Resolution of SmCo feed concentration and analytical-floor ambiguities

Determine whether the SmCo feed concentration of 3928.381 mg/L applies to both experimental rounds, establish how nominal yields exceeding 100% should be treated, and determine whether the repeated cobalt value of $4.8983050847\times10^{-10}$ mol represents an analytical detection floor.

Background

The SmCo analysis derives nominal recovery using an assumed initial samarium concentration and identifies a purity–nominal-yield frontier. Several recorded conditions exceed 100% nominal yield, and one cobalt value is repeated at an extremely small magnitude.

The interpretation of the SmCo results remains dependent on unresolved experimental and analytical provenance. Resolving these issues is necessary to determine whether the reported nominal yields and cobalt measurements support the stated process-choice comparisons.

References

For SmCo, interpreting nominal yield requires confirming whether the 3928.381~mg/L feed concentration applies to both rounds and how nominal yields above 100\% should be treated. Interpreting the repeated Co value $4.8983050847\times10{-10}$~mol requires confirming whether it is an analytical floor.

— Decision-Focused Active Learning for Scale-Aware Critical-Materials Recovery  (2609.09413 - Srinivas et al., 8 Sep 2026) in Section 7, “Related work, limitations, and open questions”