musty earthy odors by headspace solid phase microextraction gas chromatography mass spectrometry
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 ... silica capillary column of a gas chromatography/ mass spectrometry (GC/MS) system Compounds eluting from the GC column are identified by comparing their measured mass spectra and retention times ... (DECAFLUOROTRIPHENYLPHOSPHINE, DFTPP) Mass (M/z) Relative Abundance Criteria Purpose of Checkpoint1 51 10-80% of the base peak Low -mass sensitivity 68
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Determination of EDTA in Water Samples by SPE-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, ... 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 ... Japan’s recommended method of EDTA determination to a simplified method by using gas chromatography/ mass spectrometry, a new solid- phase extraction method of EDTA was developed Satisfactory results...
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Determination of endocrine disrupting compounds in environmental samples using microextraction combined with gas chromatography mass spectrometry
... 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 microextraction ... Membrane-Protected Liquid -Phase Microextraction 54 Coupled with Injection Port-Derivatization Gas Chromatography/ Mass Spectrometry Hollow Fiber Membrane-Protected Liquid -Phase Microextraction for 2.4 ... compounds GC 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...
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Phương pháp SPME và Ứng dụng (Solid-phase microextraction)
... N Y.), 275 Ulrich, Solid- phase microextraction in biomedical analysis, Journal of Chromatography A, 902 (2000) 167-194 L.J.Krutz, S.A.Senseman, A.S.Sciumbato, Solid- phase microextraction for ... D., Chai, M., Zhang, Z., Pawliszyn, J., Solid- Phase Microextraction: An Attractive Alternative, Environmental Lab.11 (1992) 10-15 Pawliszyn, J Solid Phase Microextraction : Theory and Practice ... Pawliszyn, In vivo sampling with solid phase microextraction, Journal of Biochemical and Biophysical Methods, 70 (2007) 181193 Pragst, Application of solid- phase microextraction in analytical toxicology...
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Báo cáo toán học: " Solid-phase microextraction for bioconcentration studies according to OECD TG 305" pdf
... solid- phase microextraction techniques for pharmaceutical and biomedical analyses Anal Sci 2011, 27:893-905 Llompart M, Li K, Fingas M: Solid- phase microextraction and headspace solid- phase microextraction ... York: Wiley-VCH; 1997 Pawliszyn J (Ed): Handbook of Solid Phase Microextraction Peking: Chemical Industry Press; 2009 Alpendurada MF: Solid- phase microextraction: a promising technique for sample ... aqueous matrices, solid- phase microextraction is still a rather unusual method in regulatory ecotoxicological research Here, the potential benefits and drawbacks of solidphase microextraction are...
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Enrichment separation and determinations of cadmium(II) and lead(II) 1 phenyl 1h tetrazole 5 thiol chelates on diaion SP 207 by solid phase extraction flame atomic absorption spectrometry
... compounds by flame atomic absorption spectrometry after solid phase extraction using amberlite XAD-16 resin Fresenius J Anal Chem 368, 358–361 Escudero, L.A., Martinez, L.D., Salonia, J.A., Gasquez, ... 2010) Natural and synthetic solid phase extractors that have high surface area and adsorption capacity, stable for acidic and basic media are preferred for solid phase extraction of metal ions ... combination is not used for the solid phase extraction studies In this work, a simple and accurate procedure for cadmium(II) and lead(II) ions that is based on solid phase extraction of cadmium(II)...
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Báo cáo khoa học: A region within the C-terminal domain of Ure2p is shown to interact with the molecular chaperone Ssa1p by the use of cross-linkers and mass spectrometry doc
... is observed The peptides indicated by arrowheads were identified by exact mass measurement The peptide labeled by curved arrows was identified by tandem mass spectrometry as a mono-linked Ure2p ... 50 M Ure2p 40 408 0 D Ure2p 132 000 Mass (m/z) Counts Intensity (%) 100 80 870 30 000 64 000 98 000 132 000 166 000 200 000 Mass (m/z) Fig High -mass MALDI-TOF mass spectra of the products generated ... chymotryptic peptides modified by nondeuterated and deuterated cross-linkers by MALDI-TOF-TOF mass spectrometry A selection of mass spectra illustrates how the comparison of chymotryptic peptides from...
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Analysis of keto enol tautomers of curcumin by liquid chromatography mass spectrometry
... B.N Timmermann, D.R Gang, 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 ... 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 identification ... of enol In negative detection, mass spectra (Fig 3b and d) were similar to those without use of deuterium (Fig 2b and d) This indicates that major product ions by negative MS/MS not contain exchangeable...
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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 ... ochemical 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 ... 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...
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Báo cáo khoa học: "Determination of Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose Oral Administration in Broilers" pdf
... estimated by the 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 ... － － － － － － － － － － －, not detected or under LOQ Determination of Roxithromycin by Liquid Chromatography/ Mass Spectrometry after Multiple-Dose Oral Administration in Broilers 39 Ta ble Concentration ... and 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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Carbon rich silicon (si1 ycy)for defect engineering of ion implantation damage in devices activated by solid phase epitaxy
... Seminar Figure 2.1 Different damage regions in crystal caused by an amorphizing implantation 18 Figure 2.2 Solid- phase epitaxial regrowth versus annealing time for an amorphous ... 36 Figure 3.1 Substitutional carbon content (measured by XRD) versus total carbon content (measured by SIMS) for Si1-yCy films grown by Chemical Vapor Deposition at different temperatures and ... Si1-yCy layer Punchthrough and threshold implants are indicated by dashed and dotted lines, respectively The EOR defects are represented by solid dots (b) Schematic illustrating the layout dimensions...
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Báo cáo hóa học: " A solid-phase dot assay using silica/gold nanoshells" pptx
... verified by the minor spectral salt-induced changes of stabilized particles, by the positive interaction with complementary analyte (hIgG) molecules in solid- phase dot-immunoassay, and by the absence ... Note that the size of a dot on the membrane strip is determined by the volume of analyte and by the membrane property, but not by the analyte concentration In our experimental conditions (1 ll ... report on the first, to the best of our knowledge, application of silica/gold nanoshells to a solid- phase dot assay in which the nanoshells are used as color markers for biospecific staining of...
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Solid-Phase Synthesis of N-Carboxyalkyl Unnatural Amino Acids
... Solution -Phase Synthesis of Substituted Amines by N-Alkylation with %-Halocarbonyl CNLONSMDQZZZZZZZZZZZZZZZZZZZZ'''13 1.3 Examples of Solid- Phase Synthesis of Substituted AminesZZZZZZ'ZZZ.18 1.3.1 Solid- Phase ... Fmoc Fluorenylmethoxycarbonyl LC/MS Liquid chromatography- mass spectrometry BIG Benzophenone imine of glycine on wang resin HRMS High resolution mass spectrometry Pip Piperidine TBAI Tetrabutylammonium ... utilization of solidphase methods and combinatorial chemistry for the synthesis of amino acid derivatives has become an important methodology since the beginnings of solid- phase peptide synthesis by Merrifield...
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SOLID PHASE ORGANIC SYNTHESIS
... Preparation of Alkenes by β-Elimination Preparation of Alkenes by β-Elimination Preparation of Alkenes by Carbonyl Olefination By Wittig Reaction By Wittig Reaction By Wittig Reaction By Aldol and Related ... Coupling reactions Preparation of Alkanes by Hydrogenation and Reduction Preparation of Alkanes by Hydrogenation and Reduction Preparation of Alkanes by Carbon-Carbon Bond Formation C-Alkylations ... Preparation of Alkenes Preparation of Alkenes by β-Elimination and Reduction • Linkers have been developed that enable the release of amines or other compounds by baseinduced β-elimination • Similarly,...
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TỔNG HỢP PHA RẮN (SOLID PHASE SYNTHESIS)
... Colorimetric Assays • Infrared Spectroscopy • Mass Spectrometry • Nuclear Magnetic Resonance Spectroscopy Linkers: Introduction • Covalently connects molecules to the solid support, and should provide a ... maintaining structural integrity Swelling of Polymer by Solvent ‘Shrunken’ state ‘Swollen’ state : Permeable to solvent and reagent Classification of Solid Support Gel-type supports 1.1 Polystyrene ... PEG-polystyrene graft supports X= OH or NH2 Functionalized PEG-PS Resins Considerations in Choosing a Solid Support • Mode of attachment and cleavage of materials from the resin (linker) • Compatibility...
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Development of ionic liquid based liquid phase microextraction, and zeolite imidazolate frameworks based sorbent phase based microextraction combined with chromatography for applications in environmental analysis
... monitoring S/N Signal-to-noise SPBME Sorbent phase- based microextraction SPE Solid phase extraction µ-SPE Micro -solid- phase extraction SPME Solid- phase microextraction TCAs Tricyclic antidepressants ... sorbent phase- based microextraction (SPBME) including fiber-based solid- phase microextraction (SPME), stir bar sorptive extraction (SBSE), microextraction in a packed syringe (MEPS), micro -solid- phase ... process, three phases are involved in analytes distribution: aqueous phase, headspace phase and extraction phase The overall rate of mass transfer is determined by both the aqueous phase stirring...
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Investigation of advanced light trapping concepts for plasma deposited solid phase crystallised polycrystalline silicon thin film solar cells on glass
... described here: solid phase crystallization (Section 1.3.1), seed layer approach (Section 1.3.2), and liquid phase crystallization (Section 1.3.3) 1.3.1 Solid phase crystallization The solid phase crystallization ... Calculated haze by the phase model vs measured transmitted haze for samples BF1, BF7, and BF11 85 Figure 5-2: Calculated AID, or Angular Resolved Scattering (ARS), by the phase model vs ... Tsuda, High-quality polycrystalline silicon thin film prepared by a solid phase crystallization method, Journal of NonCrystalline Solids, 198-200 (1996) 940-944 [22] M Keevers, T.L Young, U Schubert,...
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Fabrication and characterisation of solid phase crystallised plasma deposited silicon thin films on glass for photovoltaic application
... are successfully prepared by the solid- phase crystallization (SPC) technique on glass, through the control of the PH3 (2% in H2)/SiH4 gas flow ratio The effect of this gas flow ratio on the electronic ... OF CONTENTS 7.3.1 Phase transformation study in FeSi2 films by XRD 157 7.3.2 Crystal quality characteristics study of β-FeSi2 films by Raman 158 7.3.3 Interface study by HRTEM and SIMS ... but also produce greenhouse gases and toxic chemicals such as nitrogen oxides, sulphur dioxide, and volatile organic compounds as their by- products These greenhouse gases are the main contributors...
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Tìm thêm: xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo gắn với các giáo trình cụ thể xác định thời lượng học về mặt lí thuyết và thực tế tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu chỉ tiêu chất lượng 9 tr 25