Astm D 5072 – 98 pdf free download

Standard Test Method for
Radon in Drinking Water1

This standard is issued under the fixed designation D 5072; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method covers the measurement of radon in
drinking water in concentrations above 0.04 Bq/L.

1.2 This test method may be used for absolute measurements by calibrating with a radium-226 standard or for relative
measurements by comparing the measurements made with
each other.

1.3 This standard does not purport to address the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:
D 1129 Terminology Relating to Water2
D 1193 Specification for Reagent Water2
D 2777 Practice for Determination of Precision and Bias of
Applicable Test Methods of Committee D-19 on Water2
D 3370 Practices for Sampling Water from Closed Conduits2

3. Terminology

3.1 Definitions—For definitions of terms used in this test
method, refer to Terminology D 1129 and to other published
glossaries.

4. Summary of Test Method

4.1 This test method is based on the scintillation counting of
radon-222 and its daughters, a gaseous daughter product of
radium-226.

4.2 An aliquot of unaerated water is drawn into a syringe
and then gently injected beneath 10 mL of liquid scintillation mix
that does not contain an emulsifier. The vials are capped,