gas chromatography and capillary electrophoresis

... 1976 Karasek, F W., and Clement, R E Basic Gas Chromatography-Mass Spectrome- try—Principles and Techniques New York: Elsevier, 1991 Linskens, H F., and Jackson, J F., Eds Gas Chromatography/Mass ... Chromatographic Sci., 24, 529, 1986 Guiochon, G., and Guillemin, C L Gas chromatography, Rev Sci Instrum., 61, 3317, 1990 Mikaya, A I, and Zaikin, V G Reaction gas chromatography/mass spectrometry Mass ... Merck Index, Handbook of Chemistry, Handbook of Chemistry Trang 23 32 Chapter 2 M Interpretation of Mass Spectra and Physics, and even chemical catalogs such as the Aldrich Catalog, and so on Check

Ngày tải lên: 06/10/2016, 09:25

... electrokinetic chromatography, microemulsion elec- trokinetic chromatography, and ultra-high performance liquid chromatography The study focuses on de- termination of male and female steroids from cold and ... with liquid chromatography–tandem mass spectrometry (LC-MS/MS) and gas chromatography-mass spectrometry (GC/MS) [37–39] Despite the strength of chromatographic techniques, cap- illary electrophoresis ... solvent in standards and as the marker of electroosmosis The steroids were used as received and stored in a dark and cold room ( + 4 °C and -20 °C) Botrydial (C 17H 26O 5, 310.38534 g/mol) standard

Ngày tải lên: 25/12/2022, 02:14

... 163 2.1 Pre-capillary complexation 163 2.2 On-capillary complexation 163 3 Micelles 163 4 Capillary electrophoresis driven by electroosmotic flow 163 5 Pressure-driven capillary electrophoresis ... Soga and Ross[7]for the determination of Cu2 +, Ni2 +and Fe2 +, and several inorganic anions and organic acids Re-cently, it was used by Wharton and Stokes[8]for the separation of Cu2+, Ni2+and ... positioning capillary electrophoresis (CE) needs two detectors, placed at each end of the capillary and the sample plug is pressure-delivered between them before Trang 99 Dual-channel capillary electrophoresisThe

Ngày tải lên: 12/12/2017, 06:09

... Trang 1Triple-channel portable capillary electrophoresis instrument with individualbackground electrolytes for the concurrent separations of anionic and cationic species Thanh Duc Mai, Minh ... P.C Hauser, Triple-channel portable capillary electrophoresis instrument with individual background electrolytes for the concurrent separations of anionic and cationic species, Analytica Chimica ... typesetting, and review of the resulting proof before it is published in its final form Please note that during the production process errors may be discovered which could affect the content, and all

Ngày tải lên: 16/12/2017, 18:02

... 2 where x1and x2are mole number of DGEBA and DGEBF contained in 1 g of mixture, respectively, and Mn 1 and Mn 2 are the average molecular weight of DGEBA and DGEBF, respectively Mn 1 and Mn 2 ... chain and R2¼phenyl) Currently, our knowledge about the reactivity of phenol compounds with epoxy and epoxy/amine systems is mainly based on the pioneering work by Shechter and Wynstra[5]and Shechter ... done by an internal standard method using naphthalene as an internal standard Monitored ions were m/z (molecular ion of naphthalene) and 228.1 (molecular ion of BPA) 3 Results and discussion 3.1

Ngày tải lên: 17/12/2017, 14:32

... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from ... meat and meat products by gas chromatography tandem mass spectrometry Tạp chí phân tích Hóa, Lý và Sinh học, 21(4) Tomasz Rejczak, Tomasz Tuzimski (2015) A review of recent developments and trends ... time, monitored SIM ion and regression equation for 16 PAHs by GC-MS t R (min) SIM ion (m/z) standard (IS) Recovery, reproducibility and the analysis limits The recovery and reproducibility (RSD)

Ngày tải lên: 20/12/2019, 16:39

... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from ... meat and meat products by gas chromatography tandem mass spectrometry Tạp chí phân tích Hóa, Lý và Sinh học, 21(4) Tomasz Rejczak, Tomasz Tuzimski (2015) A review of recent developments and trends ... time, monitored SIM ion and regression equation for 16 PAHs by GC-MS t R (min) SIM ion (m/z) standard (IS) Recovery, reproducibility and the analysis limits The recovery and reproducibility (RSD)

Ngày tải lên: 14/01/2020, 17:37

... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from ... meat and meat products by gas chromatography tandem mass spectrometry Tạp chí phân tích Hóa, Lý và Sinh học, 21(4) Tomasz Rejczak, Tomasz Tuzimski (2015) A review of recent developments and trends ... time, monitored SIM ion and regression equation for 16 PAHs by GC-MS t R (min) SIM ion (m/z) standard (IS) Recovery, reproducibility and the analysis limits The recovery and reproducibility (RSD)

Ngày tải lên: 09/02/2020, 09:07

... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from ... meat and meat products by gas chromatography tandem mass spectrometry Tạp chí phân tích Hóa, Lý và Sinh học, 21(4) Tomasz Rejczak, Tomasz Tuzimski (2015) A review of recent developments and trends ... time, monitored SIM ion and regression equation for 16 PAHs by GC-MS t R (min) SIM ion (m/z) standard (IS) Recovery, reproducibility and the analysis limits The recovery and reproducibility (RSD)

Ngày tải lên: 02/03/2020, 16:02

... centrifuge tubes) were washed with soap and water and rinsed with acetone and n-hexane prior to use and between samples Samples: Blank sample was lean pork meat and grilled pork was purchased from ... meat and meat products by gas chromatography tandem mass spectrometry Tạp chí phân tích Hóa, Lý và Sinh học, 21(4) Tomasz Rejczak, Tomasz Tuzimski (2015) A review of recent developments and trends ... time, monitored SIM ion and regression equation for 16 PAHs by GC-MS t R (min) SIM ion (m/z) standard (IS) Recovery, reproducibility and the analysis limits The recovery and reproducibility (RSD)

Ngày tải lên: 01/05/2021, 11:19

... of degradation products ofnonylphenol polyethoxylates and their halogenated derivatives by solid-phase extraction and gas chromatography–tandem mass spectrometry after trimethylsilylation Pham ... layer chromatography or GC with flame ionization detection The products were purified by column chromatography on silica gel Their structures and purities were confirmed by GC–MS and 1H and 13C ... and NP3EO = 1000 ␮g/l) and 4000 ␮g/l (except for BrNP = 8000 ␮g/l and NP2EC and NP3EO = 40000 ␮g/l), were prepared The internal standard solution containing phenanthrene-d10 and pyrene-d10 at 200

Ngày tải lên: 18/10/2022, 15:41

... importance for the evaluation of their quality and their safety and for the understand-ing of their sensory properties [ 3 , 5 , 6 ]. One-dimensional gas chromatography hyphenated to a mass spectrometer ... or-ganiccompoundsfromwhiskeysamplespriortotheirdeterminationbycomprehensivetwo-dimensional gaschromatography(GC× GC)coupledtomassspectrometry(MS).Samplepreparationofthevolatile compounds,importantfortheorganolepticcharacteristicsofdifferentwhiskeysandtheiracceptanceand liking ... Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy e Department of Sciences and Technologies for Human and Environment, University Campus Bio-Medico

Ngày tải lên: 20/12/2022, 21:29

... enthalpy ( G sp a(T)) and the time relative to the various polar molecules by using the different IGC models and methods, and the results are depicted in Tables4and 5 Tables4, 5and SI 1–12 clearly ... dispersion of particles in liquid, powder handling, and many other applications [1] The surface properties of a crystal are crucial to the understand- ing and design of materials for many applications ... (alkanes, alkenes, and aromatics of the linear, branched, and cyclic types) on four different UiO-66 materials (UiO-6 6, UiO-6 6-Me, UiO-6 6-Me2, UiO-6 6-NO2) using pulse gas chromatography in

Ngày tải lên: 25/12/2022, 02:51

... nitrogen gas Single and dual regulator pneumatics controllers (Markes Interna- tional Gas01 and Gas03) were used for setting backing pressures 2.4 RRFs RRFs are calculated for GA, GB, GD, GF, and ... concentration stock solutions in ace- tonitrile and analyzing the solution by gas chromatography-flame ionization detection (GC-FID) and followed standard operating pro- cedure Hazardous Materials ... tubes are spiked with focusing agent and exposed to select con- centrations of nerve gases (G-series) and blistering agents (mus- tard gas) to establish RRFs and are monitored over 14 days eval-

Ngày tải lên: 31/12/2022, 09:37

... ASSOCIATION AND A COMMITTEE OF PUBLISHERS L IBRARY OF C ONGRESS C ATALOGING - IN -P UBLICATION D ATA Chemical reactions in gas, liquid, and solid phases : synthesis, properties, and application ... Gumargalieva and G E Zaikov  Chapter 16 Quantum-Chemical Calculation of Olefins of Cationic Polymerization Branching in -, - and  Position on Relations to V A Babkin, D S Andreev, T V Peresypkina and ... this volume is a complete guide to the subject of kinetic and mechanisms of chemical reactions in gas, liquid and solid states The editors and contributors will be happy to receive from the readers

Ngày tải lên: 28/03/2014, 10:20

... GC and SFC: Very Basic Definitions  Gas chromatography – chromatography using a gas as the mobile phase and a solid/liquid as a stationary phase – In GC, the analytes migrate in the gas phase, ... “Derivatization for Gas and Liquid Chromatography , in Ultratrace Analysis of Pharmaceuticals and Other Compounds of Interest, Wiley, 1986 Applications of Derivatization and GC in Doping  Example: ... overload – N up to 12000 Types of Columns for GC  GLC:     Gas- liquid chromatography (partition) – most common GSC: Gas- solid chromatography (adsorption) FSWC: fused-silica wall-coated open...

Ngày tải lên: 27/06/2014, 01:20

... solutions 3.12 Calibration Standard (CAL) A solution prepared from the primary dilution standard solution or stock standard solutions and the internal standards and surrogate analytes The CAL ... rules and land disposal restrictions The laboratory using this method has the respons-ibility to protect the air, water, and land by minimizing and controlling all releases from fume hoods and ... (FD1 and FD2) Two separate samples collected at the same time and place under identical circumstances, and treated exactly the same throughout field and laboratory procedures Analyses of FD1 and...

Ngày tải lên: 22/03/2014, 14:20

... namely capillary zone electrophoresis (CZE), capillary gel electrophoresis (CGE), isotachophoresis (ITP), isoelectric focusing (IEF), capillary electrokinetic chromatography (EKC) and capillary ... developed and applied for enantioseparations so far, see examples in section 2.4 2.2.2 Capillary electrochromatography Capillary electrochromatography (CEC) combines electrophoretic and chromatographic ... Chiral Capillary Electrophoresis in Current Pharmaceutical and Biomedical Analysis Figure 2.12 Separation principle of capillary electrochromatography Chiral CEC stationary phases included in capillary...

Ngày tải lên: 28/06/2014, 06:20

... mobile and stationary phase: Chromatography (C); Liquid chromatography (LC); Gas chromatography (GC); Paper chromatography (PC); Thin-layer chromatography (TLC) Column chromatography (CC) Gas- liquid ... (packed, capillary) Thus, a primary classification could be gas- solid chromatography and gas- liquid-solid chromatography Capillary columns are used mostly, but not exclusively They are the latest and ... 1998) Hyphenated gas chromatography also include coupling of gas chromatographs orthogonally - multidimensional gas chromatography (MDGC or GCGC) Hyphenated techniques in gas chromatography This...

Ngày tải lên: 28/06/2014, 14:20

... separation, and accurate and precise quantification of each compound in a mixture consist of thousands and thousands different components The development of the chromatography showed enormous race and ... could be increase the volatility and make possible to analyze these compounds in Gas Chromatography Using capillary column, two dimensional Gas Chromatography and some convenient detectors, around ... Luisa-Fernanda Espinosa, Silvio Pantoja and Jỹrgen Rullkửtter Chapter Fatty Acids Analysis of Photosynthetic Sulfur Bacteria by Gas Chromatography Marớa Teresa Nỳủez-Cardona Chapter 117 Gas Chromatography...

Ngày tải lên: 28/06/2014, 17:20