This work presents a new methodology to quantify ethyl carbamate (EC) in fortified wines. The presented
approach combines the microextraction by packed sorbent (MEPS), using a hand-held automated ana-
lytical syringe, with one-dimensional gas chromatography coupled with mass spectrometry detection
(GC–MS). The performance of different MEPS sorbent materials was tested, namely SIL, C2, C8, C18, and
M1. Also, several extraction solvents and the matrix effect were evaluated. Experimental data showed
that C8 and dichloromethane were the best sorbent/solvent pair to extract EC. Concerning solvent and
sample volumes optimization used in MEPS extraction an experimental design (DoE) was carried out. The
best extraction yield was achieved passing 300 L of sample and 100 L of dichloromethane. The method
validation was performed using a matrix-matched calibration using both sweet and dry fortified wines,
to minimize the matrix effect. The proposed methodology presented good linearity (R2 = 0.9999) and high
sensitivity, with quite low limits of detection (LOD) and quantification (LOQ), 1.5 g L−1 and 4.5 g L−1,
respectively. The recoveries varied between 97% and 106%, while the method precision (repeatability
and reproducibility) was lower than 7%. The applicability of the methodology was confirmed through
the analysis of 16 fortified wines, with values ranging between 7.3 and 206 g L−1. All chromatograms
showed good peak resolution, confirming its selectivity. The developed MEPS/GC–MS methodology arises
This work presents a new methodology to quantify ethyl carbamate (EC) in fortified wines. The presentedapproach combines the microextraction by packed sorbent (MEPS), using a hand-held automated ana-lytical syringe, with one-dimensional gas chromatography coupled with mass spectrometry detection(GC–MS). The performance of different MEPS sorbent materials was tested, namely SIL, C2, C8, C18, andM1. Also, several extraction solvents and the matrix effect were evaluated. Experimental data showedthat C8 and dichloromethane were the best sorbent/solvent pair to extract EC. Concerning solvent andsample volumes optimization used in MEPS extraction an experimental design (DoE) was carried out. Thebest extraction yield was achieved passing 300 L of sample and 100 L of dichloromethane. The methodvalidation was performed using a matrix-matched calibration using both sweet and dry fortified wines,to minimize the matrix effect. The proposed methodology presented good linearity (R2 = 0.9999) and highsensitivity, with quite low limits of detection (LOD) and quantification (LOQ), 1.5 g L−1 and 4.5 g L−1,respectively. The recoveries varied between 97% and 106%, while the method precision (repeatabilityand reproducibility) was lower than 7%. The applicability of the methodology was confirmed throughthe analysis of 16 fortified wines, with values ranging between 7.3 and 206 g L−1. All chromatogramsshowed good peak resolution, confirming its selectivity. The developed MEPS/GC–MS methodology arises
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