Spectrochemical Assay for Traces of Tungsten
THE research laboratory of this Company was recently faced with the problem of determining trace amounts of tungsten in a series of classifier sands. A spectrographic survey revealed the feasibility of using this instrument in the final evaluation, but a check of the common methods in use for the isolation of tungsten (3, 4) showed these methods to give incomplete separation for trace amounts. An investigation into the possibility of modifying these procedures, or developing others, was thus indicated.
Acid, Alumina, Aluminas, Aluminum, aluminum, hydrochloric acid, sodium bicarbonate, sodium hydroxide, Standard Tungsten Solution.-Prepare, Filters, Hydrochloric acid, Standards, Tungsten, Water, Waters