Hydrogen isotopic ratios of long-chain diols reflect salinity. (November 2019)

• Record Type: Journal Article
• Authors: Lattaud, Julie; Erdem, Zeynep; Weiss, Gabriella M.; Rush, Darci; Balzano, Sergio; Chivall, David; van der Meer, Marcel T.J.; Hopmans, Ellen C.; Sinninghe Damsté, Jaap S.; Schouten, Stefan
• Is Part Of: Organic geochemistry. Volume 137(2019)
• Publication Date: 2019-11
• Subjects: Hydrogen isotopes -- Long-chain diols -- Salinity -- Preparative HPLC; Organic geochemistry -- Periodicals; Biogeochemistry -- Periodicals; Géochimie organique -- Périodiques; 553.205
• DOI: 10.1016/j.orggeochem.2019.103904
• Languages: English
• ISSNs: 0146-6380

Abstract

Highlights: Refined separation method allows the δ 2 H measurement of long-chain diols. δ 2 H composition of long-chain diols of Nannochloropsis matches the growth medium. Hydrogen isotopic ratios of C32 1, 15-diol reflects its origin in fresh river water. Hydrogen isotopic ratios of C30 1, 15-diol reflects sea water isotopic composition. Abstract: Long-chain diols (LCDs) are ubiquitous lipids produced by freshwater and marine algae. A combination of semi-preparative high performance liquid chromatography and gas chromatography isotope ratio monitoring mass spectrometry, allowed the measurement of δ 2 H of individual LCDs from cultures, which indicated a correlation with the hydrogen isotope composition of the growth water and a species-specific effect. Results from environmental samples along a salinity gradient indicated the potential of δ 2 H ratios of LCDs to trace the hydrogen isotopic composition of water and sea surface salinity.