δ142Ce minus δ146Nd value as a redox indicator in Earth's surface environments

High-precision stable isotope measurements of tungsten and molybdenum in single sample aliquots combined with optimized separation for mixed double spikes

“…The combined use of multi-element isotopes undoubtedly has advantages to constrain natural processes because the individual isotopes could add different information on the same targets depending on their own chemistry. 46–51 However, in many cases, this could lead to the loss of precious samples and increased effort because individual elements must be purified via different chemical procedures to avoid matrix effects in the measurements. In particular, W and Mo are both soluble oxyanions in oxic aqueous phases, and their abundances are generally low in rocks and sediments.…”