Chemical ionization mass spectrometer (CIMS)
A chemical ionization mass spectrometer for continuous underway shipboard analysis of dimethylsulfide in near-surface seawater
... A chemical ionization mass spectrometer 545 5 Discussion This study has demonstrated that the mini-CIMS instrument has the sensitivity, selectivity, and time response required for underway ...
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A Chemical Ionization Mass Spectrometer for ambient measurements of Ammonia
... D. R. Benson et al.: A Chemical Ionization Mass Spectrometer for ambient measurements 1087 von Bobrutzki, K., Braban, C. F., Famulari, D., Jones, S. K., Black- all, T., Smith, T. E. L., Blom, ...
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Airborne observations of formic acid using a chemical ionization mass spectrometer
... sodium bicarbonate. After an effective zero acid air flow for background determination, a known amount of formic acid from a pressurised gas cylinder is added to this scrubbed air flow until a plateau in formic acid ...
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Development, calibration and deployment of an airborne chemical ionization mass spectrometer for trace gas measurements
... and chemical processes in the atmosphere, high quality measurements of ultra trace gases are ...quadrupole mass analyzers, which in fact become rather slow if they are aiming for simultaneous measurements ...
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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
... We showed that the low transmission of H 3 O + ions as a result of low-mass cutoff of RF-only quadrupoles and sec- ondary ion chemistry inside the quadrupole ion guides lead to the unusual humidity dependence of ...
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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
... to the chemicals and their fragments originated from various chemistry experiments in the building. In theory, the PTR-ID-CIMS worked essentially in the same way as an Ionicon PTR-MS in VOC detections. How- ever, the ...
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An aircraft-borne chemical ionization – ion trap mass spectrometer (CI-ITMS) for fast PAN and PPN measurements
... However, the accuracy of CIMS-systems might be influ- enced by various parameters. The major uncertainty is due to the uncertainty of the rate constants of the ion-molecule reactions used. In particular ambient water ...
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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
... size-resolved chemical analysis of nucleation mode aerosol particles (size range from ∼ 10 to ∼ 30 nm) is ...sampled mass is evaporated in a clean carrier gas and ana- lyzed by a chemical ...
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Multi-scheme chemical ionization inlet (MION) for fast switching of reagent ion chemistry in atmospheric pressure chemical ionization mass spectrometry (CIMS) applications
... novel chemical ionization inlet named the Multi-scheme chemical IONization inlet (MION), Karsa ...time-of-flight mass spectrometer (APi-ToF- MS, Tofwerk ...− ionization, ...
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An extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) for online measurement of atmospheric aerosol particles
... Further, for aerosol of unknown composition the possibility of multiple isomers (potentially having significantly different RRF x ) must be considered. The SOA species shown in Fig. 4 are comprised of many individual ...
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The sensitivity of benzene cluster cation chemical ionization mass spectrometry to select biogenic terpenes
... 2.2 Chemical ionization mass spectrometer The detailed description of the CI-ToFMS (Tofwerk AG, Switzerland, and Aerodyne Research Inc., USA) and its per- formance are discussed in Bertram et ...
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Real-time measurements of gas-phase organic acids using SF6− chemical ionization mass spectrometry
... tractable mass spec- tra obtained by the SF − 6 CIMS method coupled with reason- able limits of detection and the high correlations observed between the individual organic acids demonstrated the po- tential of ...
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Low-pressure gas chromatography with chemical ionization mass spectrometry for quantification of multifunctional organic compounds in the atmosphere
... time-of-flight mass spectrometer, (B) Teflon-coated glass inlet, (C) CIMS sampling port, (D) GC– CIMS sampling port, (E) hexapole ion guide, (F) Teflon-coated glass flow tube, (G) critical orifice, (H) ...
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A field-deployable, chemical ionization time-of-flight mass spectrometer
... the mass spectrum, called “peak ...exact mass analysis and/or peak integration, whereas the peak data contains the result of the peak inte- gration, based on the mass calibration established at the ...
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Chemical ionization quadrupole mass spectrometer with an electrical discharge ion source for atmospheric trace gas measurement
... a chemical ionization quadrupole mass spectrometer (CI-QMS) with a radio-frequency (RF) dis- charge ion source through N 2 /CH 3 I as a source of pri- mary ...present ionization schemes ...
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Applicability of a two-step laser desorption-ionization aerosol time-of-flight mass spectrometer for determination of chemical composition of ultrafine aerosol particles
... or chemical groups, in the mixed mass spectra of ambient aerosol ...aerosol mass spectrometry is highly challenging, but succeeded in this study very ...
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Gas Chromatography / Chemical Ionization Mass Spectrometry of Polyethylene Glycol Monoalkyl Ethers
... , MC 3 H 5 + ) and the base peaks as the MH + ions for all the PEGMAE he studied. In our experiment, there were no adduct ions and the base peak are the H(OC 2 H 4 ) n OH 2 + ions (n = 1 - 3). Only tetraethylene glycol ...
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Performance of a corona ion source for measurement of sulfuric acid by chemical ionization mass spectrometry
... The observation that the correspondence between the corona and the americium ion source is nearly perfect is not necessarily expected given the fact that the ions from the corona needle are generated only by a point ...
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Determination of phytosterols in Oryza sativa L cultivars by liquid chromatography atmospheric chemical ionization time of flight mass spectrometer (LC APCI TOF MS) coupled with a modified QuEChERS method
... Received 3 September 2012; revised 15 October 2012; accepted 28 October 2012 ABSTRACT Development of analytical methods for the de- termination of phytosterols in whole grains is one of growing interests due to their ...
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Development of electrospray ionization of biomolecules on a magnetic sector mass spectrometer
... Four-sector mass spectrometer during 1996 - 1997, used a simple way to solve the problem: a glass capillary with metal coatings at the entrance and exit ends to withstand the high potential ...
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