Analytical Method for THE SPECTROGRAPHIC DETERMINATION OFnLITHIUM, POTASSIUM, AND BARIUM IN URANIUM ORES AND CONCENTRATES BY THE CARRIER DISTILLATION METHOD

摘要

The ore or concentrate after ignition is diluted with spectrographically pure "U308" and mixed with 7% by weight of sodium chloride carrier. The mixture is placed in a graphite cup which is made the anode for excitation in a d.c. arc at 12 amp. Spectra are recorded photographically using a large spectrograph with either glass or quartz optics. Direct emission from the electrodes is avoided by use of an electrode screen. Spectra are evaluated visually or by micro photometer.