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Gas Chromatography - Derivatization, Sample Preparation, Application最新文献

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Gas Chromatographic-Mass Spectrometric Detection of Pesticide Residues in Grapes 葡萄中农药残留的气相色谱-质谱联用检测
Gas Chromatography - Derivatization, Sample Preparation, Application Pub Date : 2019-09-04 DOI: 10.5772/intechopen.80438
Mahadev C. Khetagoudar, M. Chetti, D. Bilehal
{"title":"Gas Chromatographic-Mass Spectrometric Detection of Pesticide Residues in Grapes","authors":"Mahadev C. Khetagoudar, M. Chetti, D. Bilehal","doi":"10.5772/intechopen.80438","DOIUrl":"https://doi.org/10.5772/intechopen.80438","url":null,"abstract":"GC-MS/MS method has been developed and validated for the determination and quantification of 35 multi-class pesticide residues in grape samples. Pesticides are selected from different families including organochlorines, organophosphorus, carbamates, pyrethroids, triazines, triazoles, pyrazoles, etc. The QuEChERS-dSPE (dispersive solid-phase extraction) method was used for the extraction of residues of pesticide. An extra cleanup step was included with the help of a primary secondary amine (PSA) and graphitized carbon black (GCB). Recoveries ranged from 70 to 100% with 14% relative standard deviation (RSD). Other parameters such as precision, recoveries, limit of detection (LOD), limit of quantification (LOQ), and linearity were also studied. Finally, the proposed analytical method was successfully employed for the determination of residues of pesticide in grape samples.","PeriodicalId":192795,"journal":{"name":"Gas Chromatography - Derivatization, Sample Preparation, Application","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115836971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Gas Chromatography in Food Authentication 气相色谱法在食品鉴定中的应用
Gas Chromatography - Derivatization, Sample Preparation, Application Pub Date : 2019-08-05 DOI: 10.5772/INTECHOPEN.88512
K. Pastor, M. Ačanski, D. Vujić
{"title":"Gas Chromatography in Food Authentication","authors":"K. Pastor, M. Ačanski, D. Vujić","doi":"10.5772/INTECHOPEN.88512","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.88512","url":null,"abstract":"Authentication of food products and food fraud detection are of great importance in the modern society. The application of sophisticated instrumentation, such as gas chromatography (GC), with this aim helps to improve the protection of consumers. Gas chromatography mostly combined with the most powerful detector, a mass spectrometer (MS), and various multivariate data processing tools is in the last few decades being increasingly applied in authenticity and traceability of a wide spectra of food products. These include animal and plant products, beverages and honey. This chapter gives an overview of the most recent applications of gas chromatography technique in determining food authenticity, described in scientific literature.","PeriodicalId":192795,"journal":{"name":"Gas Chromatography - Derivatization, Sample Preparation, Application","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134308934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Sample Preparation Techniques for Gas Chromatography 气相色谱的样品制备技术
Gas Chromatography - Derivatization, Sample Preparation, Application Pub Date : 2019-04-02 DOI: 10.5772/INTECHOPEN.84259
F. Falaki
{"title":"Sample Preparation Techniques for Gas Chromatography","authors":"F. Falaki","doi":"10.5772/INTECHOPEN.84259","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.84259","url":null,"abstract":"","PeriodicalId":192795,"journal":{"name":"Gas Chromatography - Derivatization, Sample Preparation, Application","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121527087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Derivatization Methods in GC and GC/MS GC和GC/MS衍生化方法
Gas Chromatography - Derivatization, Sample Preparation, Application Pub Date : 2018-12-05 DOI: 10.5772/INTECHOPEN.81954
S. Moldoveanu, V. David
{"title":"Derivatization Methods in GC and GC/MS","authors":"S. Moldoveanu, V. David","doi":"10.5772/INTECHOPEN.81954","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.81954","url":null,"abstract":"The first part of this chapter presents the main objectives for performing derivatization of a sample to be analyzed by gas chromatography (GC) or gas chromatography/mass spectrometry (GC/MS). The derivatization is typically done to change the analyte properties for a better separation and also for enhancing the method sensitivity. In GC/MS, derivatization may improve the capability of compound identification. Examples illustrating such improvements are included. The second part describes several types of derivatization that are more frequently used in analytical practice. These include alkylation (e.g., methylation), formation of aryl derivatives, silylation (e.g., formation of trimethylsilyl derivatives), acylation (e.g., reactions with acyl chlorides or with chloroformates), and several other types of derivatizations. The chapter also presents typical derivatizations for analytes with specific functional groups and discusses artifact formation in certain derivatization reactions.","PeriodicalId":192795,"journal":{"name":"Gas Chromatography - Derivatization, Sample Preparation, Application","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129379536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 50
Trends for Pyrazole Fragmentation Determined by Gas Chromatography Coupled with Mass Spectrometry 气相色谱-质谱联用测定吡唑破碎度的趋势
Gas Chromatography - Derivatization, Sample Preparation, Application Pub Date : 2018-12-03 DOI: 10.5772/INTECHOPEN.81563
C. Frizzo, B. Hennemann, Bruna L. Kuhn, K. M. Wust, Alisson V. Paz, M. Martins, N. Zanatta, H. Bonacorso
{"title":"Trends for Pyrazole Fragmentation Determined by Gas Chromatography Coupled with Mass Spectrometry","authors":"C. Frizzo, B. Hennemann, Bruna L. Kuhn, K. M. Wust, Alisson V. Paz, M. Martins, N. Zanatta, H. Bonacorso","doi":"10.5772/INTECHOPEN.81563","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.81563","url":null,"abstract":"In this chapter, we present a review on pyrazole fragmentation by gas chromatography coupled with mass spectrometry, in order to evaluate the substituent effect on pyrazole fragmentation. Our objective was to present a comprehensive study on the fragmentation pattern of substituted pyrazoles, contribute to the systematization of knowledge, and offer support to researchers in the characterization of pyrazoles via a comprehensive and versatile technique such as gas chromatography coupled with mass spectrometry. The pyrazole fragmentation showed two important processes: (i) expulsion of HCN from [M] and [M–H] and (ii) the loss of N2 from [M–H] . Substituents such as D, Me, Br, Cl, and Ph did not influence these two processes; however, the presence of nitro, acetyl, oxime, diphenyl, or methyl and nitro in the ortho-position transforms the two processes into secondary fragmentation or results in their absence in the fragmentation of the said pyrazoles.","PeriodicalId":192795,"journal":{"name":"Gas Chromatography - Derivatization, Sample Preparation, Application","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127750277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Introductory Chapter: Gas Chromatography - The Most Versatile Analytical Technique 导论章:气相色谱-最通用的分析技术
Gas Chromatography - Derivatization, Sample Preparation, Application Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.81693
P. Kusch
{"title":"Introductory Chapter: Gas Chromatography - The Most Versatile Analytical Technique","authors":"P. Kusch","doi":"10.5772/INTECHOPEN.81693","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.81693","url":null,"abstract":"Gas chromatography (GC) is a type of chromatography. According to the International Union of Pure and Applied Chemistry (IUPAC) recommendation, gas chromatography is defined as a separation technique in which the mobile phase is a gas. Gas chromatography is always carried out in a column [1]. GC is a separation and detection method for sample mixtures, whose components can be volatilized without thermal decomposition.","PeriodicalId":192795,"journal":{"name":"Gas Chromatography - Derivatization, Sample Preparation, Application","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131888657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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