Quantifying tropical peatland dissolved organic carbon (DOC) using UV-visible spectroscopy.
journal contributionposted on 2018-03-28, 09:22 authored by Sarah Cook, Mike Peacock, Chris D. Evans, Susan E. Page, Mick J. Whelan, Vincent Gauci, Lip Khoon Kho
UV-visible spectroscopy has been shown to be a useful technique for determining dissolved organic carbon (DOC) concentrations. However, at present we are unaware of any studies in the literature that have investigated the suitability of this approach for tropical DOC water samples from any tropical peatlands, although some work has been performed in other tropical environments. We used water samples from two oil palm estates in Sarawak, Malaysia to: i) investigate the suitability of both single and two-wavelength proxies for tropical DOC determination; ii) develop a calibration dataset and set of parameters to calculate DOC concentrations indirectly; iii) provide tropical researchers with guidance on the best spectrophotometric approaches to use in future analyses of DOC. Both single and two-wavelength model approaches performed well with no one model significantly outperforming the other. The predictive ability of the models suggests that UV-visible spectroscopy is both a viable and low cost method for rapidly analyzing DOC in water samples immediately post-collection, which can be important when working at remote field sites with access to only basic laboratory facilities.
We thank the Malaysian Oil Palm Board (grant: R010913000); the University of Aberdeen, the University of St. Andrews, and Sarawak Oil Palms Berhad; and the Natural Environment Research Council (NERC) (grant: X402NE53) for financial support. V.G and S.C are grateful for support from the AXA Research Fund. S.E.P and M.J.W are grateful to the University of Leicester for study leave.
CitationWater Research, 2017, 115, pp. 229-235
Author affiliation/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/School of Geography, Geology and the Environment/Physical Geography
- VoR (Version of Record)