scholarly journals Determination of the triple oxygen and carbon isotopic composition of CO 2 from atomic ion fragments formed in the ion source of the 253 Ultra high‐resolution isotope ratio mass spectrometer

2019 ◽  
Vol 33 (17) ◽  
pp. 1363-1380 ◽  
Author(s):  
Getachew A. Adnew ◽  
Magdalena E.G. Hofmann ◽  
Dipayan Paul ◽  
Amzad Laskar ◽  
Jakub Surma ◽  
...  
Keyword(s):  
High Resolution ◽  
Isotopic Composition ◽  
Mass Spectrometer ◽  
Isotope Ratio ◽  
Carbon Isotopic Composition ◽  
Ion Source ◽  
Carbon Isotopic ◽  
Isotope Ratio Mass Spectrometer

scholarly journals Method for the determination of concentration and stable carbon isotope ratios of atmospheric phenols

2013 ◽  
Vol 6 (11) ◽  
pp. 2965-2974 ◽  
Author(s):  
M. Saccon ◽  
R. Busca ◽  
C. Facca ◽  
L. Huang ◽  
S. Irei ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Isotopic Composition ◽  
Isotope Ratio ◽  
Extraction Procedure ◽  
Carbon Isotopic Composition ◽  
Stable Carbon ◽  
Concentration Measurements ◽  
Isotope Ratio Measurements

Abstract. A method for the determination of the stable carbon isotopic composition of atmospheric nitrophenols in the gas and particulate phases is presented. It has been proposed to use the combination of concentration and isotope ratio measurements of precursor and product to test the applicability of results of laboratory studies to the atmosphere. Nitrophenols are suspected to be secondary products formed specifically from the photooxidation of volatile organic compounds. XAD-4TM resin was used as an adsorbent on quartz filters to sample ambient phenols using conventional high volume air samplers at York University in Toronto, Canada. Filters were extracted in acetonitrile, with a HPLC (high-performance liquid chromatography) clean-up step and a solid phase extraction step prior to derivatization with BSTFA (bis(trimethylsilyl) trifluoroacetamide). Concentration measurements were done with gas chromatography–mass spectrometry and gas chromatography–isotope ratio mass spectrometry was used for isotope ratio analysis. The technique presented allows for atmospheric compound-specific isotopic composition measurements for five semi-volatile phenols with an estimated accuracy of 0.3–0.5‰ at atmospheric concentrations exceeding 0.1 ng m−3 while the detection limits for concentration measurements are in the pg m−3 range. Isotopic fractionation throughout the entire extraction procedure and analysis was proven to be below the precision of the isotope ratio measurements. The method was tested by conducting ambient measurements from September to December 2011.

Determination of the concentration of nitrogenous bio-organic compounds using an isotope ratio mass spectrometer operating in continuous flow mode

2011 ◽  
Vol 401 (4) ◽  
pp. 1263-1271 ◽  
Author(s):  
Illa Tea ◽  
Katarzyna Kosieradzka ◽  
Ingrid Antheaume ◽  
Emmanuel Gentil ◽  
Richard J. Robins
Keyword(s):  
Organic Compounds ◽  
Mass Spectrometer ◽  
Continuous Flow ◽  
Isotope Ratio ◽  
Flow Mode ◽  
Isotope Ratio Mass Spectrometer
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