IAEA-452 , Biota, Scallop (Pecten maximus)

Organic , Scallop

A sample of 200 kg of Scallop (Pecten maximus) was collected in December 2007 and January 2008 by scuba diving in the “Pertuis Breton”, Western France. The organisms were dissected and soft tissues (the gills, mantle and digestive glands) lyophilized. The freeze dried matter was milled to a powder in a grinder and then sieved through a 250 μm sieve. The sieved material with a particle size of less than 250 µm was further homogenized. Homogeneity was achieved by mixing the material in a stainless steel rotating homogenizer for 14 days in a clean atmosphere at a temperature of 20 (+/-2)°C and relative humidity of 50%. After checking for the homogeneity of sample material, aliquots of about 8 g were packed into pre-cleaned brown borosilicate glass bottles and then sealed in plastic bags. The sample material was labelled IAEA-452.

Certified value1
[mg kg-1]
Expanded uncertainty2
[mg kg-1]
As 17.9 1.1
Cd 30.5 1.6
Cr 5.2  0.7
Cu 11.0 0.8
Fe 1068 47.0
Hg 0.16 0.02
Mn 279 14.0
Pb  2.4 0.3
Zn 167 10.0
MeHg 0.022 0.004

1) Median of the accepted data sets, each set being obtained by a different laboratory and/or a different method of determination.
2) Estimated expanded uncertainty with a coverage factor k=2, corresponding to a level of confidence of approximately 95%, as defined in the JCGM100:2008 Evaluation of measurement data - Guide to the expression of uncertainty in measurement.
The assigned values were established on the basis of statistically valid results submitted by laboratories which had participated in a characterization study organized by the IAEA Environment Laboratories, Monaco.
The details concerning all reported results as well as the criteria for qualification as a certified value may be found in the respective report (attached).

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