The Use of Dithizone Extraction and Atomic Absorption Spectrometry for the Determination of Silver and Bismuth in Rocks and Sediments, and of a Demountable Hollow Cathode Lamp for the Determination of Bismuth and Indium

摘要

A method involving dithizone extraction and atomic absorption spectrometry is presented for the determination of silver and bismuth in rocks and sediments. Flame atomization is used for silver, but graphite furnace atomization for bismuth. A demountable hollow cathode lamp with exchangeable hollow cathodes was used in the bismuth determination, and also for indium measurements. Bismuth and silver have been determined in three Usgs rock reference samples and satisfactory agreement with listed data found. Data on silver concentrations in sediments from various locations are presented.