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| Titel |
Method for determination of stable carbon isotope ratio of methylnitrophenols in atmospheric particulate matter |
| VerfasserIn |
S. Moukhtar, M. Saccon, A. Kornilova, S. Irei, L. Huang, J. Rudolph |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 11 ; Nr. 4, no. 11 (2011-11-16), S.2453-2464 |
| Datensatznummer |
250002135
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| Publikation (Nr.) |
 copernicus.org/amt-4-2453-2011.pdf |
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| Zusammenfassung |
A technique for the measurement of the stable isotope
ratio of methylnitrophenols in atmospheric particulate matter is presented.
Atmospheric samples from rural and suburban areas were collected for
evaluation of the procedure. Particulate matter was collected on quartz
fibre filters using dichotomous high volume air samplers. Methylnitrophenols
were extracted from the filters using acetonitrile. The sample was then
purified using a combination of high-performance liquid chromatography and
solid phase extraction. The final solution was then divided into two
aliquots. To one aliquot, a derivatising agent,
Bis(trimethylsilyl)trifluoroacetamide, was added for Gas Chromatography-Mass
Spectrometry analysis. The second half of the sample was stored in a
refrigerator. For samples with concentrations exceeding 1 ng μl−1, the
second half of the sample was used for measurement of stable carbon isotope
ratios by Gas Chromatography-Isotope Ratio Mass Spectrometry.
The procedure described in this paper provides a method for the analysis of
methylnitrophenols in atmospheric particulate matter at concentrations as
low as 0.3 pg m−3 and for stable isotope ratios with an accuracy of
better than ±0.5‰ for concentrations exceeding 100 pg m−3.
In all atmospheric particulate matter samples analysed,
2-methyl-4-nitrophenol was found to be the most abundant methylnitrophenol,
with concentrations ranging from the low pg m−3 range in rural areas to
more than 200 pg m−3 in some samples from a suburban location. |
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