Elemental precision and accuracy

Article Abstract:

The development of a pilot Performance Evaluation sample program to study the preparation of solid performance evaluation samples and the accuracy and precision of hazardous materials laboratories are discussed. The study involved sample preparation, sample and preparation procedure validation and distribution of these samples to accredited laboratories to test their performance. The utility of the evaluation of was demonstrated.

Methods, Hazardous substances, Hazardous substances risk assessment

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Precision and accuracy of polychlorinated biphenyls

Article Abstract:

The development of a pilot proficiency evaluation sample program for the analysis of polychlorinated biphenyls (PCBs) is discussed. Twenty governmental laboratories acted as reference laboratories for a set of five spiked soil performance evaluation samples. These same soils were analyzed by 153 accredited laboratories. The nonnormal distribution results indicate widespread and systematic errors in the analysis of PCBs.

Analysis, Usage, Polychlorinated biphenyls, Soils, Soil analysis

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Off-site forensic determination of airborne elemental emissions by multi-media analysis: a case study at two secondary lead smelters

Article Abstract:

The presence and sources of airborne elemental emissions at two secondary lead smelters were examined to evaluate the applications of multi-element multi-media analysis. Analysis of solids, soils, wipes and glass fiber filters found in smelter vicinity showed lead: antimony: arsenic ratios in tested media. Air transportation emerged as the primary factor in the presence of toxic concentrations in the smelters.

Environmental aspects, Air pollution, Smelting furnaces

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