 |
| Titel |
Method for the determination of concentration and stable carbon isotope ratios of atmospheric phenols |
| VerfasserIn |
M. Saccon, R. Busca, C. Facca, L. Huang, S. Irei, A. Kornilova, D. Lane, J. Rudolph |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 11 ; Nr. 6, no. 11 (2013-11-05), S.2965-2974 |
| Datensatznummer |
250085101
|
| Publikation (Nr.) |
 copernicus.org/amt-6-2965-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
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. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|