FN Archimer Export Format PT J TI Attenuated Total Reflection (ATR) Micro-Fourier Transform Infrared (Micro-FT-IR) Spectroscopy to Enhance Repeatability and Reproducibility of Spectra Derived from Single Specimen Organic-Walled Dinoflagellate Cysts BT AF Meyvisch, Pjotr R. Gurdebeke, Pieter Vrielinck, Henk MERTENS, Kenneth Versteegh, Gerard Louwye, Stephen AS 1:1;2:1;3:2;4:3;5:4;6:1; FF 1:;2:;3:;4:PDG-ODE-LITTORAL-LERBO;5:;6:; C1 Department of Geology, Ghent University, Ghent, Belgium Department of Solid-State Sciences, Ghent University, Ghent, Belgium Ifremer, LITTORAL, Concarneau, France Marine Biochemistry Group, Alfred-Wegener-Institute, Bremerhaven, Germany C2 UNIV GHENT, BELGIUM UNIV GHENT, BELGIUM IFREMER, FRANCE INST A WEGENER, GERMANY SI CONCARNEAU SE PDG-ODE-LITTORAL-LERBO IN WOS Ifremer UPR copubli-europe IF 3.5 TC 6 UR https://archimer.ifremer.fr/doc/00721/83307/99890.pdf LA English DT Article DE ;Dinocysts;dinoflagellates;attenuated total reflection;ATR;Fourier transform infrared spectroscopy;FT-IR;micropaleontology;chemotaxonomy;chemometrics;methodology AB The chemical composition of recent and fossil organic-walled dinoflagellate cyst walls and its diversity is poorly understood and analyses on single microscopic specimens are rare. A series of infrared spectroscopic experiments resulted in the proposition of a standardized attenuated total reflection micro-Fourier transform infrared-based method that allows the collection of robust data sets consisting of spectra from individual dinocysts. These data sets are largely devoid of nonchemical artifacts inherent to other infrared spectrochemical methods, which have typically been used to study similar specimens in the past. The influence of sample preparation, specimen morphology and size and spectral data processing steps is also assessed within this methodological framework. As a result, several guidelines are proposed which facilitate the collection and qualitative interpretation of highly reproducible and repeatable spectrochemical data. These, in turn, pave the way for a systematic exploration of dinocyst chemistry and its assessment as a chemotaxonomical tool or proxy. PY 2022 PD FEB SO Applied Spectroscopy SN 0003-7028 PU SAGE Publications VL 76 IS 2 UT 000694677400001 BP 235 EP 254 DI 10.1177/00037028211041172 ID 83307 ER EF