A computerized mass spectrometer and flowmeter system for respiratory gas measurements

1983 ◽  
Vol 11 (2) ◽  
pp. 83-99 ◽  
Author(s):  
Ingvar E. Sodal ◽  
George D. Swanson ◽  
Alexander J. Micco ◽  
Fred Sprague ◽  
Donald G. Ellis
Keyword(s):  
Mass Spectrometer ◽  
Gas Measurements ◽  
Flowmeter System

scholarly journals The airborne mass spectrometer AIMS – Part 2: Measurements of trace gases with stratospheric or tropospheric origin in the UTLS

2015 ◽  
Vol 8 (12) ◽  
pp. 13567-13607 ◽  
Author(s):  
T. Jurkat ◽  
S. Kaufmann ◽  
C. Voigt ◽  
D. Schäuble ◽  
P. Jeßberger ◽  
...  
Keyword(s):  
Nitrogen Oxide ◽  
Mass Spectrometer ◽  
Chemical Ionization ◽  
Trace Gases ◽  
Measurement Techniques ◽  
Ion Source ◽  
Trace Gas ◽  
Ionization Mass ◽  
Custom Made ◽  
Gas Measurements

Abstract. Understanding the role of climate-sensitive trace gas variabilities in the upper troposphere and lower stratosphere region (UTLS) and their impact on its radiative budget requires accurate measurements. The composition of the UTLS is governed by transport and chemistry of stratospheric and tropospheric constituents, such as chlorine, nitrogen oxide and sulphur components. The Airborne chemical Ionization Mass Spectrometer AIMS has been developed to accurately measure a set of these constituents on aircraft by means of chemical ionization. Here we present a setup using chemical ionization with SF5− reagent ions for the simultaneous measurement of trace gas concentrations in the pptv to ppmv (10−12 to 10−6 mol mol−1) range of HCl, HNO3 and SO2 with in-flight and online calibration called AIMS-TG. Part 1 of this paper (Kaufmann et al., 2015) reports on the UTLS water vapour measurements with the AIMS-H2O configuration. The instrument can be flexibly switched between two configurations depending on the scientific objective of the mission. For AIMS-TG, a custom-made gas discharge ion source has been developed generating a characteristic ionization scheme. HNO3 and HCl are routinely calibrated in-flight using permeation devices, SO2 is permanently calibrated during flight adding an isotopically labelled 34SO2 standard. In addition, we report on trace gas measurements of HONO which is sensitive to the reaction with SF5−. The detection limit for the various trace gases is in the low ten pptv range at a 1 s time resolution with an overall uncertainty of the measurement in the order of 20 %. AIMS has been integrated and successfully operated on the DLR research aircraft Falcon and HALO. Exemplarily, measurements conducted during the TACTS/ESMVal mission with HALO in 2012 are presented, focusing on a classification of tropospheric and stratospheric influences in the UTLS region. Comparison of AIMS measurements with other measurement techniques allow to draw a comprehensive picture of the sulphur, chlorine and reactive nitrogen oxide budget in the UTLS. The combination of the trace gases measured with AIMS exhibit the potential to gain a better understanding of the trace gas origin and variability at and near the tropopause.

Transcutaneous Blood Gas Measurements Using a Mass Spectrometer

1978 ◽  
Vol 22 ◽  
pp. 128-130 ◽  
Author(s):  
M. B. McIlroy ◽  
G. Simbruner ◽  
Y. Sonoda
Keyword(s):  
Mass Spectrometer ◽  
Blood Gas ◽  
Gas Measurements

scholarly journals Online 13C and 14C Gas Measurements by EA-IRMS–AMS at ETH Zürich

Radiocarbon ◽  
2016 ◽  
Vol 59 (3) ◽  
pp. 893-903 ◽  
Author(s):  
Cameron P McIntyre ◽  
Lukas Wacker ◽  
Negar Haghipour ◽  
Thomas M Blattmann ◽  
Simon Fahrni ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Global Carbon Cycle ◽  
Ion Source ◽  
Data Sets ◽  
Accelerator Mass Spectrometer ◽  
Mass Spectrometer System ◽  
Gas Measurements ◽  
Rich Data ◽  
Spectrometer System ◽  
Global Carbon

AbstractStudies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13C and 14C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a stable isotope mass spectrometer and an accelerator mass spectrometer system fitted with a gas ion source. We first tested the system with standard materials and then reanalyzed a sediment core from the Bay of Bengal that had been analyzed for 14C by conventional methods. The system was able to produce %C, 13C, and 14C data that were accurate and precise, and suitable for the purposes of our biogeochemistry group. The system was compact and convenient and is appropriate for use in a range of fields of research.

Sign in / Sign up

Export Citation Format

Share Document