mass spectrometry gc ms
TECHNIQUES FOR THE ANALYSIS OF ORGANIC CHEMECALS BY INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (ICP-MS) pptx
... capabilities of the ICP -MS instrument, particularly in the sample introduction and plasma systems Details are given in the following sections: Solvent resistant hardware Many ICP -MS instrument fittings, ... account, additional interferences may be formed, as illustrated in Table For quadrupole ICP -MS (ICP-QMS) the established and most effective method of reducing polyatomic interferences in high ... analysis of organics, and this technique is available to any Agilent ICP -MS system fitted with the ShieldTorch System and a mass flow controller capable of adding oxygen to the plasma In routine...
- 6
- 610
- 0
KHỐI PHỔ LC MS mass spectrometry LC MS
... T-Wave thứ hai: cho MS2 TOF: Lựa chọn V mode/ W mode GC- MS Tách GC Xác định MS Có thư viện phổ chuẩn Interface Mass spectrometer acts as a detector for GC LC -MS • Tách LC Xác định MS • Khó khăn: loại ... nhận số lượng chúng tỷ lệ với cường độ tín hiệu Máy MS tứ cực chập (Trip Quad) TSQ (Thermo) WS 2005 Waters Micromass Q-Tof Premier Waters Micromass Q-Tof Premier Phun: Z-spray T-Wave = ion optics ... phun điện ESI (Electrospray Ionization) LC -MS • Tách LC Xác định MS • Khó khăn: loại ảnh hưởng dung môi thành phần pha động; thư viện phổ • Để ghép nối LC MS: • giao diện ion hoá hoá học áp suất...
- 36
- 1,069
- 4
Báo cáo y học: "Quality evaluation of mycelial Antrodia camphorata using high-performance liquid chromatography (HPLC) coupled with diode array detector and mass spectrometry (DAD-MS)" pps
... extraction and high performance liquid chromatography-electrospray ionization tandem mass spectrometry (HPLC-ESI -MS/ MS) Anal Chim Acta 2006, 567(2):218-228 28 Xie PS, Leung AY: Understanding the traditional ... coupled with an ion trap mass spectrometry detector was used The system was equipped with an electrospray ionization (ESI) source and an ion trap analyzer for UV and MS data acquisition A reverse ... study aims to identify the full profile fingerprint of nucleosides and nucleobases in mycelial AC by using high-performance liquid chromatography coupled with diode array detector and mass spectrometry...
- 6
- 312
- 0
Water quality application of inductively coupled plasma mass spectrometry (ICP MS) part 2 determination of 62 elements
... coupled plasma mass spectrometry (ICP -MS) for the determination of elements — Part 1: General guidelines and basic principles Terms and definitions For the purposes of this document, the terms and definitions ... inductively coupled plasma mass spectrometry Blackie & Son Ltd., London (1989) [5] JARVIS, K.E GRAY, A.L and HOUK, R.S Handbook of inductively coupled plasma mass spectrometry, Blackie, Glasgow ... 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 62 elements...
- 28
- 376
- 0
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
... which are referred to as quasi -MS/ MS /MS ions The comparison of the spectra of quasi -MS/ MS and of quasi -MS/ MS /MS may yield the quasi-third order precursor ions The quasi -MS4 spectra may be obtained ... spectrometry; LC-ESI /MS: liquid chromatography-electrospray mass spectrometry; HPLC-DAD: highperformance liquid chromatography-diode array detection; MS/ MS: tandem mass spectrometry; RDA: retroDiels-Alder; ... minutes respectively which underwent CID = 30 v to obtain quasi -MS/ MS /MS spectra We found an unusual phenomenon in the quasiMS /MS/ MS spectra from m/z 271, i.e the ions of m/z 227, 203, 199,187,...
- 10
- 297
- 0
Phương pháp phổ khối lượng (Mass Spectrometry - MS)
... không ngắt chân không phận phân tích khối (mass analyzer) phát (detector) nên phận nạp mẫu nguồn ion hoá GC/ MS LC /MS có khác biệt: − Với GC/ MS, đầu GC đưa trực tiếp vào nguồn ion hoá khối phổ ... liền với thiết bị phân tích khối Giao diện kết nối GC vào MS tương đối đơn giản Sơ đồ khối cấu tạo thiết bị GC/ MS- MS (kiểu tứ cực chập ba) − Với LC /MS, đầu LC dòng dung môi pha động đưa trực tiếp ... Monitoring) MRM (Multiple Reaction Monitoring) Đối với MS tứ cực chập ba, máy đo khối phổ hai lần liên tiếp (MS/ MS), kỹ thuật ghi phổ MS/ MS có độ nhạy cao thường sử dụng SRM MRM + SRM: cô lập...
- 25
- 3,050
- 14
Ecological Assessment of Water Quality by Three-species Acute Toxicity Test and GC/MS Analysis - A Case Study of Agricultural Drains
... for fish in acute toxicity tests were used as water quality indexes - 225 - GC/ MS Analysis of Agricultural Chemicals GC/ MS analysis was applied to 68 kinds of agricultural chemicals These compounds ... ecotoxicity test, and finally acetone solution was analyzed by GC/ MS RESULTS AND DISCUSSION Ecotoxicity Level of River Water Histograms of each ecotoxicity effect ratio (growth inhibition ratio ... drains when agricultural chemicals are applied In addition, analysis of agricultural chemicals by GC/ MS was simultaneously carried out and their ecotoxicity potential was discussed MATERIALS AND...
- 8
- 667
- 0
Determination of EDTA in Water Samples by SPE-Gas Chromatography/Mass Spectrometry
... SPE-derivatization -GC/ MS method should be considered for the Japanese Standard Methods for the Examination of Water as an EDTA analytical method The next stage to add this new SPE-derivatization -GC/ MS method ... held at 300ºC for The carrier gas (helium) flow rate was set at 1.2 mL/min Mass spectrometry was carried out using a 5973 Mass Selective Detector (Hewlett Packard, Wilmington, DE, USA) in electron-ionization ... et al., 1996; Kemmei et al., 2009), ion chromatography /mass spectrometry (Bauer et al., 1999; Knepper et al., 2005), gas chromatography /mass spetrometry (Nishikawa and Okumura, 1995), and liquid...
- 7
- 689
- 0
Nghiên cứu điều kiện phân tích các hợp chất cơ clo PCB trong mẫu môi trường bằng phương pháp GC MS
... đối tượng nêu phương pháp sắc kí khí-khối phổ (GC/ MS) Tập trung nghiên cứu vấn đề sau: Tối ưu điều kiện phân tích 12 đồng loại WHO-PCB thiết bị GC/ MS - Khảo sát cột mao quản - Chọn chương trình ... Jef Focant, Catherine Pirard, Anne-Cecile Massart, Gauthier Eppe, Edwin dePauw (2004) “Measurement of Dioxin and WHO-PCBs in Foodstuffs using GCxGCIDTOFMS”,Organohalogen Compound, Vol 66, pp.253-258 ... WHO-PCB tiến hành Sắc kí khí khối phổ GC6 890/ MSD5972A Hewlett Packard, USA Để tìm điều kiện phân tích tối ưu thiết bị tiến hành khảo sát cột sắc ký DB- 5MS cột BPX-DXN với thông số chương trình...
- 11
- 1,021
- 1
Xây dựng qui trình giám định viên nén TFMPP (m trifuoromethylphenylpiperazine) bằng GC MS
... lớp mỏng (TLC), quang phổ hồng ngoại (FTIR), sắc ký khí, sắc kí khí khối phổ (GC- FID, GC- MS) , sắc ký lỏng khối phổ (LC /MS) 1.3.1 Nguyên tắc giám định ma túy: Nhằm thống đảm bảo chấp nhận quốc tế ... định tính định lƣợng m-TFMPP thiết bị GC- MS, luận văn nghiên cứu vấn đề sau đây: Nghiên cứu điều tối ƣu để tách m-TFMPP hỗn hợp ATS thƣờng gặp khác thiết bị GC- MS Khảo sát điều kiện tách, chiết m-TFMPP ... thiết bị GC- MS để định tính định lƣợng m-TFMPP: Loại khối phổ sử dụng: Tứ cực Cột Rtx- 5MS (30m x 0,25mm x 0,25µm) Chế độ chạy EI + (Electron Impact) Kiểu va chạm điện tử điện 70 ev Chế độ MS: full...
- 11
- 425
- 1
Tài liệu Real-time, on-line monitoring of organic chemical reactions using extractive electrospray ionization tandem mass spectrometry pdf
... real-time monitoring, tandem mass spectrometry (MSn) helps to identify unknown species, validate proposed intermediates and further understand the reaction mechanisms To demonstrate this, an acetylation ... have low proton affinities Rapid Commun Mass Spectrom 2008; 22: 2993–2998 DOI: 10.1002/rcm Monitoring of organic chemical reactions using EESI -MS Figure Mass spectra of the Michael addition reaction ... by the EESI -MS analysis, which is carried out on a quadrupole time-of-flight (Q-TOF) mass spectrometer The relatively simple setup allows this method to be implemented on any type of MS instrument...
- 6
- 611
- 0
Tài liệu Báo cáo khoa học: Comparison of membrane fraction proteomic profiles of normal and cancerous human colorectal tissues with gel-assisted digestion and iTRAQ labeling mass spectrometry pptx
... prior to MS analysis In our method, we decided to analyze the sample directly by RPLC -MS ⁄ MS three times to obtain a confident protein identification result Using the iTRAQ labeling mass spectrometry, ... normal mucosa, and this was confirmed by our iTRAQ labeling MS analysis These results demonstrate that some of the proteins identified by LC -MS ⁄ MS could serve as potential markers in future studies ... Proteins identified by mass spectrometry were classified by subcellular location and molecular function (Fig 3) To better understand the probable roles of the membrane proteomes in terms of their biological...
- 11
- 590
- 0
Tài liệu Báo cáo khoa học: A functional polymorphism of apolipoprotein C1 detected by mass spectrometry docx
... reflectron mode and in a QSTAR o-MALDI mass spectrometer (Applied Biosystems Inc., Bellarica, CA, USA) MS ⁄ MS analysis was conducted with the QSTAR o-MALDI mass spectrometer The TOF region acceleration ... procedures, digested with Glu-C protease, and the peptides subjected to MS The peptide mass fingerprint from MALDI-TOF MS showed m ⁄ z values corresponding to all eight theoretical peptides plus ... Bruce Witthuhn of the Center for Mass Spectrometry and Proteomics at the University of Minnesota (Director GLN) We acknowledge the expert technical assistance of Ms Julia Nguyen and other volunteers...
- 9
- 529
- 0
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
... transitions induced by temperature Cytotoxicity assays MALDI-TOF MS All mass spectra were acquired on a Bruker ULTRAFLEX ` TOF mass spectrometer, at the Servei de Proteomica i ` ` Bioinformatica ... independent experiments For each experiment, mass spectra were acquired from duplicates The accuracy in mass determination obtained for the different species was ± U Mass values given throughout the text ... the enzyme [13] The molecular mass of each purified product, as measured by MALDI-TOF MS, was 11 947.87±2 for (Met1)-ONC (M23L) and 11 838.21±2 for rONC, which conforms well to the expected values:...
- 9
- 704
- 0
Tài liệu Báo cáo khóa học: Determination by electrospray mass spectrometry and 1H-NMR spectroscopy of primary structures of variously fucosylated neutral oligosaccharides based on the iso-lacto-N-octaose core doc
... 220 °C at °CÆmin)1 and to 310 °C at 10 °CÆmin)1 ES -MS Negative-ion ES -MS and CID MS/ MS were carried out on a Micromass (Manchester, UK) Q-Tof mass spectrometer Nitrogen was used as desolvation ... underivatized oligosaccharides by negative-ion electrospray mass spectrometry (ES -MS) with collision-induced dissociation (CID) and MS/ MS scanning with low picomole sensitivity [13,14] Several ... underivatized oligosaccharides by combined MS/ MS of singly and doubly charged molecular ions in negative-ion electrospray mass spectrometry J Am Soc Mass Spectrom 13, 670–679 15 Domon, B & Costello,...
- 15
- 576
- 0
Tài liệu Báo cáo khoa học: Si-face stereospecificity at C5 of coenzyme F420 for F420H2 oxidase from methanogenic Archaea as determined by mass spectrometry ppt
... MALDI-TOF -MS The mass spectra were collected in the reflector negativeion mode For each spectrum, at least 150 single shots were summed The spectra were determined with a Voyager DE RP from PE Biosystems ... relative intensities of the 772 and 773 Da mass peaks FEBS Journal 272 (2005) 5337–5342 ª 2005 FEBS H Seedorf et al Stereochemistry of F420H2 oxidase Fig MALDI-TOF -MS analysis of F420 and F420H2 for ... amounts present in a mixture quantitated using MALDI-TOF -MS; (b) F420H2 auto-oxidizes nonstereospecifically to F420 in the matrix used for MALDITOF -MS; (c) F420 is stereospecifically reduced to with methylenetetrahydromethanopterin...
- 6
- 361
- 1
Tài liệu Báo cáo khoa học: Metabolic flux profiling of Escherichia coli mutants in central carbon metabolism using GC-MS docx
... )70 eV GC- MS raw data were analyzed using the software package MassLab (Fisons), avoiding detector overload and isotope fractionation as described [20] The amino acids analyzed by GC- MS were ... with the lowest mass and mi>0 the abundances of molecules with higher masses These higher masses result from isotope signals that originate from (a) natural abundance in non-C-atoms, (b) natural ... rate, biomass yield on glucose, and specific glucose consumption rate, using a predetermined correlation factor of 0.44 g cellular dry weight (CDW) per D600 unit Sample preparation and GC- MS measurements...
- 12
- 421
- 0
Báo cáo khoa học: Determination of thioxylo-oligosaccharide binding to family 11 xylanases using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and X-ray crystallography pot
... Rmsd bond lengths (A) Rmsd bond angles () Number of all atoms Number of protein atoms Number of waters Number of inhibitor atoms Baverage (A2) Protein main chain atoms Protein side chain atoms ... using soft ionization mass spectrometry Int J Mass Spectrom 216, 127 54 Heck AJR & van den Heuvel RHH (2004) Investigation of intact protein complexes by mass spectrometry Mass Spectrom Rev 23, ... for mass spectrometry of large biomolecules Science 246, 6471 52 Loo JA (2000) Electrospray ionization mass spectrometry: a technology for studying noncovalent macromolecular complexes Int J Mass...
- 17
- 382
- 0
Báo cáo khoa học: Systematic quantification of complex metabolic flux networks using stable isotopes and mass spectrometry pptx
... carbon atoms of OAA/Asp become the first three carbon atoms of aKG/Glu (see Fig 7), while the carbon atoms of acetyl-CoA (AcCoA) become the last two carbon atoms of aKG/Glu The carbon atoms of AcCoA ... Modeling System (GAMS) environment (ÔGAMS Development Corporation, 1998, www.gams.com), a high-level modeling system for mathematical programming problems, and the weighted least-squares mass isotopomer ... two carbon atoms of pyruvate, the mass isotopomer distribution of which is reflected in this of alanine Therefore, the mass isotopomer distribution of Glu can be estimated from the mass isotopomer...
- 18
- 367
- 0
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
... until MS analysis High mass MALDI-TOF MS High -mass MALDI-TOF mass spectra of the intact protein complexes were obtained using a MALDI-TOF mass spectrometer (Voyager DE STR; Applied Biosystems, ... MALDI target (Opti-TOF; Applied Biosystems) MALDI-TOF-TOF MS and MS ⁄ MS spectra were acquired with a MALDI-TOF ⁄ TOFÔ 4800 mass spectrometer (Applied Biosystems) in the positive and reflector mode ... 4.9 software from Applied Biosystems NanoLC-linear ion trap (LTQ)-Orbitrap mass spectrometry Tryptic and chymotryptic peptide digests were analyzed by NanoLC MS ⁄ MS using a HPLC system (Ultimate...
- 12
- 510
- 0
- sắc ký khí ghép khối phổ gc ms gas chromatography mass spectometry
- ms and tandem mass spectrometry ms ms
- gc icp ms inductively coupled plasma mass spectrometry
- expanded newborn screening of inborn errors of metabolism by capillary electrophoresis electrospray ionization mass spectrometry ce esi ms
- desorption ionization time of flight mass spectrometry maldi tof ms
- capillary electrophoresis mass spectrometry ce ms
- electrospray ionization and ion trap mass spectrometry it ms
- electrospray ionization and time of flight mass spectrometry tof ms
- lc ms and hplc tandem mass spectrometryhplc tandem mass spectrometry lc ms ms
- inductively coupled plasma mass spectrometry icp ms
- ms gas chromatography mass spectrometry gc ms liquid chromatography and electrospray ionisation
- chromatography tandem mass spectrometry lc ms ms
- gas chromatography combustion isotope ratio mass spectrometry gc c irms
- chromatography mass spectrometry ht gc ms to the detection of pesticides in rice
- chromatography mass spectrometry gc ms analysis
Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam 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 phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008 chỉ tiêu chất lượng 9 tr 25