The correlation between molecular structure parameters of O-ethyl N-isopropyl phosphoro(thioureido)t

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A retention prediction system(RPS)of seven O-ethyl N-isopropyl phosphoro(thioureido)-thioates in reversed phase HPLC was investigated.The system is based on the solvent selectivitytriangle concept.Three molecular structure parameters(hydrophobicity Ⅱ,substituent length L,and substituent maximum width B_5)were used to describe the quantitative structure-retention relation-ships.With these quantitative relationships,the retention behaviours of other eight homologsfor different mobile phase composition were predicted.The predicted values were consistent with themeasured values within relative error of 10%,which means that it is possible to apply the reportedmethod to predict retention values for qualitative purposes for different mobile phase compositions. A retention prediction system (RPS) of seven O-ethyl N-isopropyl phosphoro (thioureido) -thioates in reversed phase was was. The system is based on the solvent selectivity triangle concept. Three molecular structures parameters (hydrophobicity II, and compound maximum width B_5) were used to describe the quantitative structure-retention relation-ships.With these quantitative relationships, the retention behaviors of other eight homologs for different mobile phase composition were predicted. predicted value were consistent with themeasured values ​​within relative error of 10%, which means that it is possible to apply the reported method to predict retention values ​​for qualitative purposes for different mobile phase compositions.
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