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Characterisation of the semi-volatile component of Dissolved Organic Matter by Thermal Desorption – Proton Transfer Reaction – Mass Spectrometry

Materić, Dušan; Peacock, Michael; Kent, Matthew; Cook, Sarah; Gauci, Vincent; Rockman, Thomas and Holzinger, Rupert (2017). Characterisation of the semi-volatile component of Dissolved Organic Matter by Thermal Desorption – Proton Transfer Reaction – Mass Spectrometry. Scientific reports

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DOI (Digital Object Identifier) Link: https://doi.org/10.1038/s41598-017-16256-x
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Abstract

Proton Transfer Reaction – Mass Spectrometry (PTR-MS) is a sensitive, soft ionisation method suitable for qualitative and quantitative analysis of volatile and semi-volatile organic vapours. PTR-MS is used for various environmental applications including monitoring of volatile organic compounds (VOCs) emitted from natural and anthropogenic sources, chemical composition measurements of aerosols, etc. Here we apply thermal desorption PTR-MS for the frst time to characterise the chemical composition of dissolved organic matter (DOM). We developed a clean, low-pressure evaporation/sublimation system to remove water from samples and coupled it to a custom-made thermal desorption unit to introduce the samples to the PTR-MS. Using this system, we analysed waters from intact and degraded peat swamp forest of Kalimantan, Indonesian Borneo, and an oil palm plantation and natural forest in Sarawak, Malaysian Borneo. We detected more than 200 organic ions from these samples and principal component analysis allowed clear separation of the diferent sample origins based on the composition of organic compounds. The method is sensitive, reproducible, and provides a new and comparatively cheap tool for a rapid characterisation of water and soil DOM.

Item Type: Journal Item
Copyright Holders: The Authors
ISSN: 2045-2322
Project Funding Details:
Funded Project NameProject IDFunding Body
Axa Research FundNot SetNot Set
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM)
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Research Group: OpenSpace Research Centre (OSRC)
International Development & Inclusive Innovation
Item ID: 52387
Depositing User: Vincent Gauci
Date Deposited: 22 Nov 2017 14:17
Last Modified: 02 May 2019 11:33
URI: http://oro.open.ac.uk/id/eprint/52387
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