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A series of alkyl 1,3-diketones were used to study the temperature dependence of the Kovats retention indices in the temperature range 130-190 °C (403-463 K). The temperature dependence is described by the empirical equation / = B + B/T + ClnT. On the basis of this equation, the activation enthalpy, ΔH ≠ , and the chemical potential of the partitioning of one methylene group between the two phases of the chromatographic system, Δμ p ( C H 2 ) , were calculated. Also, the Kovats retention indices - boiling point correlations (linear and reciprocal) for alkyl 1,3-diketones were studied and Δμ p ( C H 2 ) was calculated.

Temperature dependence of the Kovats retention indices for alkyl 1, 3-diketones on a DB-5 capillary column