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BS EN ISO 13304-2:2022:2023 Edition

BS EN ISO 13304-2:2022:2023 Edition

$167.15

Radiological protection. Minimum criteria for electron paramagnetic resonance (EPR) spectroscopy for retrospective dosimetry of ionizing radiation – ex vivo human tooth enamel dosimetry

Published By Publication Date Number of Pages
BSI 2023 34
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The purpose of this document is to provide minimum criteria required for quality assurance and quality control, evaluation of the performance and to facilitate the comparison of measurements related to absorbed dose estimation obtained in different laboratories applying ex vivo X-band EPR spectroscopy with human tooth enamel. This document covers the determination of absorbed dose in tooth enamel (hydroxyapatite). It does not cover the calculation of dose to organs or to the body. This document addresses: a) responsibilities of the customer and laboratory; b) confidentiality and ethical considerations; c) laboratory safety requirements; d) the measurement apparatus; e) preparation of samples; f) measurement of samples and EPR signal evaluation; g) calibration of EPR dose response; h) dose uncertainty and performance test; i) quality assurance and control.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
13 4 Apparatus
4.1 Specifications for EPR spectrometer
4.2 Spectrometer sensitivity
4.3 Microwave bridge
4.4 Magnetic field
14 4.5 Microwave resonator
5 Preparation of tooth enamel samples
5.1 General
15 5.2 Applicable grain size
6 Measurement of the EPR spectrum
6.1 Description of spectrum
16 6.2 Applicable measurement parameters and conditions
6.2.1 General
6.2.2 Microwave power
6.2.3 Magnetic centre field
6.2.4 Magnetic field sweep width
6.2.5 Magnetic field sweep time
17 6.2.6 Time constant of signal channel receiver
6.2.7 EPR spectrum resolution
6.2.8 Conversion time of spectrum acquisition
6.2.9 Magnetic field modulation amplitude
6.2.10 Number of spectrum accumulations
18 6.2.11 Sample positioning and loading
6.2.12 Dependence of EPR signal intensity on sample mass
6.2.13 Use of standard samples
19 6.2.14 Number of measurement repetitions
7 Assessment of the RIS intensity
7.1 General
20 7.2 Intrinsic EPR signals from microwave resonator and sample tube
8 Irradiation of tooth enamel calibration samples for low linear energy transfer (LET) exposure
21 9 Conversion of the RIS intensity into an estimate of absorbed dose
22 10 Calculation of uncertainty on dose estimate
23 11 Minimum detectable dose
24 12 Confidentiality and ethical considerations
13 Laboratory safety requirements
13.1 General
13.2 Magnetic field safety requirements
25 13.3 Electromagnetic frequency requirements
13.4 Chemical safety requirements
13.5 Health risks from tooth samples
13.6 Optical safety requirements
14 Responsibility of the customer
15 Responsibility of the service laboratory
16 Quality assurance and quality control (QA and QC)
16.1 General
26 16.2 Performance checks
16.2.1 General
16.2.2 Performance checks by inter-laboratory comparisons
16.2.3 Performance checks of sample preparation
27 16.2.4 Performance checks of general measurement laboratory conditions
16.2.5 Performance checks of EPR spectrometer
17 Collection/selection and identification of samples
28 18 Transportation and storage of samples
19 Minimum documentation requirements
29 Bibliography

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BS EN ISO 13304-2:2022
$167.15