I |
| 241Am | 0.197 | Bq/kg | 0.193 - 0.204 | 9 | R |
| 241Pu | 2.0 | Bq/kg | 1.8 - 2.3 | 11 | I |
(N) Number od accepted laboratory mean which are used to calculate the recommended or information values and their respective confidence intervals
(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)
The values listed above were established on the basis of statistically valid results submitted by laboratories which had participated in an international intercomparison exercise organized by the Marine Environment Laboratories, Agency’s Laboratories, Monaco. The details concerning the criteria for qualification as recommended or information value can be found in the report which is available free of charge upon request. Orders for this material should be sent to AQCS, Seibersdorf.