Water - δD, δ¹⁸O

Overview

We employ two Picarro liquid water laser analyzers dedicated to measuring δD and δ¹⁸O of water. We are tied to the VSMOW international scale via VSMOW and SLAP for our water isotope measurements. We maintain a suite of in-house reference waters measured against VSMOW and SLAP using GISP as a quality standard. 

Standard Operating Procedures

• CRDS Water Isotope Analysis - δD δ18O

Suggested reading

• Gupta P, Noone D, Galewsky J, Sweeney C, Vaughn BH. (2009) Demonstration of high-precision continuous measurements of water vapor isotopologues in laboratory and remote field deployments using wavelength-scanned cavity ring-down spectroscopy (WS-CRDS) technology. Rapid Communications in Mass Spectrometry 23. doi: 10.1002/rcm.4100
• O'Keefe A, Deacon DAG. (1988) Cavity ringdown optical spectrometer for absorption measurements using pulsed laser sources. Review of Scientific Instruments 59. doi: 10.1063/1.1139895
• Zalicki P, Zare RN. (1995) Cavity ringdown spectroscopy for quantitative absorption measurements. Journal of Chemical Physics 102. doi: 10.1063/1.468647