The Picarro L2140-i isotopic water analyzer enables simultaneous measurements of δ18O, δ17O, and δD in solids, liquids and vapor. In addition, the analyzer determines 17O-excess to sub 15 per meg (<0.015‰). Measurements of 17O-excess in conjunction with high precision measurements δ18O and δD enable geoscientists to enhance our understanding of present day climate and the interactions between the hydrosphere and biosphere and to help reconstruct climates of the past. The ability to quantify extremely small deviations in δ17O (i.e., 17O-excess), typically less than 0.1‰ in nature, is essential for paleoclimate, (eco) hydrology, and atmospheric science applications.

• Streamlined, simple, and simultaneous measurements of δ18O, δ17O, δD, and 17O-excess in liquids and vapor 

• Average to<15 per meg precision on 17O-excess for 1-hour vapor measurements 

• Repeat measurements demonstrate 15 per meg precision on 17O-excess for liquids  

  
  

High-precision measurements of all three oxygen isotopes (16O, 18O, and 17O) was once limited to highly specialized labs with expensive, complex sample preparation systems for analysis by isotope ratio mass spectrometry (IRMS). The Picarro L2140-i analyzer delivers precisions of 15 per meg or better on 17O -excess at the touch of button. Introduce water directly into the analyzer, either as vapor or using a vaporization process that converts liquid water to vapor. 

Allan Deviation Plot: 17O-Excess Vapor Performance