Total Anthropogenic Suspended Particulate as Derived from Chemical Analysis of Chloride and Silicate on High-Volume Samples

Comparison of Three Methods for Measuring Suspended-Particulate Concentrations

“…The silicon component, important to the identification of nonanthropogenic sources, cannot even be considered; and the presence of variable amounts of metallic impurities in the glass fiber (3) poses a potentially severe interference problem. To avoid these problems, other types of filter material such as cellulose have been used with hi-vols (4). Despite these problems and the need to consider new and more appropriate suspended-particulate measures, use of the traditional hi-vol will probably continue, to provide data continuity for this widely recognized and long-used method.…”

“…Humic substances are stable polymers believed to be formed as byproducts of microbial degradation of plants and can occur in natural waters through leaching from soils (2). In recent t A preliminary report of this work was presented at the 33rd Northwest Regional Meeting of the American Chemical Society, Seattle, WA, June 14,1978. years, studies have shown that dissolved organic matter can play an important role in the ability of natural waters to complex metals, thus affecting trace-metal transport and toxicity (3)(4)(5)(6)(7). Highly colored streams draining marshes or swamps contain unusually high concentrations of DOM and are thus often the most advantageous natural systems for studying the role of DOM in the transport of trace metals and other pollutants.…”

Sulfate and Nitrate Particulates as Related to SO2and NOXGases and Emissions

“…1 The use of cellulose allows a medium containing zero backgrounds of these cations as well as a neutral surface, eliminating any possible gaseous SO2 conversion to apparent "particulate sulfate." The sulfate analysis was performed by the classical barium sulfate turbidimetric procedure.…”

“…The use of cellulose rather than glass filters enables a determination of the important silicate component of TSP so that a successful mass balance became possible. As described in a previous paper, 1 the silicate and chloride constituents were determined, and a first approximation to a total anthropogenic suspended particulate (TASP) value was then derived by excluding these components from the original TSP value. These TASP values showed a geographic distribution in much closer conformity to visibility reduction and citizen complaint than did the TSP values.…”