WS-CRDS Analyzer for Isotopic CO₂ - Model G1101-i

• Simultaneous, precise measurement of δ¹³C and both CO₂ and H₂O concentration
• PPB sensitivity, precision & accuracy with virtually no drift
• Fast, continuous, real time measurements without interference
• Large dynamic range with high linearity
• Field and laboratory deployable with no consumables
• Installed and operational in minutes
• Rugged and insensitive to changes in ambient temperature

In greenhouse gas applications, it is often critical to measure the carbon isotope ratio δ¹³C in addition to just the total concentration of carbon dioxide. The Picarro G1101-i isotopic CO₂ analyzer is ideal for these applications; it is among the only compact hands-free instruments that can provide real-time measurements of the carbon isotope ratio from ambient CO₂. This ratio formerly could only be obtained by the use of large, complex, expensive instrumentation that required sample capture and a trained instrument technician. In contrast, the G1101-i is a field-deployable analyzer that can be operated remotely and continuously for months with no user intervention, even in harsh environments. The G1101-i is also perfect as a high-performance laboratory reference instrument.

The G1101-i can deliver the normalized carbon isotope ratio, δ¹³C with a guaranteed precision of better than 0.3 per mil (0.03%), in a total sampling time of only 5 minutes. This level of accuracy easily exceeds the needs of a wide range of greenhouse gas monitoring applications and is ideal for creating Keeling plots to detect sequestration leaks as well as to monitor plant canopy carbon exchange processes.

Related Documentation

• Isotopic CO₂ Analyzer Datasheet
• Greenhouse Gas and Isotopic Measurement Article

Data from a Picarro isotopic CO₂ analyzer measuring the isotopic carbon (¹³C/¹²C) ratio from a constant-concentration (407 ppmv) CO₂ gas stream. The measurement precision is 0.15 per mil (in δ¹³C units) in a 5-minute measurement.

CO₂ spectrum taken by CRDS analyzer showing the extremely high measurement resolution (0.0001 cm^-1) used in analyzers designed to measure isotopic ratios of carbon in CO₂.