NF M60-806-2:2005 Nuclear energy - Measurement of radioactivity in the environment - Water - Part 2 : measurement of strontium 90 activity in water - organic solvent extraction of yttrium 90 and measurement of beta activity.
2012NF M60-806:2012 Water quality - Strontium 90 and strontium 89 - Test methods using liquid scintillation counting or proportional counting.
2005NF M60-806-2:2005 Nuclear energy - Measurement of radioactivity in the environment - Water - Part 2 : measurement of strontium 90 activity in water - organic solvent extraction of yttrium 90 and measurement of beta activity.