Validation of the gold determination method by fire assay combined with atomic absorption spectrometry in geological, mine and metallurgical samples
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Abstract
This investigation describes the process of validation of the method for the determination of gold by fire assay combined with atomic absorption spectrophotometry in sediments, rocks, concentrates and tailings, with the objective of providing reliable results. In the study, the validation parameters were established, which are limit of detection (LOD), limit of quantification (LOQ), working interval, linearity, selectivity and specificity, repeatability and intermediate precision, veracity and uncertainty, and their criteria of compliance. By means of statistical analysis of the experimental results and together with the acceptance and rejection criteria, the validation parameters were evaluated. Finally, the method implemented by the IIGE chemical laboratory for the determination of gold is declared validated in sediment, rock, concentrate and tailings samples.
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