Uncertainty of measurement in spectrometric analysis: A case study

The methods of spectrometric analysis belong to a group of measurement methods that are used for their simplicity, speed of analysis, and large selectivity to solve various problems of analytes. Accuracy and reliability of any chemical analysis largely depend on the way the analyzed sample is prepared.The objective of this work is to evaluate the uncertainty and metrological reliability of material concentration measurement considering sample preparation and chemical–physical transformation of spectrometric analysis.Metrological properties of spectrophotometric method have been evaluated experimentally and influence of analysis conditions on the measurement result was described.