The isotopic analysis of actinides from complex matrixes such as environmental samples entails bringing the actinides into solution, separating them from the sample matrix, separating actinide elements from one another, and concentrating them for presentation as a source to a detector. We have developed a sequence of automated methods to both accelerate the processes of radiochemical sample preparation, and to reduce the labor using automation. Matrix separations may be performed using column-based extraction chromatography methods rather than classical precipitation methods.  Actinides are separated by anion exchange, also a column-based method.  We have developed an automated workstation for column-based separations to process several samples in parallel, reducing labor and operator attention compared to gravity feed or vacuum box approaches.  It has been designed with rigorous prevention of cross contamination.  Examples and performance data using radiometric methods and mass spectrometry will be described for plutonium isotope determinations.

Automation of column-based radiochemical separations for actinide analysis

245th National Meeting (2013)

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