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Fast screening of trace multiresidue pesticides on fruit and vegetable surfaces using ambient ionization tandem mass spectrometry.

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Title: Fast screening of trace multiresidue pesticides on fruit and vegetable surfaces using ambient ionization tandem mass spectrometry.
Authors: Cheng, Sy-Chyi1 (AUTHOR), Lee, Ruei-Hao1 (AUTHOR), Jeng, Jing-Yueh2 (AUTHOR), Lee, Chi-Wei3,4 (AUTHOR), Shiea, Jentaie1,5,6 (AUTHOR) jetea@mail.nsysu.edu.tw
Source: Analytica Chimica Acta. Mar2020, Vol. 1102, p63-71. 9p.
Subjects: Tandem mass spectrometry, Desorption electrospray ionization, Pesticides, Bell pepper, Thermal desorption, Fluorescent probes, Tomatoes
Abstract: An ambient ionization tandem mass spectrometric approach was developed to rapidly screen multiresidue pesticides on fruits and vegetables without sample preparation and chromatographic separation. The residual pesticides on fruits and vegetables were collected by sweeping a metallic probe across the sample surface for 2 cm. The analytes collected on the probe were desorbed and ionized in a thermal desorption electrospray ionization (TD-ESI) source, after which analyte ions were detected by a triple quadruple mass analyzer (QqQ) operated in multiple reaction monitoring (MRM) mode. With this TD-ESI/MS/MS approach, 308 pesticides were monitored, where a mixture containing 15 pesticide standards was successfully identified to demonstrate the capability of this approach to screen trace multiresidue pesticides. The approach had reasonable detection limits (<50 ppb) and reproducibility (RSD: 8.43%, n = 9) from the analysis of a benthiazole standard solution. Real samples including a tomato and bell pepper were analyzed using this TD-ESI/MS/MS approach. After TD-ESI/MS/MS analysis, the organic solvent extracts from the same samples were subjected to TD-ESI/MS/MS, gas chromatography mass spectrometry (GC-MS), and liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis for validation. Image 1 • TD-ESI/MS/MS was developed to rapidly screen 308 residual pesticides on fruits and vegetables within 1 min. • The samples were directly characterized without sample preparation and chromatographic separation. • The identity of pesticides on bell peppers and tomatoes revealed by TD-ESI/MS/MS was confirmed with GC-MS and LC-MS/MS. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:An ambient ionization tandem mass spectrometric approach was developed to rapidly screen multiresidue pesticides on fruits and vegetables without sample preparation and chromatographic separation. The residual pesticides on fruits and vegetables were collected by sweeping a metallic probe across the sample surface for 2 cm. The analytes collected on the probe were desorbed and ionized in a thermal desorption electrospray ionization (TD-ESI) source, after which analyte ions were detected by a triple quadruple mass analyzer (QqQ) operated in multiple reaction monitoring (MRM) mode. With this TD-ESI/MS/MS approach, 308 pesticides were monitored, where a mixture containing 15 pesticide standards was successfully identified to demonstrate the capability of this approach to screen trace multiresidue pesticides. The approach had reasonable detection limits (<50 ppb) and reproducibility (RSD: 8.43%, n = 9) from the analysis of a benthiazole standard solution. Real samples including a tomato and bell pepper were analyzed using this TD-ESI/MS/MS approach. After TD-ESI/MS/MS analysis, the organic solvent extracts from the same samples were subjected to TD-ESI/MS/MS, gas chromatography mass spectrometry (GC-MS), and liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis for validation. Image 1 • TD-ESI/MS/MS was developed to rapidly screen 308 residual pesticides on fruits and vegetables within 1 min. • The samples were directly characterized without sample preparation and chromatographic separation. • The identity of pesticides on bell peppers and tomatoes revealed by TD-ESI/MS/MS was confirmed with GC-MS and LC-MS/MS. [ABSTRACT FROM AUTHOR]
ISSN:00032670
DOI:10.1016/j.aca.2019.12.038