effective theoretical plate number

of a chromatographic column
https://doi.org/10.1351/goldbook.E01898
A number indicative of column performance when resolution is taken into account: $N=\frac{16\ R_{\text{s}}^{2}}{(1- \alpha )^{2}}$ where $$R_{\text{s}}$$ is the @P04465@ and $$\alpha$$ is the @S05614@.