Reference Materials for Collaborative Tests of Air Quality Methods (Classic Reprint)

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Excerpt from Reference Materials for Collaborative Tests of Air Quality MethodsAnalysis of the atmosphere for ambient-level contaminants demands meticulous care in the handling of the sample. Gaseous contaminants such as the Oxides Of nitrogen and sulfur are typically encountered at concentrations of 10-100 parts per billion, at these concentrations they are prone to adsorption or condensation within the sampling equipment and reaction with its materials of construction. Similarly, particulate contaminants are subject to sampling losses and physical alteration within the sample collection train. Furthermore.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.