简介：~~

简介：Thispaperreportsthedevelopmentandvalidationofanassayforthedeterminationofacetonitrileintherecycledmobilephaseusinghighperformanceliquidchromatography(HPLC).Themethodisbasedonthattheretentioninreversed-phaseliquidchromatographyincreaseswithdecreasingconcentrationoforganicphaseinthemobilephase.Thenaturallogarithmofthecapacityratioforagivensoluteislinearlyrelatedtothevolumefractionoftheorganicmodifierinthemobilephase.Fordimethylphthalateanddiethylphthalate,thelinearityrangeis30%―60%,andforbiphenylandterphenyl,therangeis60%―95%.Precisionvalues(RSD)wereboth<1%andtheaccuracy(RE)wasintherangeof±1%.Theassaywassuccessfullyappliedtothedeterminationofacetonitrileconcentrationofrecycledmobilephaseafterthedistillationofthecolumneluentinourlaboratory.

简介：Excessmolarvolume(VE)dataonbinaryliquidmixturesofmethylheptenone(MHO)withmethanol,ethanol,n-propanolorn-butanolhavebeendeterminedfromthedensitymeasurementsat298.15Kandatmosphericpressure.ThevaluesofVEinallthesystemsovertheentirecompositionrangearequantifiedbytheRedlich-Kisterequation.TheeffectsofthechainlengthofalkanolsonVEarediscussed.