liquid chromatography mass spectrometry
liquid chromatography - mass spectrometry an introduction
... performance) liquid chromatography in combination with mass spectrometry (high performance) liquid chromatography in combination with tandem mass spectrometry (high performance) liquid chromatography ... Performance Liquid Chromatography 7 10 10 11 12 14 16 18 21 vi Liquid Chromatography Mass Spectrometry 2.5 Quantitation Using High Performance Liquid Chromatography 2.6 The Need for High Performance Liquid ... Thr TIC ToF Trp TSP Tyr UV V vol/vol Val mass spectrometry in combination with mass spectrometry (tandem mass spectrometry) multiple stages of tandem mass spectrometry National Institute of Health...
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niessen - liquid chromatography - mass spectrometry 3e [lcms] (crc, 2006)
... Chromatography, edited by Joseph Sherma and Bernard Fried 56 Gas Liquid Solid Chromatography, V G Berezkin 57 Complexation Chromatography, edited by D Cagniant 58 Liquid Chromatography Mass Spectrometry, ... on-line coupling of liquid chromatography and mass spectrometry (LC–MS) These research efforts were mainly inspired by the great success of combined capillary gas chromatography mass spectrometry (GC–MS) ... reason, concise introductions in liquid chromatography (Ch 1) as well as mass spectrometry (Ch 2) precede a general discussion on interfacing chromatography and mass spectrometry (Ch 3) Subsequently,...
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Analysis of keto enol tautomers of curcumin by liquid chromatography mass spectrometry
... Alzheimer’s disease, Biomaterials 31 (2010) 4179–4185 [14] T.J Novak, R Helmy, I Santos, Liquid chromatography mass spectrometry using the hydrogen/deuterium exchange reaction as a tool for impurity ... Analysis of curcuminoids by positive and negative electrospray ionization and tandem mass spectrometry, Rapid Commun Mass Spectrom 20 (2006) 1001–1012 [18] F Payton, P Sandusky, W.L Alworth, NMR study ... form, and two phenolic hydrogens and one aliphatic hydroxyl hydrogen of enol form are exchangeable Mass spectra of curcumin tautomers showed apparent differences (Fig 3) In positive detection, curcumin...
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Báo cáo khoa học: "Simultaneous Determination of Various Macrolides by Liquid Chromatography/Mass Spectrometry" pps
... z 576.5 and 679.5 in mass spectra of erythromycin and roxithromycin were corresponding with Simultaneous Determination of Various Macrolides by Liquid Chromatography/ Mass Spectrometry 105 F i ... tiamulin (D) Simultaneous Determination of Various Macrolides by Liquid Chromatography/ Mass Spectrometry 107 Table Summarized mass spectra of the drugs used experiments D ru gs Ery th ro my cin ... detection are very sensitive to environmental condition The determination method by gas chromatography- mass spectrometry (GC-MS) has been reported [5] This method needs the derivatization procedures...
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Báo cáo khoa học: "Determination of Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose Oral Administration in Broilers" pdf
... Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose Oral Administration in Broilers 37 Fig Structure of roxithromycin (left) and erythromycin (right) Fig Representative mass spectrum ... － － － － － － － － － －, not detected or under LOQ Determination of Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose Oral Administration in Broilers 39 Ta ble Concentration ... Cecilia, A Confirmatory method for macrolide residues in bovine tissues by micro -liquid chromatography- tandem mass spectrometry J Chromatogr A 2001, 926(1), 97-104 Demotes-Mainaird, F., Vincon,...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 6
... from time-aged soil, MAE exhibited better recoveries than SFE Liquid chromatography- atmospheric pressure ionization- ion trap mass spectrometry was used to investigate the chemical degradation ... more rapidly at higher light exposure and pH Furthermore, liquid chromatography- atmospheric pressure chemical ionization- ion trap mass spectrometry, coupled to microwave-assisted extraction technique,...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 5
... of carbamate pesticides in environmental waters by using liquid chromatography- atmospheric pressure chemical ionization-ion trap mass spectrometry, coupled to microwave-assisted extraction technique, ... was 0.1 s, with an interchannel delay of 0.02 s and a mass span of mass unit Quantitation was based on the area under the peak from the mass chromatogram of the above molecular ions at m/z 60, ... through the APCI source Mass spectra collected in full-scan mode were obtained by scanning over a range of m/z 50 to 250 Maximum injection time was set at 150 ms Time scheduled mass conditions were...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 4
... (min) Fig 4-7 (a) Chromatography of standard mixture of four carbamates (b) Chromatography obtained after optimum MAE (6 heating at 80 ºC, extraction solvent: methanol; (c) Chromatography obtained ... dichloromethane water a a 10 20 30 (min) 10 20 30 (min) Fig 4-4 (a) Chromatography of standard mixture of five carbamates; (b-f) chromatography obtained after simulated MAE (6 heating at 95ºC, 80% ... properties of supercritical fluids (SCFs) have made SFE a practical alternative to traditional liquid solvent extraction techniques [39, 40] For example, supercritical CO2, which has been used...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 3
... (at a detection wavelength of 225 nm) and LC-APCI-ITMS 3.2.2 Preconcentration by Liquid- Liquid Extraction Liquid- liquid extraction with dichloromethane was used for concentrating propoxur and its ... (incandescent) and artificial UV lighting) For the first time, liquid chromatography- atmospheric pressure chemical ionization-ion trap mass spectrometry (LC-APCI-ITMS) was used to investigate the chemical ... present in natural water in Singapore, all the water samples were spiked with 30 µg/l of propoxur Liquid- liquid extraction was used here to concentrate propoxur and its TPs after hydrolysis The degradation...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 2
... Thermo Separation gradient HPLC system (Model SCM 1000) coupled to a Finnigan MAT LCQ ion-trap mass spectrometer (all ThermoQuest, San Jose, CA, USA) The instrument was initially tuned based ... and then rinsed with deionized water The fish samples were grinded in a mortar and pestle with liquid nitrogen until a homogenous fine powder was obtained In order to meet the fortification standards ... placed in polyethylene flasks Tortoises were removed from their shells after being submerged in liquid nitrogen, and tissues were then crushed and lyophilized Spiked tortoise samples were prepared...
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Investigation and application of liquid chromatography mass spectrometry in the analysis of polar, less volatile and thermal unstable organic pollutants in environmental and biological samples 1
... Niessen, Liquid Chromatography- Mass Spectrometry (2nd edition), Marcel Dekker, Inc., New York, NY, USA and references therein, 1998 [2] R.D Voyksner, in Electrospray Ionization Mass Spectrometry: ... combination of chromatography (for separation) with mass spectrometry (as detector that provides sensitive and structural information) appears to be an obvious choice However, liquid chromatography ... mobile phase and analytes through the column, LC is also known as high performance liquid chromatography (HPLC) Mass spectrometry (MS), as one of LC detection techniques, has attracted growing interest...
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LIQUID CHROMATOGRAPHY–MASS SPECTROMETRY:AN INTRODUCTION
... performance) liquid chromatography in combination with mass spectrometry (high performance) liquid chromatography in combination with tandem mass spectrometry (high performance) liquid chromatography ... Performance Liquid Chromatography 7 10 10 11 12 14 16 18 21 vi Liquid Chromatography Mass Spectrometry 2.5 Quantitation Using High Performance Liquid Chromatography 2.6 The Need for High Performance Liquid ... LIQUID CHROMATOGRAPHY MASS SPECTROMETRY: AN INTRODUCTION Robert E Ardrey University of Huddersfield, Huddersfield, UK LIQUID CHROMATOGRAPHY MASS SPECTROMETRY: AN INTRODUCTION...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
... base peak Low- to mid -mass sensitivity 197 50% of Mass 442 Mid -mass resolution and sensitivity 199 5-9% of Mass 198 Mid -mass resolution and ... (DECAFLUOROTRIPHENYLPHOSPHINE, DFTPP) Mass (M/z) Relative Abundance Criteria Purpose of Checkpoint1 51 10-80% of the base peak Low -mass sensitivity 68 50% of Mass 198 High -mass resolution and sensitivity...
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Determination of EDTA in Water Samples by SPE-Gas Chromatography/Mass Spectrometry
... Vol 8, No.4, 2010 chromatography (Nowack et al., 1996; Kemmei et al., 2009), ion chromatography/ mass spectrometry (Bauer et al., 1999; Knepper et al., 2005), gas chromatography/ mass spetrometry ... Okumura, 1995), and liquid chromatography/ tandem spetrometry (Quintana and Reemtsma, 2007) To simplify Japan’s recommended method of EDTA determination by using gas chromatography- mass spectrometry, ... Milli-Q water was used in all experiments Gas chromatography/ mass spectrometry analysis Gas chromatography was carried out by using HP6890 series gas chromatography system (Hewlett Packard, Wilmington,...
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Gas Chromatography Mass Spectrometry doc
... tìm kết tương ứng) Hoặc sở để đăng ký chất (nếu phép so sánh không tìm kết tương ứng) Hình 2: Mass- spectrum Trong hình 2, hình ảnh khối cao dodecane Phần nềm GC/MS giống thư viện hình...
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Determination of endocrine disrupting compounds in environmental samples using microextraction combined with gas chromatography mass spectrometry
... Gas chromatography GC/MS Gas chromatography mass spectrometry HS-SPME Headspace-SPME HFM-SPME Hollow fiber protected-SPME HFM-LPME Hollow fiber protected-LPME LC Liquid chromatography LLE Liquid- liquid ... Fiber Membrane-Protected Liquid- Phase Microextraction 54 Coupled with Injection Port-Derivatization Gas Chromatography/ Mass Spectrometry Hollow Fiber Membrane-Protected Liquid- Phase Microextraction ... fiber membrane /liquid- phase microextraction combined with gas chromatography mass spectrometry, J CHROMATOGR A (2003), 1016 (1): 11-20 [3] C Basheer, H K Lee, J P Obbard Application of liquid- phase...
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current practice of gas chromatography mass spectrometry
... Chromatography Mass Spectrometry Principles and Instrumentation of Gas Chromatography Mass Spectrometry W M A Niessen Principles and Applications of Surface Ionization in Gas Chromatography Mass ... and Instrumentation of Gas Chromatography Mass Spectrometry W M A Niessen hyphen MassSpec Consultancy, Leiden, The Netherlands INTRODUCTION Gas chromatography mass spectrometry (GC–MS) is a combination ... Solid-Phase Extraction–Capillary Gas Chromatography Mass Spectrometry for Water Analysis Thomas Hankemeier and Udo A Th Brinkman Gas Chromatography Mass Spectrometry in Occupational and Environmental...
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báo cáo hóa học: " Method optimization and validation for the simultaneous determination of arachidonic acid metabolites in exhaled breath condensate by liquid chromatography-electrospray ionization tandem mass spectrometry" doc
... Felli M, Mondino C, Chiarotti M: Ion trap liquid chromatography/ tandem mass spectrometry analysis of leukotriene B4 in exhaled breath condensate Rapid Commun Mass Spectrom 2004, 18:2723-2729 Montuschi ... necessary research in occupational medicine Methods With recent progress in liquid chromatography separations and mass spectrometry detection systems, improvement in sensitivity and simultaneous ... http://www.occup-med.com/content/1/1/5 tion about collection of exhaled breath condensate is described elsewhere [16] Liquid chromatography Liquid chromatography separation was performed on a Hewlett-Packard HP 1100 series HPLC...
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Báo cáo y học: "Quasi-MSn identification of flavanone 7-glycoside isomers in Da Chengqi Tang by high performance liquid chromatography-tandem mass spectrometry." ppsx
... electrospray mass spectrometry; LC-ESI/MS: liquid chromatography- electrospray mass spectrometry; HPLC-DAD: highperformance liquid chromatography- diode array detection; MS/MS: tandem mass spectrometry; ... Flavanone Aglycones by Negative Ion Liquid Chromatography Electrospray Ion Trap Mass Spectrometry J Am Soc Mass Spectrom 2001, 12:707-715 Stobiecki M: Application of mass spectrometry for identification ... Meanwhile, flavonoids were also studied via mass spectra fragmentation pathway [20-22] Zhou et al [23] described a liquid chromatography- electrospray mass spectrometry (LC-ESI/ MS) method to characterize...
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