The determination of the pKa's of several organic acids and bases
using chromatography was investigated. Normal-phase buffer-impregnated
paper chromatography was found to be unsuitable. TLC plates impregnated
with mineral oil were examined as a possible reversed-phase method,
with poor results. The use of XAD-2 copolymer as the stationary phase
in...
A low-energy, low-exposure-rate, guarded-field ionization
chamber system with a sensitive volume of approximately 1040 cm³ and an exposure-rate range from 60 mR/h to less than 0.5 mR/h
was designed, constructed and calibrated. The calibration was
effected by constructing and calibrating a 60 cm³ volume transfer
chamber of similar design against...