## preconcentration coefficient

of a desired microcomponent, in trace analysis
https://doi.org/10.1351/goldbook.P04804
This is defined as $K = \frac{Q_{\text{T}}/Q_{\text{M}}}{Q_{\text{T}}^{\text{o}}/Q_{\text{M}}^{\text{o}}}$ where $$Q_{\text{T}}$$ and $$Q_{\text{T}}^{\text{o}}$$ are the quantities of the microcomponent in the concentrate and in the sample, respectively (mass units or concentration units), and $$Q_{\text{M}}^{\text{o}}$$ and $$Q_{\text{M}}$$ and are the quantities of the matrix before and after @P04803@, respectively. If the @R05206@ is 100%, $$K=\frac{Q_{\text{M}}^{\text{o}}}{Q_{\text{M}}}$$. The terms enrichment @C01124@ and enrichment factor are not recommended.
Source:
PAC, 1979, 51, 1195. (Separation and Preconcentration of Trace Substances. I-Preconcentration for Inorganic Trace Analysis) on page 1198 [Terms] [Paper]