Additional file 1 of A single column separation method for barium isotope analysis of geologic and hydrologic materials with complex matrices

Additional file 1: Table S1. Information on samples used for column calibration experiments. Table S2. Thermo Element® ICP-MS signal intensity (in counts per second) for a column calibration using 2.0 N HCl for the entire elution of a dissolved silicate volcanic rock. Table S3. Thermo Element® ICP-MS signal intensity (in counts per second) for a column calibration using 2.5 N HCl for the entire elution of a dissolved silicate volcanic rock. Table S4. Thermo Element® ICP-MS signal intensities (in counts per second) for a column calibration using 2.5 N HCl for the first 20 mL, and 3.0 N HNO3 for the remaining elution of a produced water sample with 0.5 μg of La and Ce added. Table S5. Thermo Element® ICP-MS signal intensities (in counts per second) for a column calibration using 2.5 N HCl for the first 20 mL, and 2.0 N HNO3 for the remaining elution of dissolved freshwater mussel shell calcium carbonate. Figure S1. Examples of column matrix separation for major elements, Ba, and isobaric interferents La and Ce for a volcanic silicate sample using the BIO-RAD Poly-Prep® gravity flow ion exchange columns described in the manuscript. Figure S2. Examples of column matrix separation of Ba from isobaric interferents La and Ce for a produced water sample (a) and calcium carbonate sample (b) using the BIO-RAD Poly-Prep® gravity flow ion exchange columns described in the manuscript