Reference number
ISO 11665-9:2019
© ISO 2025
International Standard
ISO 11665-9:2019
Measurement of radioactivity in the environment — Air: Radon-222 — Part 9: Test methods for exhalation rate of building materials
Edition 2
2019-05
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Published (Edition 2, 2019)

ISO 11665-9:2019

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Format
CHF 177
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Abstract

This document specifies a method for the determination of the free radon exhalation rate of a batch of mineral based building materials. This document only refers to 222Rn exhalation determination using two test methods: liquid Scintillation Counting (LSC) and gamma ray spectrometry (see Annex A and Annex B).

The exhalation of thoron (220Rn) does not affect the test result when applying the determination methods described in this document.

General information

  • Status
     : Published
    Publication date
     : 2019-05
    Stage
    : International Standard to be revised [90.92]
  • Edition
     : 2
    Number of pages
     : 39
  • Technical Committee :
    ISO/TC 85/SC 2
    ICS :
    17.240  13.040.01 
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