Article (Scientific journals)
Retention prediction of low molecular weight anions in ion chromatography based on quantitative structure-retention relationships applied to the linear solvent strength model
Park, S. H.; Haddad, P. R.; Talebi, M. et al.
2017In Journal of Chromatography. A, 1486, p. 68-75
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Keywords :
Evolutionary algorithm; Ion chromatography; Linear solvent strength model; Multiple linear regression; Quantitative structure-retention relationships; Chemical analysis; Evolutionary algorithms; Forecasting; Integrated circuits; Ions; Linear regression; Regression analysis; Solvents; Structure (composition); Am1 semi-empirical methods; Linear solvent strengths; Low molecular weight; Molecular descriptors; Multiple linear regressions; Predictive performance; Quantitative structure-retention relationship; Regression parameters; Chromatography
Abstract :
[en] Quantitative Structure-Retention Relationships (QSRRs) represent a popular technique to predict the retention times of analytes, based on molecular descriptors encoding the chemical structures of the analytes. The linear solvent strength (LSS) model relating the retention factor, k to the eluent concentration (log k = a − blog [eluent]), is a well-known and accurate retention model in ion chromatography (IC). In this work, QSRRs for inorganic and small organic anions were used to predict the regression parameters a and b in the LSS model (and hence retention times) for these analytes under a wide range of eluent conditions, based solely on their chemical structures. This approach was performed on retention data of inorganic and small organic anions from the “Virtual Column” software (Thermo Fisher Scientific). These retention data were recalibrated via a “porting” methodology on three columns (AS20, AS19, and AS11HC), prior to the QSRR modeling. This provided retention data more applicable on recently produced columns which may exhibit changes of column behavior due to batch-to-batch variability. Molecular descriptors for the analytes were calculated with Dragon software using the geometry-optimized molecular structures, employing the AM1 semi-empirical method. An optimal subset of molecular descriptors was then selected using an evolutionary algorithm (EA). Finally, the QSRR models were generated by multiple linear regression (MLR). As a result, six QSRR models with good predictive performance were successfully derived for a- and b-values on three columns (R2 > 0.98 and RMSE < 0.11). External validation showed the possibility of using the developed QSRR models as predictive tools in IC (Qext(F3) 2 > 0.7 and RMSEP < 0.4). Moreover, it was demonstrated that the obtained QSRR models for the a- and b-values can predict the retention times for new analytes with good accuracy and predictability (R2 of 0.98, RMSE of 0.89 min, Qext(F3) 2 of 0.96 and RMSEP of 1.18 min). © 2016 Elsevier B.V.
Disciplines :
Chemistry
Author, co-author :
Park, S. H.;  Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences-Chemistry, University of Tasmania, Private Bag 75, Hobart, Australia
Haddad, P. R.;  Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences-Chemistry, University of Tasmania, Private Bag 75, Hobart, Australia
Talebi, M.;  Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences-Chemistry, University of Tasmania, Private Bag 75, Hobart, Australia
Tyteca, Eva ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Analyse, qual. et risques - Labo. de Chimie analytique
Amos, R. I. J.;  Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences-Chemistry, University of Tasmania, Private Bag 75, Hobart, Australia
Szucs, R.;  Pfizer Global Research and Development, Sandwich, United Kingdom
Dolan, J. W.;  LC Resources Inc., 1795 NW Wallace Rd., McMinnville, OR, United States
Pohl, C. A.;  Thermo Fisher Scientific, Sunnyvale, CA, United States
Title :
Retention prediction of low molecular weight anions in ion chromatography based on quantitative structure-retention relationships applied to the linear solvent strength model
Publication date :
2017
Journal title :
Journal of Chromatography. A
ISSN :
0021-9673
eISSN :
1873-3778
Publisher :
Elsevier B.V.
Volume :
1486
Pages :
68-75
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
ARC LP12020070
Funders :
ARC - Australian Research Council [AU]
Available on ORBi :
since 30 March 2017

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