Sensitive Determination of Germanium by Atomic-Absorption Spectrophotometry Using Electrothermal Atomization

摘要

Experimental work leading to the development of a method for the determination of low levels of germanium in zinc slag and related compounds is described. The sample is dissolved in a mixture of mineral acids, and the germanium is extracted from 9M hydrochloric acid into carbon tetrachloride, and then back-extracted into water. The germanium is determined in the solution, after acidification with a dilute solution of nitric acid, by atomic absorption spectrophometry using electrothermal atomization (ETA-AAS). The relative standard deviation, sr, for the measurement step was 0,039 at a germanium concentration of 10 microgram/l. The working range was 4 to 50 microgram/l.