Quantification method of trace elements in gallium phosphide in

摘要

PURPOSE:To enable easy quantitative determination with high analyzing sensitivity by adding a hydrofluoric acid into an atomization furnace to adjust the ashing temp. of a soln. to be analyzed in said furnace to the temp. at which the matrix G is selectively evaporated away in the form of low boiling point fluoride from the inside of the furnace. CONSTITUTION:The drying and ashing operations are carried out at least once by introducing the soln. to be analyzed prepd. by dissolving gallium phosphide in mixed acids contg. a hydrochloric acid and nitric acid into the atomization furnace usually at about 20mul introducing rate and further, introducing about 40mul hydrofluoric acid into the furnace; thereafter, the atomization furnace is usually cooled down to an ordinary temp. and the introduction of the soln. to be analyzed and the hydrofluoric acid and the drying and ashing operations are repeated again at least once. The operation of atomization is then carried out and the background correction is made by a deuterium lamp method or Zeeman modulation method. The elements to be analyzed are quantitatively determined by measuring the absorption intensities at the specific wavelengths of the elements to be analyzed; for example, 357.0nm for chromium, 248.3nm, for iron, 279.5nm for manganese, 285.2nm for magnesium, and 342.7nm for copper.