BS ISO 19361:2017 ✓ Most Recent

BS ISO 19361:2017 applies to liquid scintillation counters and requires the preparation of a scintillation source obtained by mixing the test sample and a scintillation cocktail. The test sample can be liquid (aqueous or organic), or solid (particles or filter or planchet).

This document describes the conditions for measuring the activity of beta emitter radionuclides by liquid scintillation counting.

The choice of the test method using liquid scintillation counting involves the consideration of the potential presence of other beta emitter radionuclides in the test sample. In this case, a specific sample treatment by separation or extraction is implemented to isolate the radionuclide of interest in order to avoid any interference with other beta-, alpha- and gamma-emitting radionuclides during the counting phase.

This document is applicable to all types of liquid samples having an activity concentration ranging from a few Bq?l-1 to 106 Bq?l-1. For a liquid test sample, it is possible to dilute liquid test samples in order to obtain a solution having an activity compatible with the measuring instrument. For solid samples, the activity of the prepared scintillation source shall be compatible with the measuring instrument.

The measurement range is related to the test method used: nature of test portion, preparation of the scintillator - test portion mixture, measuring assembly as well as to the presence of the co-existing activities due to interfering radionuclides.

Test portion preparations (such as distillation for 3H measurement, or benzene synthesis for 14C measurement, etc.) are outside the scope of this document and are described in specific test methods using liquid scintillation.

Cross References:
ISO/IEC 17025:2005
ISO 5667-1:2006 Ed 2 (R10)
ISO 5667-3:2012 ED4
ISO 18589-2:2015 ED2
ISO 11929:2010 Ed 1
ISO/IEC GUIDE 98-3:2008 Ed 1
ISO 80000-10:2009 Ed 1
ISO 7870-2:2013
ISO 9698:2010 Ed 2
ISO 11704:2010 Ed 1
ISO 13168:2015
ISO 13162:2011 Ed 1
ISO 13164-4:2015
ISO 13165-1:2013 ED1
ISO/IEC Guide 99:2007
ISO 18589-5:2009 Ed 1


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