IAEA-451

€150.00
Producing Laboratory: MESL
Vendor: IAEA
Availability: In stock
Freeze dried biota (clam, Gafrarium trumidum)

Origin and preparation of the material

60 kg of Tumid Venus clams (Gafrarium tumidum) were collected in Noumea, New Caledonia. The organisms were dissected and the soft tissues were deep-frozen, freeze dried, ground into powder and sieved through a 250 μm stainless steel sieve.

The sieved biota fraction with a particle size of less than 250 μm was homogenized by mixing it in a stainless steel rotating homogenizer for three weeks. Then, aliquots of about 20 g were packaged in amber glass bottles with aluminum screw caps, labeled IAEA-451 and sealed with Teflon tape.

Recommended mass fractions values
Chlorinated pesticides
(based on dry mass)

AnalyteUnitRecommended value(a)Expanded uncertainty(b)
HCBµg kg-10.130.04
pp' DDEµg kg-10.740.17
pp' DDDµg kg-10.630.14
Dieldrinµg kg-11.890.55
Trans- Chlordaneµg kg-10.330.07

(a) Recommended values are calculated from the accepted data sets, each set being obtained by a different laboratory and/or a different method of determination following ISO Guide 35 [1].

(b) The uncertainty is expressed as an expanded uncertainty with a coverage factor k = 2 estimated in accordance with ISO Guide 35 [1].

Recommended mass fractions values
PCB congeners
(Based on dry mass)

AnalyteUnitRecommended value(a)Expanded uncertainty(b)
PCB 28µg kg-10.430.07
PCB 52µg kg-10.570.16
PCB 95µg kg-10.660.17
PCB 101µg kg-11.690.33
PCB 110µg kg-10.730.16
PCB 118µg kg-10.940.18
PCB 128µg kg-10.460.11
PCB 138µg kg-15.41.1
PCB 149µg kg-13.180.77
PCB 153µg kg-110.92.0
PCB 156µg kg-10.470.15
PCB 170µg kg-13.320.81
PCB 180µg kg-17.11.3
PCB 183µg kg-11.630.39
PCB 187µg kg-14.080.76
PCB 194µg kg-11.610.34

(a) Recommended values are calculated from the accepted data sets, each set being obtained by a different laboratory and/or a different method of determination following ISO Guide 35 [1].

(b) The uncertainty is expressed as an expanded uncertainty with a coverage factor k = 2 estimated in accordance with ISO Guide 35 [1].

 

Recommended mass fractions values
PBDE congeners
(based on dry mass)

AnalyteUnitRecommended value(a)Expanded uncertainty(b)
BDE 99µg kg-10.490.13

(a) Recommended values are calculated from the accepted data sets, each set being obtained by a different laboratory and/or a different method of determination following ISO Guide 35 [1].

(b) The uncertainty is expressed as an expanded uncertainty with a coverage factor k = 2 estimated in accordance with ISO Guide 35 [1].

Recommended mass fraction values
Polycyclic Aromatic Hydrocarbons
(Based on dry mass)

AnalyteUnitRecommended value(a)Expanded uncertainty(b)
Phenanthreneµg kg-118.84.8
Fluorantheneµg kg-152.29.4
Pyreneµg kg-140.37.2
Chryseneµg kg-130.05.6
Benzo[a] Anthraceneµg kg-118.33.2
Benzo[b] Fluorantheneµg kg-134.66.9
Benzo[k] Fluorantheneµg kg-117.45.5
Benzo[e] Pyreneµg kg-123.76.3
Benzo[a] Pyreneµg kg-118.84.1
Benzo[g,h,i] Peryleneµg kg-119.74.3
Indeno[1,2,3-cd] Pyreneµg kg-124.06.1
Dibenz[a,h] Anthraceneµg kg-15.01.5

(a) Recommended values are calculated from the accepted data sets, each set being obtained by a different laboratory and/or a different method of determination following ISO Guide 35 [1].

(b) The uncertainty is expressed as an expanded uncertainty with a coverage factor k = 2 estimated in accordance with ISO Guide 35 [1].

Information values for mass fractions of PCB Congeners, Chlorinated pesticides, PBDE congeners and PAHs
please consult Reference sheet (attached)
Please note that information values are not to be used for any assessment of analytical performance or similar; they are included to provide information about the expected mass fractions/concentration levels

The values li​​​sted above were established on the basis of statistically valid results submitted by laboratories which had participated in an international interlaboratory comparison organized by the IAEA Marine Environment Laboratory, Monaco. The details concerning the criteria for qualification as a recommended or information value can be found in the respective report (attached).

References 

[1] INTERNATIONAL ORGANIZATION FOR STANDARDIZATION, Reference materials — Guidance for characterization and assessment of homogeneity and stability, ISO Guide 35:2017, ISO, Geneva (2017)