Atomic Absorption Methods Of Analysis Useful In Geochemical Exploration PDF Download

Excerpt from Atomic-Absorption Methods of Analysis Useful in Geochemical Exploration Atomic-absorption methods for determining 15 elements in soils and rocks are described in sufficient detail for use by nontechnical persons. These elements are silver, bismuth, cadmium, copper, lead, zinc, cobalt, nickel, calcium, lithium, sodium, potassium, gold (three methods), tellurium, and mercury. A few of these methods are modified from published procedures for use on geologic mate rials other than natural waters; the remaining ones have been developed in the us. Geological Survey laboratories. Insofar as possible, sample dissolution is accomplished by digestion with hot nitric acid, but in certain samples, for example gold and tellurium, dissolution is accomplished by different combinations of hydrobromic acid and bromine, and in other samples, for example alkalis and calcium, dissolution is accomplished by perchloric, nitric, and hydrofluoric acid mixtures. Sample dissolution for the mercury determination is replaced by the application of heat to evolve the element or decompose its compounds. The methods differ in the judicious use of solvent extraction to separate the elements from possible interferences, to achieve a relatively uniform matrix, and to enrich the element above a threshold concentration amenable to atomic-absorption measurement. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.