Product tags

​The IAEA-375 material (top soil to a depth of 20 cm) was obtained from the “Staryi Viskov” collective farm in Novozybkov, Brjansk, Russia, in July 1990. The material was air dried and milled to give a grain size less than 0.3 mm by the Brjansk Centre for Agricultural Radiology and Chemistry and dispatched for further processing to the IAEA Laboratories, Seibersdorf, in November 1990. This material was γ-sterilized to ensure long-term stability of the material by inhibiting microbial action.

Reference date for decay correction: 1991-12-31

AnalyteValueUnit96% C.I.NR/I/C
106Ru56Bq/kg53 – 5826R
125Sb77Bq/kg74 – 7938R
129I0.0017Bq/kg0.0013 – 0.002110R
134Cs463Bq/kg454 – 47287R
137Cs5280Bq/kg5200 – 536091R
226Ra20Bq/kg18 – 2237R
228Th21Bq/kg17 – 256I
232Th20.5Bq/kg19.2 – 21.911R
234U25Bq/kg17 – 325I
238Pu0.071Bq/kg0.056 – 0.08510I
238U24.4Bq/kg19.0 – 29.87I
239+240Pu0.3Bq/kg0.26 – 0.3420I
241Am0.13Bq/kg0.11 – 0.156I
40K424Bq/kg417 – 43284R
90Sr108Bq/kg101 – 11443R
As2.56mg/kg2.24 – 2.886I
Ba335mg/kg316 – 3546I
La17.6mg/kg15.3 – 19.95I
Ni9.7mg/kg7.9 – 11.65I
Rb48mg/kg44 – 528I
Th5.2mg/kg5.0 – 5.426R
U1.86mg/kg1.66 – 2.0530R
Yb1.73mg/kg1.24 – 2.225I

(Value) Concentration calculated as a mean of the accepted laboratory means 
(N) Number of accepted laboratory means 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 one or more international interlaboratory comparisons organized by the Chemistry Unit, IAEA Laboratories, Seibersdorf. The details concerning the criteria for qualification as a recommended or information value can be found in the respective report (attached).