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Bridging microbial diversity and chemodiversity of dissolved organic matter to better constrain processes in biogeochemical cycles
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Standard method development for dissolved organic matter characterization by high resolution mass spectrometry
P-M4-06
Quan Shi* , China University of Petroleum - Beijing
Chen He, China University of Petroleum - Beijing
Presenter Email: sq@cup.edu.cn |
| Dissolved organic matter (DOM) is ubiquitous in sea water, as well as other aquatic systems. A deep understanding on chemical composition of DOM is necessary for the studies relevant to environmental chemistry, however it is a big challenge for analytical chemists to characterize the molecular composition and structure of DOM. Recently, high resolution mass spectrometries, such as Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has been widely used for DOM analysis. It has been known that the FT-ICR MS generally has very poor repeatability / reproducibility for DOM and cannot used for quantitative analysis. We developed a semi-quantitative analysis method for the molecular characterization of DOM. The instrument was tuned and optimized with a standard DOM sample, namely SRNOM, to obtain a repeatable mass spectrum before sample analysis. Deuterated inner standard was used for the semi-quantitative analysis. The method was evaluated in various laboratories with different types of FT-ICR MS. |
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