chromatography mass spectrometry gc ms analysis

... emphasized previously, LC-MS is one of the most powerful techniques for the analysis of polar pesticide residues In the past few years, much work has been done by LC-MS to analyze carbamate pesticides ... was 0.1 s, with an interchannel delay of 0.02 s and a mass span of 1 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...

Ngày tải lên: 16/09/2015, 17:13

... mobile phase was acetonitrile-water (40:60) at a flow rate of 0.8 ml/min PAH analysis was performed on a Waters (Milford, Massachusetts, USA) 600E HPLC system equipped with a Waters 700 autosampler, ... Continued Trang 12a (f) water a (e) dichloromethane Fig 4-4 (a) Chromatography of standard mixture of five carbamates; (b-f) chromatography obtained after simulated MAE (6 min heating at 95ºC, ... compare the MAE efficiency for relatively more polar organic pollutants, such as the carbamates themselves (propoxur, methiocarb, propham, thiuram, chlopropham) and triazines (atrazine, simazine)...

Ngày tải lên: 16/09/2015, 17:13

... relatively high polarity, low volatility and thermal instability, which prevent direct analysis by GC-MS LC-TSP-MS, for the determination of carbamate pesticides have been widely studied in recent ... techniques with TSP-MS and PB-MS [7] Doerge and Bajic reported the Trang 2application of LC-APCI-MS for the determination of carbamates: carbofuran and hydroxy-carbofuran, and the analysis of triazine ... samples by using LC-APCI-ITMS were carried out in this study Our aims were as follows: (1) To identify the major TPs of propoxur by mean of LC-API-ITMS The performance of two MS ionization techniques...

Ngày tải lên: 16/09/2015, 17:13

... LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY (LC-MS) In recent decades, LC-MS has experienced impressive progress, both in terms of technological development and application The combination of chromatography ... interface techniques, LC-API-MS has assumed great importance in the analysis of polar, low volatile, and thermally instable organic compounds, for which direct analysis by GC- MS is not possible [2] ... 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...

Ngày tải lên: 16/09/2015, 17:13

... techniques include Thin Layer Chromatography (TLC); Gas Chromatography (GC); Infrared Spectroscopy (IR); High Performance Liquid Chromatography (HPLC); Mass Spectrometry (MS); Fluorometric detection; ... 11GC-MS: Gas chromatography – mass spectrometry OGSR: Organic gun shot residue SEM: Scanning electron microscopy THC: Tetrahydrocannabinol THC acid: Tetrahydrocannabinol acid TLC: Thin layer chromatography ... 17Wu et al[29] used a tandem mass spectrometry system (MS-MS) to show that the organic components of GSR are more characteristic than their inorganic counterparts MS-MS has the added advantage...

Ngày tải lên: 07/08/2017, 15:46

... overcome this drawback, comprehen‑ sive two‑dimensional gas chromatography–mass spectrometry (GC × GC–MS) was combined with multivariate data analysis, revealing that compounds like citronellal, citronellol, ... two-dimensional chromato-grams were generated using the GCImage software (Zoex Corp., Houston, TX, USA) Multivariate analysis The raw unfolded GC × GC–Q(TIC)MS chromatograms were firstly converted ... generally observed in their corresponding chromatograms Con-sequently, a comprehensive two-dimensional gas chro-matography–mass spectrometry (GC × GC–MS) is a powerful tool for overcoming this drawback,...

Ngày tải lên: 29/05/2020, 13:56

... sugars, from food extracts Subsequently, gas chromatography mass spectrometry (GC/MS) is employed for the quantitative analysis and confirmation of GC-amenable pesticides.A recovery of 85 to 101% ... method for analyzing Carbaryl residues in white radishes using liquid chromatography.Chromatography tandem Mass Spectrometry (LC-MS /MS)”.Research’s objectiveThe objective for this study is evaluate ... value Modern medicine reveals that 100 grams of radish provides essential nutrients, including 1.4 grams of protein, 3.7 grams of carbohydrates, and 1.5 grams of fiber Additionally, it contains 40...

Ngày tải lên: 16/12/2021, 17:08

... sugars, from food extracts Subsequently, Gas Chromatography Mass Spectrometry (GC/MS) is employed for the quantitative analysis and confirmation of GC-amenable pesticides.A recovery of 85 to 101% ... method for analyzing Carbaryl residues in white radish using liquid chromatography.Chromatography tandem Mass Spectrometry (LC-MS /MS)”.Research’s objectiveThe objective for this study is evaluate ... nutritional value of radishes, revealing that 100 grams of this vegetable contains 1.4 grams of protein, 3.7 grams of carbohydrates, and 1.5 grams of fiber Additionally, radishes provide essential...

Ngày tải lên: 02/04/2022, 16:30

... separated in subsequent GC/MS analysis Herein, we developed a novel strategy by chiral derivatization combined with liquid chromatog-raphy/tandem mass spectrometry (LC-ESI-MS/MS) analysis for highly ... 2HG in mass spectrometry Chalmers et al.19 used chiral derivatization reagent of (D)-2-butanol and acetic anhydride to derivatize 2HG followed by gas chromatography/mass spectrometry (GC/MS) anal-ysis ... LC-ESI-MS/MS analysis The quantification of TSPC labeled D-2HG and L-2HG were performed on the LC-ESI-MS/MS sys-tem consisting of an AB 3200 QTRAP mass spectrometer (Applied Biosyssys-tems, Foster...

Ngày tải lên: 04/12/2022, 16:24

... [1,2].Metabolomic analysisrequirestheuseofhighlypowerfulanalytical techniques, such asmass spectrometry (MS) hyphenated to chromatographic separation techniques, such as liquid chromatography (LC) or gas chromatography, ... werepurchasedfromWaters(Milford,MA,USA) 2.4 UHPSFC/MS/MS instrumentation UHPSFC/MS/MS analysis was performed on the Acquity UPC2 (Waters, Milford, MA, USA) hyphenated with the Synapt G2-Si (Waters) QTOF mass spectrometer The ... Supercritical fluid chromatography Metabolites Amino acids Human plasma Mass spectrometry a b s t r a c t Theapplicability ofultrahigh-performancesupercriticalfluidchromatographycoupledwithmass spec-trometry...

Ngày tải lên: 25/12/2022, 02:51

... food extracts Subsequently, gas chromatography-mass spectrometry (GC/MS) is employed for accurate quantification and confirmation of pesticides suitable for GC analysis.A recovery of 85 to 101% ... Residues in White Radish Using Liquid Chromatography,” aiming to accurately detect harmful pesticide residues in radish.Chromatography tandem Mass Spectrometry (LC-MS /MS)”.Research’s objectiveThe objective ... Radish is a nutrient-rich vegetable that provides 1.4 grams of protein, 3.7 grams of carbohydrates, and 1.5 grams of dietary fiber per 100 grams It is a good source of essential minerals, including...

Ngày tải lên: 15/02/2023, 08:52

... chromatography in combination with mass spectrometryLC–MS–MS (high performance) liquid chromatography in combination with tandem mass spectrometryLC–ToF-MS (high performance) liquid chromatography in combination ... time-of-flight mass analyser MID multiple-ion detection MIKES mass-analysed ion kinetic energy spectrometry MRM multiple-reaction monitoring Trang 16MS–MS mass spectrometry in combination with massspectrometry ... Trang 14Abbreviations, Acronyms and SymbolsCID collision-induced dissociation GalNAc N-acetylgalactosamine Trang 15GC–MS gas chromatography – in combination with massspectrometryGlcNAc N-acetylglucosamine...

Ngày tải lên: 11/04/2014, 06:58

... 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 ... Coupled with Injection Port-Derivatization Gas Chromatography/Mass Spectrometry Trang 11ECD Electron capture detector GC Gas chromatography LC Liquid chromatography LLE Liquid-liquid extraction ... Lee Analysis of Endocrine Disrupting Alkylphenols and Bisphenol-A using Hollow Fiber-Protected Liquid-phase Microextraction Coupled with Injection Port-Derivatization Gas Chromatography/Mass Spectrometry,...

Ngày tải lên: 16/09/2015, 17:12

... separation on the basis of their mass-to-charge ratio by a mass spectrometer (for instance a quadrupole MS); 1) To be published Trang 10 transmission of the ions through the mass separation unit (for ... parts, under the general title Water quality — Application of inductively coupled plasma mass spectrometry (ICP-MS):  Part 1: General guidelines and basic principles  Part 2: Determination of ... STANDARD ISO 17294-2:2003(E)Water quality — Application of inductively coupled plasma mass spectrometry (ICP-MS) — Part 2: Determination of 62 elements WARNING — Persons using this part of ISO...

Ngày tải lên: 03/07/2016, 18:45

... procedure up to gelation Identification and quantification was performed by gas chromatography–mass spectrometry (GC–MS) and proton nuclear magnetic resonance (1H-NMR) spectroscopy The data obtained ... combined extracts (40 ml) were either concentrated (for NMR analysis) or used to prepare methanol solutions for GC/MS analysis 2.2.3 1H NMR analysis 1 H NMR spectra were measured at room temperature ... dimethyl-sulphoxide (DMSO-d6) as a solvent and naphtalene as an internal standard 2.2.4 GC-MS analysis Chromatographic measurements were performed with a gas chromatograph HP 6890 equipped with a mass spectrometer...

Ngày tải lên: 17/12/2017, 14:32

... common PAHs in grilled pork by mass spectrometry (GC-MS) using standard internal substances Some specifications such as sample preparation - analysis conditions, analysis limits (MDL, MQL) and ... standards for instrumental quantitation Materials: PAH analysis was carried out using a gas chromatography equipped with MS 5980C inert XL/CI MSD (Agilent Technologies) In addition, some equipment ... 9CONCLUSION The research had successfully developed the PAHs analysis process in meat products by combining QuEChERS extraction and GC-MS analysis The procedure used internal standard reagents to...

Ngày tải lên: 20/12/2019, 16:39

... common PAHs in grilled pork by mass spectrometry (GC-MS) using standard internal substances Some specifications such as sample preparation - analysis conditions, analysis limits (MDL, MQL) and ... standards for instrumental quantitation Materials: PAH analysis was carried out using a gas chromatography equipped with MS 5980C inert XL/CI MSD (Agilent Technologies) In addition, some equipment ... 9CONCLUSION The research had successfully developed the PAHs analysis process in meat products by combining QuEChERS extraction and GC-MS analysis The procedure used internal standard reagents to...

Ngày tải lên: 14/01/2020, 17:37

... common PAHs in grilled pork by mass spectrometry (GC-MS) using standard internal substances Some specifications such as sample preparation - analysis conditions, analysis limits (MDL, MQL) and ... standards for instrumental quantitation Materials: PAH analysis was carried out using a gas chromatography equipped with MS 5980C inert XL/CI MSD (Agilent Technologies) In addition, some equipment ... 9CONCLUSION The research had successfully developed the PAHs analysis process in meat products by combining QuEChERS extraction and GC-MS analysis The procedure used internal standard reagents to...

Ngày tải lên: 09/02/2020, 09:07

... common PAHs in grilled pork by mass spectrometry (GC-MS) using standard internal substances Some specifications such as sample preparation - analysis conditions, analysis limits (MDL, MQL) and ... standards for instrumental quantitation Materials: PAH analysis was carried out using a gas chromatography equipped with MS 5980C inert XL/CI MSD (Agilent Technologies) In addition, some equipment ... 9CONCLUSION The research had successfully developed the PAHs analysis process in meat products by combining QuEChERS extraction and GC-MS analysis The procedure used internal standard reagents to...

Ngày tải lên: 02/03/2020, 16:02

... concentrated to 2 mL and filtered through a 0.45-μm micropore film prior to GC–MS analysis Gas chromatography/mass spectrometry GC–MS analysis was performed using an Agilent 7890A gas chromatograph equipped ... the soluble components [6–8] Gas chromatography–mass spectrometry (GC–MS) is typically employed to analyze volatile components in fla-vorings Prior to GC–MS analysis, volatile components were ... extraction time This MTBE solution was directly analyzed by GC–MS A quantitative comparison experiment was performed using SDE/GC–MS SDE was conducted as described by Wang et al [5] Jujube extract...

Ngày tải lên: 29/05/2020, 12:34