IAEA Reference Materials
Reference
Sheets
IAEA-A-12
RADIONUCLIDES IN ANIMAL BONE
Intended
Use
This
sample is intended to be used as a reference material for the measurement of radionuclides in animal bone. It can also be used as a quality
control material for the assessment of a laboratory's analytical work, for the validation
of analytical methods and for quality assurance within a laboratory.
Origin
and preparation of the material
The
animal bone material was obtained from a commercial supplier. The material
had been defatted, dried, sterilized and crushed to give a particle size below
125 µm.
A bulk sample of approximately 50
kg of animal bone powder was received by the Agency's Laboratories at Seibersdorf
and was further homogenized by mixing in a rotating plastic drum for 70 hours.
The material was dispensed into plastic bottles in 80 g units without any
further processing. Subsequently, the samples were irradiated to a dose of
2.5 x 104 Gy using a 60Co source to ensure long-term
stability of the material by inhibiting microbial action.
Date of Release:
January 1983
|
Unit Price:
90 €
|
Unit Size:
80 g
|
| Producer:
Chemistry Unit Agency's Laboratories, Seibersdorf A-2444 Seibersdorf, Austria |
Supplier:
Analytical Quality Control Services Agency's Laboratories, Seibersdorf A-2444 Seibersdorf, Austria |
|
Reference Sheet:  IAEA-A-12(.pdf) |
||
Reference
Date for decay correction: 15th December 1981 |
||||
| |
|
|
|
|
| |
|
|
|
|
| |
|
|
|
|
| * |
Number of accepted laboratory results which were used to calculate the
recommended values and their respective confidence intervals about the
median value. |
| (R/I) | Classification
assigned to the property value for Analyte (Recommended/Information) |
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 during 1981. The details concerning the criteria for qualification
as a recommended value can be found in the report (IAEA/RL/96) "Report
on the Intercomparison Run A-12: Radionuclides in Animal Bone" [1]. This
report is available free of charge upon request.
Homogeneity
The between and within bottle homogeneity of the material was assessed
by determining the elemental strontium concentration in 200 mg sub-samples using flame
atomic absorption spectrometry. The results were subjected to F and T tests and it was
concluded that the material could be considered to be homogeneous for a sample size
greater than or equal to 200 mg.
Dry
weight determination
All
recommended values are expressed on a dry weight basis. Therefore the dry
weight must be determined at the time of analysis, using separate sub-samples
of at least 500 mg dried to constant weight in a drying oven set to 105 °C.
Subsequent weighings should differ by less than 5 mg.
Instructions
for use
The
recommended sample size for analysis is 200 mg. Analysts are reminded to take
appropriate precautions in order to avoid contamination of the material during
handling. No special precautions are required for the storage of this material.
References:
| [1] |
Last updated 30 March 2004
