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Prediction of the retention of s ‐triazines in reversed‐phase high‐performance liquid chromatography under linear gradient‐elution conditions
Author(s) -
D'Archivio Angelo Antonio,
Maggi Maria Anna,
Ruggieri Fabrizio
Publication year - 2014
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201400346
Subject(s) - chromatography , elution , high performance liquid chromatography , gradient elution , chemistry , phase (matter) , reversed phase chromatography , analytical chemistry (journal) , organic chemistry
In this paper, a multilayer artificial neural network is used to model simultaneously the effect of solute structure and eluent concentration profile on the retention of s ‐triazines in reversed‐phase high‐performance liquid chromatography under linear gradient elution. The retention data of 24 triazines, including common herbicides and their metabolites, are collected under 13 different elution modes, covering the following experimental domain: starting acetonitrile volume fraction ranging between 40 and 60% and gradient slope ranging between 0 and 1% acetonitrile/min. The gradient parameters together with five selected molecular descriptors, identified by quantitative structure‐retention relationship modelling applied to individual separation conditions, are the network inputs. Predictive performance of this model is evaluated on six external triazines and four unseen separation conditions. For comparison, retention of triazines is modelled by both quantitative structure–retention relationships and response surface methodology, which describe separately the effect of molecular structure and gradient parameters on the retention. Although applied to a wider variable domain, the network provides a performance comparable to that of the above “local” models and retention times of triazines are modelled with accuracy generally better than 7%.