Differences in analytical sensitivity, precision, and accuracy exist among techniques and laboratories involved in the chemical analysis of archaeological ceramics. Large differences in these analytical parameters become significant in the formulation of data bases where comparability of the data is being sought. Small differences become significant when comparing pottery produced from clay resources located within a discrete geological environment. To better assess and report on the analytical results being obtained from laboratories, neutron-activation analysis and X-ray fluorescence are discussed relative to the level of precision required for ceramic characterization studies, the use of standards, and the preparation and submission of samples for commercial laboratory analysis.
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