Whitepapers

Whitepapers

A paper describing the performance of the carbon monoxide measurement of Picarro’s G2302 carbon monoxide, carbon dioxide, and water vapor analyzer. A precision of better than 2 ppb is routinely achieved on CO in five minutes of measurement time.

A methodology and guide to further reducing the analzyer drift dramatically by referencing the measurements to a secondary or working gas standard. 

Stable carbon isotope analysis relies on the simultaneous or near-simultaneous measurement of two individual species (12C16O2 and13C16O2). In this white paper, we report on improvements that we have made in the G2101-i carbon stable isotope gas analyzer to improve near-simultaneous measurements by more than a factor of eight.

A novel methodology and software tool to automatically correct for water vapors and eliminate the need to use gas drying equipment for isotopic CO2 sampling. 

An instrument platform for truly field deployable high precision stable isotope analysis in hydrological lines of inquiry including evaporation, precipitation, transpiration, and transport. 

ChemCorrectTM  is an innovative software system that provides researchers with an unparalleled level confidence in their isotopic water sample fidelity. It also allows researchers can reprocess their data to correct for the spectral irregularities caused by contamination.

The Picarro G1301 three-species greenhouse gas analyzer for the first time permits accurate and precise greenhouse gas measurements in compliance with WMO inter-laboratory comparability standards without requiring dried sample gas. This white paper contains a technical explanation and how-to guide for correcting measurements taken with a Picarro G1301 Analyzer.

Picarro CRDS isotopic analyzers offer significantly lower capital costs than traditional isotope ratio mass spectrometry (IRMS) instruments. There is also a dramatic difference in the operating costs of the two technologies, making CRDS a very attractive option.

Picarro WS-CRDS-based analyzers are the first instruments to provide simple, turnkey access to stable isotope ratios with sensitivity and precision better than or equal to the IRMS (isotope ratio mass spectrometer) systems traditionally used in stable isotope labs. This in-depth whitepaper explains how and why WS-CRDS technology opens the door for widespread exploitation of stable isotope studies in fields such as carbon/water cycle research, GHG (greenhouse gas) monitoring, animal migration, total organic carbon measurements, and human metabolism. Performance data (δ18O, δD, and δ13C) are discussed for applications involving CO2 and H2O (both liquid and vapor-phase direct sampling).

As regional, national and international trading exchanges for carbon credits undergo accelerated expansion, the current approach of "account and extrapolate" must be replaced inevitably by the rigorous discipline of "measure and monitor." Fortunately, the appropriate technology already exists. In this whitepaper, we describe how a portable quantitative analyzer based on WS-CRDS technology provides a universal GHG accounting tool for this purpose – delivering the proven world-class performance that’s used at leading laboratories like NOAA and the Max Planck Institute, together with the turnkey operational simplicity that enables its use by semi-skilled field technicians.

Picarro WS-CRDS-based analyzers are the first GHG monitoring instruments to combine state-of-the-art performance with simple ease of use. In this whitepaper we describe how and why these compact, portable WS-CRDS analyzers provide turnkey operation together with sensitivity and precision at the parts per billion level, no interference between other gas components, and no need for frequent calibration. Performance and applications data are presented for CO2, CH4 and H2O.

The Picarro G1301 has been designed specifically to focus on the needs of the atmospheric monitoring community and to serve as the backbone for greenhouse gas monitoring networks. 

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