chemical ionization mass spectrometer
A chemical ionization mass spectrometer for continuous underway shipboard analysis of dimethylsulfide in near-surface seawater
... ical ionization mass spectrometer (“mini-CIMS”) has been developed for continuous underway shipboard measurements of dimethylsulfide (DMS) in ...declustered, mass filtered via quadrupole ...
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A Chemical Ionization Mass Spectrometer for ambient measurements of Ammonia
... surements were performed at an urban site 2 m above the ground level. b The Georgia Tech-CIMS was also used for the ANARChE and intercomparison with the early version of NOAA-CIMS was made. c This upgraded NOAA-CIMS for ...
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Airborne observations of formic acid using a chemical ionization mass spectrometer
... that chemical ionization mass spectrometry can be used to selec- tively detect gas-phase organic acids with a limit of detection below ...ical ionization mass spectrometer (CIMS) ...
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A high-resolution time-of-flight chemical ionization mass spectrometer utilizing hydronium ions (H 3O ToF-CIMS) for measurements of volatile organic compounds in the atmosphere
... of mass spectra, the RF amplitudes of the SSQ and BSQ were set to 50 and 350 V, ...medium mass coil) and BSQ (4.5 MHz, low-mass coil) were set according to manufacturer’s ...
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A new technique for the direct detection of HO 2radicals using bromide chemical ionization mass spectrometry (Br-CIMS): initial characterization
... Figure 1. Schematic diagram of the high-resolution time-of-flight chemical ionization mass spectrometer (HR-ToF-CIMS). Sample air enters the ion–molecule reaction region through a 0.5 mm ...
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Constraining Anthropogenic and Biogenic Emissions using Chemical Ionization Mass Spectrometry
... a chemical agent, separation of compounds, and detection by HPLC, GC-MS, or GC-FID (Lee et ...(tandem) chemical ionization mass spectrometry en- able online, fast, in situ measurements with no ...
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Performance of a corona ion source for measurement of sulfuric acid by chemical ionization mass spectrometry
... The corona ion source has been developed for a chemical ionization mass spectrometer from THS Instruments (THS Instruments LLC, USA) for the detection of sulfuric acid. The measurement relies ...
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Size-resolved online chemical analysis of nanoaerosol particles: a thermal desorption differential mobility analyzer coupled to a chemical ionization time-of-flight mass spectrometer
... nanoaerosol mass spectrometer (NAMS) (Wang et ...particle mass spectrometer for small particles and uses a continuous ...desorption chemical ionization mass ...
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5512.pdf
... acetate chemical ionization mass spectrometer (CIMS) was characterized and utilized to measure SOA yields from two proposed isoprene-derived epoxides, isoprene epoxydiol (IEPOX) and ...
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An aircraft-borne chemical ionization – ion trap mass spectrometer (CI-ITMS) for fast PAN and PPN measurements
... ion chemical behaviour within the mea- surement uncertainty of most MS systems, and provides cali- bration throughout the whole flight, because it does not inter- fere with the product ion of the measured ...
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New Particle Formation in the Atmosphere: From Molecular Clusters to Global Climate
... fundamental chemical mechanisms leading to nucleation and growth of ...the chemical species contri- buting to nucleation and growth of nanoparticles have yet to be unambiguously ...of chemical ...
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An electrospray chemical ionization source for real-time measurement of atmospheric organic and inorganic vapors
... The ESCI source presented here is in its early stages of de- velopment. Continued characterization of the sensitivity and selectivity of different reagent ions, especially their depen- dence on humidity, is needed. ...
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A field-deployable, chemical ionization time-of-flight mass spectrometer
... digitized mass spectra are converted to units of ions s −1 by normalization, using a value repre- senting the TOFMS response to single-ion detection ...the mass spectrum, called “peak ...exact mass ...
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Large daytime signals of N2O5 and NO 3inferred at 62 amu in a TD-CIMS: chemical interference or a real atmospheric phenomenon?
... selective ionization process resulting from the reaction be- tween a reagent ion and the target compounds, with the gen- erated ions detected by a mass ...
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Chemical ionization quadrupole mass spectrometer with an electrical discharge ion source for atmospheric trace gas measurement
... a mass-to- charge ratio (m/z) of ...time-of-flight mass spectrome- ters (I-CIMS-TOF), which have a high mass resolution and exploit the iodine mass defect for the identification of the el- ...
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Measurement of nonvolatile particle number size distribution
... This experimental approach was applied in a winter field campaign in Athens and provided a direct measurement of number concentration and size distribution for particles emitted from major pollution sources. During ...
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Petroleomic depth profiling of Staten Island salt marsh soil : 2ω detection FTICR MS offers a new solution for the analysis of environmental contaminants
... Atmospheric pressure chemical ionization Fourier transform ion cyclotron resonance mass.. spectrometry for complex thiophenic mixture analysis.[r] ...
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Identification of N Methyl Bis(2 (Alkyloxy Alkylphosphoryloxy)Ethyl) Amines by LC HRMS/MS
... MS analyses were performed using an Agilent 6520 quadruple-time-of-flight mass spectrometer fitted with an electrospray (ESI) interface, operated in positive ESI mode. Capillary voltage was set at 3.5 kV, ...
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Identification of Burkholderia pseudomallei by Use of the Vitek Mass Spectrometer
... After completion of the evaluation of B. pseudomallei identification by the newly created SuperSpectrum, a secondary analysis of spectra was performed in order to compare isolates associated with CNS and non-CNS ...
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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 ...
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