Electrospray mass spectrometry to study lake water DOM and effects of microbial degradation
2005 (English)In: International Journal of Environmental Analytical Chemistry, ISSN 0306-7319, Vol. 85, no 1, 15-27 p.Article in journal (Refereed) Published
Qualitative analysis of lake water dissolved organic matter (DOM) was carried out using electrospray ionization mass spectrometry (ESI MS) without prior clean-up or chromatography, showing the potential of ESI MS as a rapid method to analyse qualitative differences between DOM with different environmental properties. Spectra were evaluated in terms of the relative ion abundance in certain mass to charge ranges (m/z(range)), and the mass-to-charge average (m/z(average)). Lake water DOM from two different sources was used. In addition, DOM from both sources that had been subjected to microbial degradation under different oxygen regimes was analysed. ESI MS results were compared with those of UV absorbance and pollutant binding capacity (pyrene and atrazine). The results from all methods indicated qualitative differences between the DOM from different lakes, but only minor qualitative changes when comparing oxic and anoxic degradation. To detect those small differences the m/z(range) proved to be the more sensitive evaluation method, compared to the m/z(average).
Place, publisher, year, edition, pages
2005. Vol. 85, no 1, 15-27 p.
IdentifiersURN: urn:nbn:se:liu:diva-28238DOI: 10.1080/0306731042000303198ISBN: 0306-7319OAI: oai:DiVA.org:liu-28238DiVA: diva2:248998