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• W2531268081 abstract "In order to improve analysis of analytes in trace amounts in a complex matrix, we developed a novel post-processing method, named Chromatographic Peak Reconstruction (CPR), to process the recorded data from gas chromatography/time-of-flight mass spectrometry (GC/TOFMS).For a trace ion, the relative deviation (δ) between the adjacent scanned mass-to-charge ratios (m/z) was found to be inversely proportional to its MS peak intensity. Based on this relationship, the thresholds of δ value within the specified intensity segments were estimated by the CPR and used to screen out the suspicious scan-points in the extracted ion chromatographic (EIC) peak. Then, the intensities of these suspicious scan-points were calibrated to reconstruct a new EIC peak.In the qualitative analysis of 118 pesticides, 107 out of the test pesticides can be confirmed. The corrected response ratios of the qualitative ion (q) over the quantitative ion (Q), q/Q, became closer to their references. In the quantitative analysis of 10 test pesticides at 5 ppb, the relative errors of the calculated concentrations after using the CPR were below ±1.55%, down from ±2.29% without using the CPR.The developed CPR showed great potential in the analysis of trace analytes in complex matrices. It was proved to be a helpful data processing method for the monitoring of trace pesticide residues. Copyright © 2016 John Wiley & Sons, Ltd." @default.
• W2531268081 created "2016-10-21" @default.
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• W2531268081 date "2016-11-06" @default.
• W2531268081 modified "2023-09-24" @default.
• W2531268081 title "Chromatographic peak reconstruction algorithm to improve qualitative and quantitative analysis of trace pesticide residues" @default.
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• W2531268081 doi "https://doi.org/10.1002/rcm.7762" @default.
• W2531268081 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27723938" @default.
• W2531268081 hasPublicationYear "2016" @default.
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