A carbon-14 beta-ray standard, benzoic acid-7-C-14 in toluene, for liquid scintillation counters

Abstract

A carboll-14 beta-ray stand ard for use in liquid scintill ation coun tin g has been prep ared and stand ardized . The sample co ns ist s of benzoic aeid-7-C14 dissolved in t olu ene. Samples of th e sol ution were oxidi zed qua nt itatively in a P aar oxygen bomb, a nd the radi oactivity of t he carbon diox ide was co mpar ed wi th t he r adioactivi ty of carbon diox id e prepa red q uan titat ively from t he Bureau's sodium carb on ate-C14 stand a rd .