Microwave digestion-spectrophotometric method for determination of iron content in metallic tantalum
In this study,the determination of iron content in metallic tantalum was achieved using microwave digestion-spectrophotometry method.The experiment investigated sample treatment methods,microwave digestion solvents,and digestion temperatures.The results showed that the best effect for digesting metallic tantalum was achieved at 200℃using hydrofluoric acid,nitric acid,and water as solvents.To prevent interference from fluoride and other impurity elements,the experiment optimized the amounts of hydrofluoric acid and tartaric acid-boric acid solution,with optimal amounts being 2 mL and 30 mL,respectively.Furthermore,the recovery rate of microwave digestion was calculated,ranging from 97.80%to 98.43%,indicating low sample loss and microwave digestion being more suitable as a pretreatment method for metallic tantalum.Additionally,the repeatability of iron content in metallic tantalum was tested,showing that this method has good repeatability with a relative standard deviation(RSD)of 3.89%.
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