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Multiple Digestions Are Sometimes Necessary

Abstract
Accurate data in trace metals analysis is essential for chemists and engineers to make critical decisions. Sample preparation plays a huge role since the analytical data can be no better than the prepared sample. Different acid combinations combined with multiple digestion methods are sometimes necessary to complete the analysis. A clear digest has always been the end goal in elemental analysis. The belief was that a clear digest meant that your elements of interest were in solution. With the wrong acid combination even though your sample is a clear digest, the element of interest will be biased low. This application note will provide examples of situations where the sample preparation influenced the final result.