Quantification of biogenic silica by means of Fourier transform infrared spectroscopy (FTIRS) in marine sediments

Vogel, Hendrik; Meyer-Jacob, Carsten; Thöle, Lena; Lippold, Jörg; Jaccard, Samuel (2016). Quantification of biogenic silica by means of Fourier transform infrared spectroscopy (FTIRS) in marine sediments. Limnology and oceanography: methods, 14(12), pp. 828-838. Association for the Sciences of Limnology and Oceanography 10.1002/lom3.10129

[img] Text
quantification.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (1MB) | Request a copy

Due to the major role played by diatoms in the marine biological pump, opal/biogenic silica (bSi) has a strong potential as a proxy for paleoproduction reconstructions. Here, we present a detailed evaluation of the independent Fourier transform infrared spectroscopy (FTIRS) calibration introduced by Meyer-Jacob et al. (2014a), which is based on synthetic sediment mixtures with known concentrations of bSi and the application of partial least squares (PLS) regression, for the determination of bSi in marine sediments. To test the robustness of the FTIRS calibration for marine samples we selected 199 globally distributed samples, with available wet chemically inferred bSi concentrations and compared the results of both methods. We observe that the spectral characteristics in marine samples are comparable to those reported for a synthetic FTIR spectrum composed solely of spectral features in quartz, biogenic silica, and calcite. FTIRS-inferred and wet-chemically measured bSi concentrations for the set of 199 marine sediment samples are strongly correlated (R2 = 0.87; RMSE = 5.27%). Together with the high reproducibility of bSi values by the independent calibration our results corroborate the applicability of the independent FTIRS bSi calibration for quantification in marine samples. This together with the succinct sample preparation procedure, rapid analysis, reduced consumable and machine maintenance costs makes FTIRS a powerful and robust alternative for the quantitative analysis of bSi in marine sediments.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geological Sciences

Graduate School:

Graduate School of Climate Sciences

UniBE Contributor:

Vogel, Hendrik; Thöle, Lena; Lippold, Jörg and Jaccard, Samuel

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

1541-5856

Publisher:

Association for the Sciences of Limnology and Oceanography

Language:

English

Submitter:

Hendrik Vogel

Date Deposited:

30 Jan 2017 14:55

Last Modified:

08 Mar 2017 16:03

Publisher DOI:

10.1002/lom3.10129

BORIS DOI:

10.7892/boris.92339

URI:

https://boris.unibe.ch/id/eprint/92339

Actions (login required)

Edit item Edit item
Provide Feedback