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环境样品中PCBs的测定
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作者 宋云横 门雅莉 曲健 《环境保护科学》 CAS 2000年第S1期60-61,共2页
本文详细地介绍了应用 GC/MS或GC/ECD测定环境样品样中 PCBS的分析方法及样品前处理的方法,并给出了 30个行政检查样品的测定结果。
关键词 多氯联苯 气相色谱/质谱
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应用GC-MS/MS技术检测水果蔬菜中22种残留农药 被引量:2
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作者 郑申西 柯华 +3 位作者 刘巧 陈柯星 朱宝平 林专红 《分析测试学报》 CAS CSCD 北大核心 2007年第z1期259-261,共3页
To establish a new GC-MS/MS method for quantitative detection of 22 kinds of pesticide in fruit and vegetable including organic phosphorus,carbamate & pyrethrin etc.Working was performed by Xcalibur software with ... To establish a new GC-MS/MS method for quantitative detection of 22 kinds of pesticide in fruit and vegetable including organic phosphorus,carbamate & pyrethrin etc.Working was performed by Xcalibur software with multitask mode.We Carried on qualitative and quantitative analysis to mass spectrum of MS/MS in order to obtained a credible experiment result.This method is sensitive and accurate,it is suitable for determination of multifarious pesticide residues. 展开更多
关键词 gas chromatography mass spectrum GC-MS/MS VEGETABLE Pesticide residues
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Integration of GC-MS Based Non-Targeted Metabolic Profiling with Headspace Solid Phase Microextraction Enhances the Understanding of Volatile Differentiation in Tobacco Leaves from North Carolina, India and Brazil 被引量:3
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作者 Dong-Ming Ma Saiprasad V. S. Gandra +1 位作者 Navin Sharma De-Yu Xie 《American Journal of Plant Sciences》 2012年第12期1759-1769,共11页
In this report, gas chromatography-mass spectrometry (GC-MS) based non-targeted metabolomics is used to develop appropriate headspace solid phase microextractions (HS-SPME) to enhance the understanding of volatile com... In this report, gas chromatography-mass spectrometry (GC-MS) based non-targeted metabolomics is used to develop appropriate headspace solid phase microextractions (HS-SPME) to enhance the understanding of volatile complexity of flue-cured tobacco leaves. Non-targeted metabolic profiling of GC-MS shows that the extraction condition of HS-SPME at 100?C for 30 min provides a better metabolite profile than other extraction conditions tested. GC-MS and principal component analyses (PCA) show that among five types of fibers tested, 100 μm polydimethylsiloxane (PMDS), 65 μm polydimethylsiloxane/divinylbenzene (PMDS/DVB) and 75 μm carboxen/polydimethylsiloxane (CAR/ PMS) provide a better reproducible metabolite profile. Based on an appropriate PDMS extraction condition optimized, we use GC-MS analysis and PCA to compare metabolite profiles in flue-cured leaves of tobacco plants grown in North Carolina, India and Brazil, respectively. The resulting data of PCA show that the global metabolic profiles in North Carolina samples are separated from those in Brazil and India samples, two groups of which are characterized by a partially overlapped pattern. Several peaks that were differentially accumulated in samples were annotated to known metabolites by deconvolution analysis, such as norsolanadione, solavetivone and rishtin. Norsolanadione is detected only in Brazil samples. Solavetivone is detected in samples of India and Brazil but not in those of North Carolina. Rishtin is detected in samples of North Carolina and India but not in Brazil samples. These data indicate that not only can a non-targeted metabolic profiling approach enhance the understanding of volatile complexity, but also can identify marker volatile metabolites in tobacco leaves produced in different growth regions. 展开更多
关键词 TOBACCO HEADSPACE SOLID-PHASE MICROEXTRACTION gas chromatography mass spectrum VOLATILE Compounds
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