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44 results on '"Matisová, Eva"'

21. Liquid Phase Microextraction Techniques as a Sample Preparation Step for Analysis of Pesticide Residues in Food.

Author

Andraščíková, Mária, Matisová, Eva, and Hrouzková, Svetlana

Subjects
*EXTRACTION (Chemistry), *CHEMICAL sample preparation, *PESTICIDES, *FOOD chemistry, *ORGANIC solvents, *LIQUID-liquid extraction
Abstract

Many conventional sample preparation methods are tedious, time-consuming, and use high volume of organic solvent. Minimized sample preparation methods, which use significantly smaller volume of organic solvent, represent an alternative to these methods. Three liquid phase microextraction (LPME) techniques: single drop microextraction, dispersive liquid-liquid microextraction, and hollow fiber liquid phase microextraction and a variety of its modifications are reviewed. Advantages and limitations are discussed. Extraction parameters influencing the extraction efficiency are evaluated. Applicability of LPME methods for pesticide residues analysis in various food matrices is overviewed. Determination of low-level pesticide residues was realized predominantly by chromatographic methods utilizing selective detectors. Powerful features of mass spectrometric detection for identification and determination of pesticide residues are pointed out. [ABSTRACT FROM AUTHOR]

Published
2015
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43. Optimization of Conditions for PTV Large-Volume Injection Combined with Fast GC-MS

Author

Korenková, Eva, Matisová, Eva, and Slobodník, Jaroslav

Abstract

Large-volume injection utilizing programmable temperature vaporizer in solvent vent mode is combined with fast capillary gas chromatography and mass spectrometric detection. Optimized injection and chromatographic conditions made possible manual injection of a 20-μL ethyl acetate extract containing 15 organochlorine pesticides and their separation on a short, 0.1-mm-i.d. column in less than 8 min.

Published
2004
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44. Determination of persistent organohalogen pollutants using GC/MS/MS methods

Author

Grabic, Roman, Pacáková, Věra, Ševčík, Jiří, and Matisová, Eva

Abstract

Conclusions o MSiMS methods for analysis of PCDD/Fs, PCBs, OCPs, and PBDES were develoPed o GC separations were optimized for MS/MS detection methods o GC/MS/MS optimized methods were validated. o Limits of quantification at level 0.1 - I pg/pl were achieved. o Linear response over four orders of magnitude was achieved except for some OCPs. o The selectivity of methods is better or comparable with a reference HRMS method' o Cost of GC/MS/MS analysis is significantly lower comPared to GC/HRMS o Developed methods were successfully applied for o Human blood, milk and adipose tissue analysis o Studies of de novo synthesis and destruďion of halogenated POP o In vitro study of PCB accumulation in human cells o List of application is enclosed Page 12

Published
2006

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