Wyniki wyszukiwania dla: GAS-LIQUID CHROMATOGRAPHY

• Partition coefficients of selected environmentally important volatile organic compounds determined by gas - liquid chromatography with polydimethylsiloxane stationary phase

  Publikacja

  • A. Kloskowski
  • W. Chrzanowski
  • M. Pilarczyk
  • J. Namieśnik

  - Rok 2005

  Przedstawiono wartości współczynników podziału (stałych podziału) 14 lotnych związków organicznych istotnych dla stanu środowiska (często oznaczanych w powietrzu w pomieszczeniach zamkniętych) między fazą gazową (N2) a ciekłą (PDMS). Wyznaczano je dwiema technikami (izotermiczną i z liniowo programowanym wzrostem temperatury). Dowiedziono, że istnieje możliwość wyznaczania współczynników podziału techniką LTPRI w oparciu o skalę...

• Headspace liquid phase microextraction for quantitation of hexanal in potato crisps by gas chromatography

  Publikacja

  • M. Kaykhaii
  • M. Rahmani

  - Journal of Separation Science - Rok 2007

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• Application of normal-phase high-performance liquid chromatography followed by gas chromatography for analytics of diesel fuel additives

  Publikacja

  • G. Boczkaj
  • M. Jaszczołt
  • A. Przyjazny
  • M. A. Kamiński

  - ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2013

  The paper presents the results of investigations on new procedures of determination of selected cleaning additives in diesel fuel. Two procedures: one-step analysis using gas chromatography with flame ionization detection (GC-FID) or mass spectrometry (GC-MS) and a two-step procedure in which normal-phase high-performance liquid chromatography (NP-HPLC) was used for preliminary separation of the additives, were compared. The additive...

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• Application of normal-phase high-performance liquid chromatography followed by gas chromatography for analytics of diesel fuel additives

  Publikacja

  • G. Boczkaj
  • M. Jaszczołt
  • A. Przyjazny
  • M. Kamiński

  - ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2013

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• Application of dispersive liquid-liquid microextraction for the determination of selected organochlorine pesticides in honey by gas chromatography - mass spectrometry

  Publikacja

  • M. Kujawski
  • E. Pinteaux
  • J. Namieśnik

  - EUROPEAN FOOD RESEARCH AND TECHNOLOGY - Rok 2012

  Dispersive liquid-liquid microextraction (DLLME) is a rapid and easy technique that consumes minute amounts of organic solvents. In this work, we present chemometric study on optimization of DLLME parameters for the extraction of aldrin, endrin, lindane, alfa-endosulfan, 4,4'-DDT and its metabolites from honey matrix. Method quantification limits (MQLs) vary between 0.3 ng/g for 2,4'-DDE and 4,4'-DDE to 13.2 ng/g for alfa-endosulfan...

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• Measurement of activity coefficients at infinite dilution of organic solutes in the ionic liquid 1-hexyl-1,4-diaza[2.2.2]bicyclooctanium bis(trifluoromethylsulfonyl)imide using gas–liquid chromatography

  Publikacja

  • Ł. Marcinkowski
  • A. Kloskowski
  • J. Namieśnik

  - JOURNAL OF CHEMICAL THERMODYNAMICS - Rok 2014

  Based on gas–liquid chromatography (GLC) retention data, activity coefficients at infinite dilution of 39 different solutes in the ionic liquid 1-hexyl-1,4-diaza[2.2.2]bicyclooctanium bis(trifluoromethylsulfonyl)imide ([HDABCO][NTf2]) have been determined. Measurements covered a broad range of types of organic solutes including alkanes, alcohols, ketones, benzene derivatives and McReynold’s compounds. Activity coefficients were...

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• Headspace Liquid-Phase Microextraction of Chlorobenzenes in Soil with Gas Chromatography-Electron Capture Detection

  Publikacja

  • G. Shen
  • H. Lee
  • M. Kaykhaii

  - ANALYTICAL CHEMISTRY - Rok 2003

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• Determination of fuel combustion product in airport runoff water samples using liquid–liquid extraction with gas chromatography–spectrometry

  Publikacja

  • A. Sulej-Suchomska
  • Ż. Polkowska
  • A. Przyjazny
  • Z. Kokot
  • J. Namieśnik

  - International Journal of Environmental Science and Technology - Rok 2016

  Determination of xenobiotics in samples of airport runoff water is both a complex and indispensable task due to an increasing threat resulting from the activities of numerous airports. The aim of this study was to develop, optimize, and validate a procedure based on liquid–liquid extraction (LLE) coupled with gas chromatography–mass spectrometry (GC–MS) for the determination of polycyclic aromatic hydrocarbons (PAHs). So far, no...

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• JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES

  Czasopisma

  ISSN: 1082-6076 , eISSN: 1520-572X

• A rapid dispersive liquid–liquid microextraction of antimicrobial onion organosulfur compounds in animal feed coupled to gas chromatography-mass spectrometry

  Publikacja

  • M. Pastor-belda
  • N. Arroyo-manzanares
  • K. Yavir
  • P. Abad
  • N. Campillo
  • M. Hernandez-Cordoba
  • P. Vinas

  - Analytical Methods - Rok 2020

  A rapid analytical procedure is proposed for determining two antimicrobial onion organosulfur compounds, propyl disulfide (PDS) and propyl propane thiosulfonate (PTSO), in animal feed. The use of PTSO as a natural ingredient in animal feed is allowed due to its antimicrobial activity against pathogenic organisms. Two analytical methodologies using gas chromatography coupled to mass spectrometry (GC-MS) are compared. After the extraction...

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