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Validation of a qualitative screening method for pesticides in fruits and vegetables by gas chromatography quadrupole-time of flight mass spectrometry with atmospheric pressure chemical ionization
dc.contributor.author | Portoles, Tania | |
dc.contributor.author | Mol, Johannes G. J. | |
dc.contributor.author | Sancho, Juan V | |
dc.contributor.author | Lopez, Francisco | |
dc.contributor.author | Hernandez, Felix | |
dc.date.accessioned | 2015-07-02T07:38:36Z | |
dc.date.available | 2015-07-02T07:38:36Z | |
dc.date.issued | 2014-08-01 | |
dc.identifier.citation | PORTOLÉS NICOLAU, T...[et al.]. Validation of a qualitative screening method for pesticides in fruits and vegetables by gas chromatography quadrupole-time of flight mass spectrometry with atmospheric pressure chemical ionization. Analytica Chimica Acta, v. 838 (August 2014), pp. 76–85 | ca_CA |
dc.identifier.uri | http://hdl.handle.net/10234/125864 | |
dc.description.abstract | A wide-scope screening method was developed for the detection of pesticides in fruit and vegetables. The method was based on gas chromatography coupled to a hybrid quadrupole time-of-flight mass spectrometer with an atmospheric pressure chemical ionization source (GC-(APCI)QTOF MS). A non-target acquisition was performed through two alternating scan events: one at low collision energy and another at a higher collision energy ramp (MSE). In this way, both protonated molecule and/or molecular ion together with fragment ions were obtained in a single run. Validation was performed according to SANCO/12571/2013 by analysing 20 samples (10 different commodities in duplicate), fortified with a test set of 132 pesticides at 0.01, 0.05 and 0.20 mg kg−1. For screening, the detection was based on one diagnostic ion (in most cases the protonated molecule). Overall, at the 0.01 mg kg−1 level, 89% of the 2620 fortifications made were detected. The screening detection limit for individual pesticides was 0.01 mg kg−1 for 77% of the pesticides investigated. The possibilities for identification according to the SANCO criteria, requiring two ions with a mass accuracy ≤±5 ppm and an ion-ratio deviation ≤±30%, were investigated. At the 0.01 mg kg−1 level, identification was possible for 70% of the pesticides detected during screening. This increased to 87% and 93% at the 0.05 and 0.20 mg kg−1 level, respectively. Insufficient sensitivity for the second ion was the main reason for the inability to identify detected pesticides, followed by deviations in mass accuracy and ion ratios. | ca_CA |
dc.format.extent | 10 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.relation.isPartOf | Analytica Chimica Acta, v. 838 (August 2014) | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/CNE/1.0/ | * |
dc.subject | Gas chromatography | ca_CA |
dc.subject | Hybrid quadrupole time-of- flight mass spectometer | ca_CA |
dc.subject | Atmospheric pressure chemical ionization | ca_CA |
dc.subject | Screening | ca_CA |
dc.subject | Identification | ca_CA |
dc.subject | Pesticides | ca_CA |
dc.title | Validation of a qualitative screening method for pesticides in fruits and vegetables by gas chromatography quadrupole-time of flight mass spectrometry with atmospheric pressure chemical ionization | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1016/j.aca.2014.06.006 | |
dc.rights.accessRights | info:eu-repo/semantics/restrictedAccess | ca_CA |
dc.relation.publisherVersion | http://www.sciencedirect.com/science/article/pii/S0003267014007193# | ca_CA |
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