[PDF] Top 20 Development and characterization of a High-Temperature Proton-Transfer-Reaction Mass Spectrometer (HT-PTR-MS)
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Development and characterization of a High-Temperature Proton-Transfer-Reaction Mass Spectrometer (HT-PTR-MS)
... the high E/N-mode when the primary ion signal was significantly higher (see ...the PTR-MS user ...compare PTR-MS in- struments because it does not reflect differences in primary ion ... See full document
8
Identification, method development, validation, and characterization of Aza sugars by an ion-chromatography, high-resolution mass spectrometer, and LC-MS/MS
... Metrohm ion chromatography instrument with MagIC Net 3.2 software was used for the total study. The ion chromatography system was bought from Metrohm, Herisau, Switzerland. The ion chromatog- raphy system is equipped ... See full document
16
Calibration and intercomparison of acetic acid measurements using proton-transfer-reaction mass spectrometry (PTR-MS)
... with temperature, and is also dependent on the field strength of the drift tube (Mackay et ...very high field strengths (≥ 200 Td, 1 Td = 10 −17 V cm 2 ), another frag- ment appears at m/z 15, the methyl ... See full document
12
An extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) for online measurement of atmospheric aerosol particles
... aerosol mass spectrometer (AMS) utilizes a high vaporiza- tion temperature (600 ◦ C) and electron ionization (EI, 70 eV) to remain quantitative but at the cost of extensive thermal ... See full document
20
Sensitive detection of n-alkanes using a mixed ionization mode proton-transfer-reaction mass spectrometer
... the reaction mechanisms of n-alkanes in the PTR-MS and to optimize conditions for their detec- tion, a constant flow of 40 mL min −1 (MKS flow con- troller) of n-hexane (1340 ppbv), n-decane (445 ... See full document
15
MS/MS studies for the selective detection of isomeric biogenic VOCs using a Townsend Discharge Triple Quadrupole Tandem MS and a PTR-Linear Ion Trap MS
... Proton Transfer Reaction Mass Spectrometry (PTR-MS) is a powerful method for fast and sensitive determination of atmospheric VOCs (Lindinger et ...The PTR-MS ... See full document
10
Observations of VOC emissions and photochemical products over US oil- and gas-producing regions using high-resolution H 3O CIMS (PTR-ToF-MS)
... recent development of PTR-MS instruments that use high- resolution time-of-flight mass spectrometers (PTR-ToF-MSs) has greatly expanded the number of measurable species, enhanced ... See full document
28
Segmented flow coil equilibrator coupled to a proton-transfer-reaction mass spectrometer for measurements of a broad range of volatile organic compounds in seawater
... to PTR-MS for measurement of methanol, ace- tone (2-propanone), acetaldehyde (ethanal), dimethyl sulfide (DMS), isoprene (2-methyl-1,3-butadiene), benzene, and toluene (methyl ...a high degree of ... See full document
16
Development of a combined heart-cut and comprehensive two-dimensional gas chromatography system to extend the carbon range of volatile organic compounds analysis in a single instrument
... air mass direction was observed each day associated with the development of a sea breeze, which influenced the diurnal profiles of species measured at the Bachok ...A ... See full document
15
Detection of formaldehyde emissions from an industrial zone in the Yangtze River Delta region of China using a proton transfer reaction ion-drift chemical ionization mass spectrometer
... relatively high background signals were ob- served in ...quadrupole mass filter can normally achieve unit mass separation, m/z 31 sig- nals were also slightly interfered by the tail from the rela- ... See full document
16
Measurement of alkyl and multifunctional organic nitrates by proton-transfer-reaction mass spectrometry
... The PTR-MS sampling line was designed in order to as- sure the highest transfer efficiency of the ...the transfer of low-level polar organic compounds (Smith, ...The PTR-MS inlet ... See full document
19
Multicenter Study Evaluating the Vitek MS System for Identification of Medically Important Yeasts
... Vitek MS MALDI-TOF mass spectrometer in linear posi- tive-ion mode, across the mass-to-charge ratio range of 2,000 to 20,000 ...Vitek MS acqui- sition station to the Vitek MS ... See full document
6
Direct Synthesis of Acetic Acid from Carbon Dioxide and Methane
... the temperature of the chamber had to be recorded by hand and be adjusted manually with no control over ramp ...120-28 mass flow controller was used to control the inlet gas flow ...the mass flow ... See full document
437
Top-down venomics of the East African green mamba, Dendroaspis angusticeps, and the black mamba, Dendroaspis polylepis, highlight the complexity of their toxin arsenals.
... i) high resolution mass measurement of the venom proteins, a piece of information without which it is difficult to ensure a complete insight on a venom's complexity, and ii) locus-resolved toxin ... See full document
17
An electrospray chemical ionization source for real-time measurement of atmospheric organic and inorganic vapors
... the MS, and resulting in a sample flow of ∼ 270 sccm (standard cubic centimeters per minute) into the ...the mass spectrometer entrance capillary is electrically isolated from the IMR by a ∼ 1 mm ... See full document
17
Ambient measurements of aromatic and oxidized VOCs by PTR-MS and GC-MS: intercomparison between four instruments in a boreal forest in Finland
... Abstract. Proton transfer reaction mass spectrometry (PTR- MS) and gas chromatography mass spectrometry GC-MS) are commonly used methods for automated in situ ... See full document
21
Metabolic alterations induced by attenuated Zika virus in glioblastoma cells
... from mass spec- trometric analysis were submitted to a PLS-DA, which pointed differences between metabolite composition in CT cells versus attenuated ZIKV treated cells (Additional file 1: Figure ... See full document
9
Methanolysis of Coconut Oil: The Kinetic of Heterogeneous Reaction
... In this reaction, a catalyst is needed in order to improves the reaction rate. Conventionally, alkaline metal alkoxides are the most effective methanolysis catalyst compared to the acidic catalyst. Sodium ... See full document
5
InGaP electron spectrometer for high temperature environments
... energies greater than 60 keV is small due to energy losses along the electrons’ trajectories towards the detector. By combining the spectrum shown in Fig. 6 with the percentage of the electron energy absorbed in the ... See full document
11
Field measurements of methylglyoxal using proton transfer reaction time-of-flight mass spectrometry and comparison to the DNPH–HPLC–UV method
... the PTR-ToF-MS and the liquid stan- dard for the ...the PTR-ToF-MS calibration, varying the concentration of MGLY in the range ...the PTR-ToF-MS ...the PTR-ToF-MS ... See full document
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