[PDF] Top 20 A high-resolution mass spectrometer to measure atmospheric ion composition
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A high-resolution mass spectrometer to measure atmospheric ion composition
... ammonia were separately added to the sample. The siloxanes are contaminants from conductive tubing and are very easily ionized with a radioactive charger. The width to mass relation is depicted in ... See full document
38
J. Braz. Chem. Soc. vol.27 número3
... The high resolution mass spectrometry (HRMS) using atmospheric pressure chemical ionization (HRAPCIMS) was performed on a liquid chromatography-mass spectrometry ion trap and ... See full document
5
Bisulfate – cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity (< 100 ppqV) detection of atmospheric dimethyl amine: proof-of-concept and first ambient data from boreal forest
... topole ion guide are subsequently detected by a quadrupole mass spectrometer (Hanson et ...8 to 41 pptV for a series of other small ...elemental composition of detected ion due ... See full document
11
A new technique for the direct detection of HO<sub>2</sub> radicals using bromide chemical ionization mass spectrometry (Br-CIMS): initial characterization
... of ion optics and speci- ated by the time-of-flight ...nominal mass-to-charge ratios, m/z 112 and m/z 114 cor- responding to the 79 Br and 81 Br isotopes, ...fractional ... See full document
11
Elemental ratio measurements of organic compounds using aerosol mass spectrometry: characterization, improved calibration, and implications
... electrospray ion- ization coupled to ultra-high-resolution mass spectrome- try with (ESI) (Nguyen and Schug, 2008; Altieri et ...ionization mass spectrometry (CIMS) with aerosol ... See full document
20
High-resolution measurements of atmospheric molecular hydrogen and its isotopic composition at the West African coast of Mauritania
... air mass back trajectories revealed clear differences between the two cruises regarding the origin of wind: in 2008 wind came exclusively from the oceanic sector for at least three to four days before ... See full document
13
An aircraft-borne chemical ionization – ion trap mass spectrometer (CI-ITMS) for fast PAN and PPN measurements
... ionization ion trap mass spectrometer instrument (CI-ITMS) has been developed for tropospheric and stratospheric fast in-situ measurements of PAN (peroxyacetyl nitrate) and PPN (peroxypropionyl ni- ... See full document
16
High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core
... leads to resolving more variability (wavelength of a few tens of s or more) in the gas composition from the trans- fer lines, both in sample mode and in loop mode ...gas composition in the ice, as ... See full document
40
Atmospheric aerosol compositions and sources at two national background sites in northern and southern China
... study to char- acterize submicron biogenic organic particles in the Ama- zon ...aerosol composition using an Aerosol Chemical Speciation Moni- tor (ACSM) at a national background monitoring station in the ... See full document
15
A switchable reagent ion high resolution time-of-flight chemical ionization mass spectrometer for real-time measurement of gas phase oxidized species: characterization from the 2013 Southern Oxidant and Aerosol Study
... calibrations for as many of these compounds as possible will provide quantitative, spe- ciated data to modelers; it should be acknowledged that knowing the temporal behavior without quantification is also of ... See full document
46
J. Braz. Chem. Soc. vol.23 número1
... positive ion mode and high resolution and high accuracy tandem mass spectrometry performed in a hybrid quadrupole time-of-flight mass spectrometer were used to ... See full document
8
Chemical composition, sources, and processes of urban aerosols during summertime in Northwest China: insights from High Resolution Aerosol Mass Spectrometry
... able to reconstruct the total OA mass and temporal profiles very well, and can be very well justified, for example, the mass spectra of the four individual factors agree the best with the reference ... See full document
56
A new method to measure Bowen ratios using high-resolution vertical dry and wet bulb temperature profiles
... Evaporation is – after rainfall – the most important term of the hydrological water balance (Gleick, 1993). Evapora- tion is also a major term of the land surface energy balance, i.e. the latent heat flux. Knowledge on ... See full document
12
J. Braz. Chem. Soc. vol.22 número3
... done to verify ion suppression and matrix ...suppress ion signals because of ionization competition in the source housing decreasing target analyte signals, but this was not observed in the retention ... See full document
8
Identification and quantification of organic aerosol from cooking and other sources in Barcelona using aerosol mass spectrometer data
... normalized to total organics against m/z 57 normalized to total organics helps identify COA in ambient datasets: The data points fall into a V-shape, with HOA-influenced data aligned to the lower ... See full document
38
Loading-dependent elemental composition of α-pinene SOA particles
... (A) High-resolution mass spectra presented at unit mass ...the high- resolution mass spectra into the relative contributions by each family (DeCarlo et ...the ... See full document
31
XCO<sub>2</sub>-measurements with a tabletop FTS using solar absorption spectroscopy
... After the radiation has passed the interferometer, it is blocked by an aperture (which forms the aperture stop of the optical system) with a diameter of 3 mm. We inserted this aperture for controlling optical aberrations ... See full document
34
A new method to measure bowen ratios using high resolution vertical dry and wet bulb temperature profiles
... experimental set up. For the data processing the average of both sensors is used. The soil heat flux was measured using two soil heat flux plates (HFT-S, REBS, Seat- tle, WA) which were placed at a depth of 80 mm below ... See full document
36
Corrigendum to "Airborne hydrogen cyanide measurements using a chemical ionisation mass spectrometer for the plume identification of biomass burning forest fires" published in Atmos. Chem. Phys., 13, 9217–9232, 2013
... In the manuscript “Airborne hydrogen cyanide measure- ments using a chemical ionisation mass spectrometer for the plume identification of biomass burning forest fires”, four au- thors we[r] ... See full document
1
First results from the plasma composition spectrometer PROMICS-3 in the Interball project
... different ion species; from top to bottom protons, alpha particles, He `, and O` in the energy range 5—70 ...not high, the maximum being only about 30 counts per readout, which corresponds to ... See full document
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