Hutchings, J.A. & Konecky, B.L.Washington University in St. LouisThe demanding precision of triple oxygen isotope (Δ17O) measurements in water has restricted its measurement to dual-inlet mass spectrometry until the recent development of commercially available infrared-laser analyzers. Laser-based measurements of triple oxygen isotope ratios are now increasingly performed by laboratories seeking to better constrain the source and history of meteoric waters. How...