The Radiochemistry of Radium

acetic actinium aliquot alkaline alpha activity alpha count ammonium hydroxide approximately aqueous phase barium and radium barium carrier barium chloride barium sulfate barium-radium beaker bismuth bromide centrifuge tube chromate column complete concentrated nitric acid containing cool coprecipitated counting rate counts per minute crucible crystals daughters decay products Determination of Radium dilute discard the supernate distilled water Dowex EDTA elution extraction filter paper filtrate five minutes flask fractional grams HNO3 hot plate hydrochloric acid hydrogen ignition ingrowth insoluble ions isotopes lanthanum lead milliliters mixture muffle furnace NH4OH nitric acid phosphate phosphor planchet platinum prepared Procedure quartz dish radium and barium Radium bromide radium chloride radium isotopes radium nitrate radon Reagents removed residue resin Rinse sample separation of radium slurry sodium carbonate soluble standard stirring stopcock sulfide sulfuric acid temperature Th₁ thorium uranium urine vial volume wash zinc sulfide