ATSDR Draft Toxicological Profile for Radon_September 2008.pdf

RADON 1397. ANALYTICAL METHODSTable 7-2. Analytical Methods for Determining Radon and Progeny in Environmental SamplesSamplematrixSoilPreparation methodDry in 55 °C oven for 24 hours;place 5 g in 20 mL borosilicateglass scintillation; cover with10 mL distilled water; allow soilto become wet; add 5 mL highefficiencymineral oil; allow toage 30 daysAnalyticalmethodScintillationcounterSoil None Track etchdetector buried30 cm deepDrinkingWaterWaterWaterDraw an aliquot of unaeratedwater into a syringe and inject ina scintillation vial containing theliquid scintillation cocktailsolutionPass carrier gas throughsamples in a bubbler flask topurge out dissolved radon;transfer radon to evacuatedscintillation cellInject into glass vial containingliquid scintillation solution; shakevigorouslyASTM MethodD5072(Scintillationcounter)ScintillationcounterLiquidscintillationcounterWater Direct measurement Gamma rayspectroscopyTLD = thermoluminescent dosimeterSample Percentdetection limit recovery ReferenceNo data No data Rangarajanand Eapen1987;Wadach andHess 1985No data No data Rangarajanand Eapen19870.04 Bq/L(1.1 pCi/L)1.4 pCi/L(52 Bq/m 3 )10 pCi/L(370 Bq/m 3 )10 pCi/L for 1-Lsample(370 Bq/m 3 )94-96% ASTM 199990 Crawford-Brown andMichel 1987No data Crawford-Brown andMichel 1987No data Yang 1987***DRAFT FOR PUBLIC COMMENT***