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A partition coefficient does not need to be determined with standard additions because it is a property that describes the distribution of a compound between two immiscible phases, typically a solvent and a solid or another solvent. This ratio is determined through experiments that measure concentrations in both phases at equilibrium, rather than through the addition of known standards. Standard additions are primarily used for quantifying analytes in complex matrices rather than for characterizing inherent properties like partition coefficients. Therefore, the determination relies on equilibrium measurements rather than calibration techniques.

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1mo ago

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