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The Picarro L2140-i isotopic water analyzer enables simultaneous measurements of δ¹⁸O, δ¹⁷O, and δ²H 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 δ²H 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, δ²H, 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. 

New Measurement Modes on L2130-i and L2140-i Analyzer Offers Higher Throughput

New 'Express mode' will allow measurements of up to 50 samples per day while maintaining excellent precision.

The new 'Survey mode' will allow measurements of up to 150 samples per day. Table 1 preliminarily compares the performance of the existing modes with our new methodologies for increased throughput.

Table 1: Comparison of preliminary results of measurement modes

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