Development of a single retention time prediction model integrating multiple liquid chromatography systems: Application to new psychoactive substances
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Development of a single retention time prediction model integrating multiple liquid chromatography systems : Application to new psychoactive substances. / Pasin, Daniel; Mollerup, Christian Brinch; Rasmussen, Brian Schou; Linnet, Kristian; Dalsgaard, Petur Weihe.
I: Analytica Chimica Acta, Bind 1184, 339035, 2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Development of a single retention time prediction model integrating multiple liquid chromatography systems
T2 - Application to new psychoactive substances
AU - Pasin, Daniel
AU - Mollerup, Christian Brinch
AU - Rasmussen, Brian Schou
AU - Linnet, Kristian
AU - Dalsgaard, Petur Weihe
N1 - Funding Information: The authors would like to sincerely thank all the contributors of HighResNPS, without whom this study would not be possible. Publisher Copyright: © 2021 The Author(s)
PY - 2021
Y1 - 2021
N2 - Database-driven suspect screening has proven to be a useful tool to detect new psychoactive substances (NPS) outside the scope of targeted screening; however, the lack of retention times specific to a liquid chromatography (LC) system can result in a large number of false positives. A singular stream-lined, quantitative structure-retention relationship (QSRR)-based retention time prediction model integrating multiple LC systems with different elution conditions is presented using retention time data (n = 1281) from the online crowd-sourced database, HighResNPS. Modelling was performed using an artificial neural network (ANN), specifically a multi-layer perceptron (MLP), using four molecular descriptors and one-hot encoding of categorical labels. Evaluation of test set predictions (n = 193) yielded coefficient of determination (R2) and mean absolute error (MAE) values of 0.942 and 0.583 min, respectively. The model successfully differentiated between LC systems, predicting 54%, 81% and 97% of the test set within ±0.5, ±1 and ±2 min, respectively. Additionally, retention times for an analyte not previously observed by the model were predicted within ±1 min for each LC system. The developed model can be used to predict retention times for all analytes on HighResNPS for each participating laboratory's LC system to further support suspect screening.
AB - Database-driven suspect screening has proven to be a useful tool to detect new psychoactive substances (NPS) outside the scope of targeted screening; however, the lack of retention times specific to a liquid chromatography (LC) system can result in a large number of false positives. A singular stream-lined, quantitative structure-retention relationship (QSRR)-based retention time prediction model integrating multiple LC systems with different elution conditions is presented using retention time data (n = 1281) from the online crowd-sourced database, HighResNPS. Modelling was performed using an artificial neural network (ANN), specifically a multi-layer perceptron (MLP), using four molecular descriptors and one-hot encoding of categorical labels. Evaluation of test set predictions (n = 193) yielded coefficient of determination (R2) and mean absolute error (MAE) values of 0.942 and 0.583 min, respectively. The model successfully differentiated between LC systems, predicting 54%, 81% and 97% of the test set within ±0.5, ±1 and ±2 min, respectively. Additionally, retention times for an analyte not previously observed by the model were predicted within ±1 min for each LC system. The developed model can be used to predict retention times for all analytes on HighResNPS for each participating laboratory's LC system to further support suspect screening.
KW - High-resolution mass spectrometry
KW - New psychoactive substances
KW - Retention time prediction
KW - Suspect screening
U2 - 10.1016/j.aca.2021.339035
DO - 10.1016/j.aca.2021.339035
M3 - Journal article
C2 - 34625246
AN - SCOPUS:85114785593
VL - 1184
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
SN - 0003-2670
M1 - 339035
ER -
ID: 281286090