chromatography mass spectrometry of polymeric materials
Determination of EDTA in Water Samples by SPE-Gas Chromatography/Mass Spectrometry
... solutions were of analytical grade Milli-Q water was used in all experiments Gas chromatography/ mass spectrometry analysis Gas chromatography was carried out by using HP6890 series gas chromatography ... Journal of Water and Environment Technology, Vol 8, No.4, 2010 chromatography (Nowack et al., 1996; Kemmei et al., 2009), ion chromatography/ mass spectrometry (Bauer et al., ... contribution of STP effluents to EDTA levels in rivers CONCLUSIONS To improve Japan’s recommended method of EDTA determination to a simplified method by using gas chromatography/ mass spectrometry, ...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
... 10-80% of the 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 ... (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...
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Analysis of keto enol tautomers of curcumin by liquid chromatography mass spectrometry
... Ab-binding activities in the context of the therapies for Alzheimer’s disease, Biomaterials 31 (2010) 4179–4185 [14] T.J Novak, R Helmy, I Santos, Liquid chromatography mass spectrometry using the hydrogen/deuterium ... electrospray ionization and tandem mass spectrometry, Rapid Commun Mass Spectrom 20 (2006) 1001–1012 [18] F Payton, P Sandusky, W.L Alworth, NMR study of the solution structure of curcumin, J Nat Prod 70 ... Doctoral Program of Higher Education (No 20110002110052) References Fig Fragmentation of curcumin in keto form and enol form by negative MS/MS because the number of exchangeable hydrogens of the enol...
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Báo cáo khoa học: "Simultaneous Determination of Various Macrolides by Liquid Chromatography/Mass Spectrometry" pps
... r a of erythromycin (A), roxithromycin (B), tylosin (C) and tiamulin (D) Simultaneous Determination of Various Macrolides by Liquid Chromatography/ Mass Spectrometry 107 Table Summarized mass ... (Fig 3) The appearance of fragmentation ions was due to the dissociation of amino or sugar moieties on the structure of drugs The m / z 576.5 and 679.5 in mass spectra of erythromycin and roxithromycin ... corresponding with Simultaneous Determination of Various Macrolides by Liquid Chromatography/ Mass Spectrometry 105 F i g T ot a l ion ch r om a t ogr a p h y (TI C, A) of m a cr olid e a n d t ia m u lin...
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Báo cáo khoa học: "Determination of Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose Oral Administration in Broilers" pdf
... established The limit of detection and limit of quantitation were ng/g and ng/g These values satisfied the acceptance criteria of the limit of detection and limit of quantitation The LOQ of this method ... Limit of detection and limit of quantitation were based on the signal-to-noise ratio based on their areas The signal-to-noise ratio of was accepted for the limit of detection and that of 10 for ... linear regression analysis of the log-transformed tissue concentrations, and was determined at the time when the Determination of Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose...
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Determination of endocrine disrupting compounds in environmental samples using microextraction combined with gas chromatography mass spectrometry
... 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 microextraction and gas chromatography mass spectrometry ... and the effects of these EDCs on humans and wildlife Endocrine disruption mechanisms include antagonism of hormones and inhibition of the synthesis and metabolism of hormones Many of the known EDCs ... DETERMINATION OF ENDOCRINE DISRUPTING COMPOUNDS IN ENVIRONMENTAL SAMPLES USING MICROEXTRACTION COMBINED WITH CHROMATOGRAPHY/ MASS SPECTROMETRY CHANBASHA BASHEER (M Sc.) A THESIS SUBMITTED FOR THE DEGREE OF...
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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
... better recoveries than SFE Liquid chromatography- atmospheric pressure ionization- ion trap mass spectrometry was used to investigate the chemical degradation behavior of N-methylcarbamate in environmental ... liquid chromatography- atmospheric pressure chemical ionization- ion trap mass spectrometry, coupled to microwave-assisted extraction technique, was also been applied to analyze the residues of N-methylcarbamate ... artificial UV lighting) Hydrolysis was found to be very much 143 pH-dependent irrespective of the type of water matrix Light intensity could prompt degradation significantly under mild alkaline...
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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 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, 151, and 210 For the LC separation of ... considered, a total of five degrees of freedom was required, and the OA (2 7) matrix was, therefore, chosen so as to have sufficient degrees of freedom for the assignment of the variables under ... probably because of the loss of a 1-propene (C3H6) molecule, the other is the base peak at m/z 153 [M+H-57]+, which probably resulted from the neutral loss of a CH3NCO group MS studies of other carbamate...
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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
... used 89 4.1.3.5 Influence of matrix, moisture, aging of spiked soil on recovery of tested pollutants The effects of matrix, moisture and aged spiked soil on recovery of analytes were investigated ... (sum of squares) for each main factor is the sum of SS from three columns since each of them has three degrees of freedom and occupies three 103 columns Specifically, SS for the factor A is sum of ... (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...
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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
... application of LC-APCI-MS for the determination of carbamates: carbofuran and 3hydroxy-carbofuran, and the analysis of triazine herbicides in water [8] LC-ESI-MS ... simultaneous determination of carbamate pesticides [7, 9-12] In addition, with the introduction of ion-trap mass analyzers (ITMS), higher sensitivity and accuracy of the structural information ... major TPs of propoxur by mean of LC-API-ITMS The performance of two MS ionization techniques (ESI and APCI) for such identification purposes are compared; (2) To investigate the degradation of propoxur...
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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
... order to remove possible traces of PAHs, PCBs, triazines, carbamates and other organic contaminants, 100 g of each of the soil sample was immersed in 200 ml 46 each of methanol, acetone, dichloromethane ... ion-trap mass spectrometer (all ThermoQuest, San Jose, CA, USA) The instrument was initially tuned based on a mixture of caffeine, L-methionyl-arginyl-phenylananyl-alanine acetate·H2O and a mixture of ... recovery and analytical precision, a portion of each fish sample was added an appropriate volume of standard solution, thereby obtaining the required levels of target analytes To ensure that the analytes...
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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
... liquid chromatography (HPLC) Mass spectrometry (MS), as one of LC detection techniques, has attracted growing interest because of the potential to yield information on the relative molecular mass ... technique for the analysis of mixtures that, often contain unknowns and/or analytes in low concentration, the combination of chromatography (for separation) with mass spectrometry (as detector ... the detection of emitted ions that have been separated or filtered according to their mass- to-charge (m/z) ratio The resulting mass spectrum is a plot of the relative abundance of the generated...
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current practice of gas chromatography mass spectrometry
... Applications of Gas Chromatography Mass Spectrometry in Clinical and Forensic Toxicology and Doping Control Hans H Maurer 355 15 Detection of Drugs of Abuse by Gas Chromatography Mass Spectrometry ... Gas Chromatography Mass Spectrometry of Drugs in Biological Fluids After Automated Sample Pretreatment M Valca´rcel, M Gallego, and S Ca´rdenas 10 Gas Chromatography Mass Spectrometry Analysis of ... Satterfield 369 16 Gas Chromatography Mass Spectrometry Analysis of Explosives Shmuel Zitrin 387 Part V Food-Related Applications 17 Gas Chromatography Mass Spectrometry Analysis of Flavors and Fragrances...
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Tài liệu Báo cáo khóa học: Quantitative analysis, using MALDI-TOF mass spectrometry, of the N-terminal hydrolysis and cyclization reactions of the activation 2 process of onconase pdf
... on cyclization of the amino terminal glutamine residues of tryptic peptides of streptococcal PepM49 protein Resolution of cyclized peptides by HPLC and characterization by mass spectrometry Int ... Materials and methods Completion of the hydrolysis was confirmed by the disappearance of the (Met1)-ONC (M23L) signal in the MALDI-TOF mass spectra h after the addition of AAP The pH was adjusted to ... analyzed by MALDI-TOF MS The addition of the protease is considered the zero time point The relative intensities of the peaks from the mass spectra were used to calculate the fraction of Pyr-ONC (M23L),...
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analysis and deformulation of polymeric materials paints, plastics, adhesives, and inks
... spectrogram of right side of laminated film IR spectrum of left side of laminated film IR spectrum of right side of laminated film DSC thermogram of laminated film Scheme for preparation of liquid plastic ... for analysis of polymers, biomaterials, adhesives, and insulators 2.6.3 Applications Analysis of polymeric materials is a good application of SIMS, where metallic elements are not often observed ... Photograph of FEIN FOCUS Microfocus FXS-160.30 X-Ray Inspection and Testing System Figure 3.29 Mass spectrometer spectrum of toluene Figure 3.30 Photograph of Bruker REFLEX MALD TOF -Mass Spectrometer Figure...
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liquid chromatography - mass spectrometry an introduction
... QC Q-ToF Q-ToF–LC–MS–MS RF RIC RMM RSD S/N SDM SD SDS–PAGE Ser SIM SIR SRM TFA Thr TIC ToF Trp TSP Tyr UV V vol/vol Val mass spectrometry in combination with mass spectrometry (tandem mass spectrometry) ... interface liquid chromatography and mass spectrometry • To understand the requirements of an interface between liquid chromatography and mass spectrometry and the performance of the combined system ... combination of chromatography and mass spectrometry (MS) is a subject that has attracted much interest over the last forty years or so The combination of gas chromatography (GC) with mass spectrometry...
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mass spectrometry of proteins and peptides
... type of mass spectrometer—a hybrid quadrupole/time -of- flight instrument (Q/TOF [14] or QqTOF [15]) was introduced QqTOF instruments allow the acquisition of tandem mass spectra with very high mass ... we often perform multiple stages of tandem mass spectrometry (MS/MS/MS or MS3) using nanoelectrospray on an ion trap (17) Thus, the first stage of tandem mass spectrometry produces the series of ... “Subsequencing”: 15 Cutoff for monoisotopic to average mass calculations: Below this cutoff, monoisotopic masses are calculated for fragment ion masses whereas above this cutoff average mass values are...
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mass spectrometry of polymers new techniques
... desorption ionization mass spectrometry Limits of detection Mass- to-charge ratio Matrix-assisted laser desorption ionization mass spectrometry Mass spectrometry Tandem mass spectrometry Sodium ... Material Electrospray ionization -mass spectrometry Fourier transform ion cyclotron resonance- mass spectrometry Fourier transform mass spectrometry Gas chromatography mass spectrometry High density ... SALDI-MS SIMS TFA TOF VOCs High performance liquid chromatography ultraviolet Inductive coupled plasma mass spectrometry Ion mobility spectrometry mass spectrometry Liquid chromatography Laser...
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niessen - liquid chromatography - mass spectrometry 3e [lcms] (crc, 2006)
... of the 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 ... Multiple charging enables the use of mass analysers with limited mass range in the analysis of high molecular -mass compounds A number of concepts important in mass spectrometry is summarized and ... result in the formation of fragment ions © 2006 by Taylor and Francis Group, LLC Mass spectrometry 27 Information from mass spectrometry All mass analysers perform a separation of ions according to...
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