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dc.contributor.authorWu, Min-Lien_US
dc.contributor.authorWu, Yi-Chengen_US
dc.contributor.authorChen, Yu-Chieen_US
dc.date.accessioned2019-04-02T06:00:43Z-
dc.date.available2019-04-02T06:00:43Z-
dc.date.issued2019-02-01en_US
dc.identifier.issn1618-2642en_US
dc.identifier.urihttp://dx.doi.org/10.1007/s00216-018-1539-zen_US
dc.identifier.urihttp://hdl.handle.net/11536/148799-
dc.description.abstractTrace and toxic pesticide residues may still remain on crops after harvest. Thus, maximum residual levels (MRLs) of pesticides on crops have been regulated. To determine whether the remaining pesticide residue level is below MRL, time-consuming sample pretreatment is needed prior to analysis of crop samples by suitable analytical tools. By elimination of sample pretreatment steps, a high-throughput method can be developed to determine the presence of pesticide residues directly on intact crops. Carbon fiber ionization mass spectrometry (CFI-MS) is effective in determining analytes with different polarities in solid, liquid, and vapor phases in open air. Moreover, the vapor derived from solid or liquid samples possessing high vapor pressure can be readily detected by CFI-MS. The setup of CFI-MS is straightforward. A carbon fiber (diameter of similar to 10m and length of similar to 1cm) is placed close (similar to 1mm) to the inlet of the mass spectrometer applied with a high voltage (-4.5kV). No direct electrical contact applied on the carbon fiber is required. When placing the sample with certain vapor pressure underneath the carbon fiber, analyte ions derived from the sample can be readily detected by the mass spectrometer. Given that most pesticides possess a certain vapor pressure (similar to 1.33x10(-5)-similar to 1.33x10(-4)Pa), we herein develop a qualitative and quantitative analysis method to determine pesticide residues on intact fruits such as tomato based on CFI-MS without requiring any sample pretreatment. Atrazine, ametryn, carbofuran, chlorpyrifos, isoprocarb, and methomyl were selected as model samples. Low limits of detection (at nM range) were achieved for the model pesticides using the current approach. Moreover, we demonstrated that the precision and accuracy of quantitative analysis of similar to 5% and similar to 2%, respectively, could be achieved using this approach.en_US
dc.language.isoen_USen_US
dc.subjectPesticidesen_US
dc.subjectRapid screeningen_US
dc.subjectCarbon fiberen_US
dc.subjectMass spectrometryen_US
dc.titleDetection of pesticide residues on intact tomatoes by carbon fiber ionization mass spectrometryen_US
dc.typeArticleen_US
dc.identifier.doi10.1007/s00216-018-1539-zen_US
dc.identifier.journalANALYTICAL AND BIOANALYTICAL CHEMISTRYen_US
dc.citation.volume411en_US
dc.citation.spage1095en_US
dc.citation.epage1105en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000457362200013en_US
dc.citation.woscount0en_US
Appears in Collections:Articles