Ambient 0.5 Hz hydrogen chloride (HCl) measurements were made in Canadian cities to investigate chlorine activation and constrain the tropospheric chlorine budget. Springtime HCl mixing ratios in a coastal city (St. John’s, NL) were up to 1200 parts per trillion by volume (pptv) with a median of 63 pptv and were consistently elevated during daytime. High time-resolution measurements allowed…

Rationale
Induction module cavity ring-down spectroscopy (IM-CRDS) has been proposed as a rapid and cost-effective alternative to cryogenic vacuum distillation (CVD) and isotope ratio mass spectrometry (IRMS) for the measurement of δ¹⁸O and δ²H values in matrix-bound waters. In the current study, we characterized the performance of IM-CRDS relative…

Abstract. Cavity ring-down spectrometers have generally been designed to operate under conditions in which the background gas has a constant composition. However, there are a number of observational and experimental situations of interest in which the background gas has a variable composition. In this study, we examine the effect of background gas composition on a cavity ring-down…

In early 2020, an international team set out to investigate trade-wind cumulus clouds and their coupling to the large-scale circulation through the field campaign EUREC⁴A: ElUcidating the RolE of Clouds-Circulation Coupling in ClimAte. Focused on the western tropical Atlantic near Barbados, EUREC⁴A deployed a number of innovative observational strategies,…

Indoor gas-phase radical sources are poorly understood but expected to be much different from outdoors. Several potential radical sources were measured in a windowless, light-emitting diode (LED)-lit room in a college athletic facility over a 2 week period. Alternating measurements between the room air and the supply air of the heating, ventilation, and air-conditioning system allowed an…

Rationale
The accuracy determined in the routine analysis of water isotopes (δ17O, δ18O, δ2H) using cavity ring-down spectroscopy is greatly affected by the memory effect (ME), a sample-to-sample carryover that biases measurements. This study aims to develop a simple method that rapidly removes the ME.

Methods
We developed a method, designed for the Picarro L2140-i, that…

Describes development of and results obtained from an analyzer engineered by Picarro for measuring six important atmospheric contaminants (hydrogen sulfide, ammonia, nitrous oxide, carbon dioxide, water vapor and methane) that are of interest to researchers monitoring Concentrated Animal Feeding Operations (CAFOs).

Picarro has developed a field-deployable, real time, ambient gas monitor capable of measuring atmospheric levels of carbon dioxide, methane, hydrogen sulfide, and ammonia with parts-per-billion (ppbv) sensitivity and water vapor with parts-per-million (ppmv) sensitivity. Results from field trials of three different CO2 analyzers at Harvard, Penn State, and the NOAA facility in Boulder CO…

Description of field-deployable instrumentation that measures carbon dioxide, methane, and water vapor with both high-accuracy and high-precision would reduce the uncertainty in the determination of terrestrial sources and sinks of these dominant greenhouse gases.

Results presented from field trials at Woods Hole Oceanographic Institute and laboratory tests at INSTAAR of a newly available analyzer capable of performing continuous measurements of stable isotopes (δD and δ18O) of liquid water and / or water vapor samples.

Picarro has developed an isotope analyzer for lab and field measurements of carbon isotopes in CO₂ with the goal of allowing turnkey analysis to be done without the need for flask samples and complex IRMS methods. Here we present a description of the analyzer and its technology as well as recent results from two different collaborators who utilized the analyzer.

Describing work by CSIRO, CO2 CRC and Picarro to characterize sequestration site leaks using tracers and isotopes.

Describes the first field data taken by Oregon State University of Picarro's dual-species Eddy-Covariance analyzer.

Describes work by INSTAAR, NOAA & Picarro on both liquid water and water vapor measurements of stable water isotopes.

From the EGU 2009 General Assembly, describing measurements of edible oils and chocolates made with Picarro's iTOC-CRDS Isotopic Carbon Analyzer.

Describes specific design aspects of WS-CRDS-based analyzers and how these details result in ultra-stable field measurements.

Describes liquid water and water vapor isotope measurements with the Picarro isotopic water analyzer.

Describes field testing of Picarro's fast analyzer for eddy covariance flux measurements of greenhouse gases.

Describes results of laboratory testing and field campaigns with Picarro's flight-ready greenhouse gas analyzer.

Describes results from a Picarro N2O analyzer based in the mid-infrared spectral region.

The quantification of fugitive methane emissions from extended sources such as landfills is problematic due to the high temporal variability and spatial heterogeneity of the emission. Additionally, the relationship between the emission rate and the gas concentration at a given location is dependent on the meteorological conditions and local topography, preventing accurate quantification of…

Describes recent developments in GC-C-CRDS-based instrumentation applied to isotope measurements in large molecules.

G2103, G2308, G2508, G2509 Analyzer User Manual provides safety, packing, hardware setup, basic operation, GUI functions, file management, calibration, troubleshooting, and maintenance.

Picarro Hero Award Winners will also to be featured in Booth #931

Santa Clara, CA — November 29, 2023 — Picarro Inc., a leading provider of gas concentration and stable isotope analyzers and systems for science and industrial applications, will once again be participating in the annual…

Autosampler User Manual - A0340 provides an overview of safety, specifications, packing, installation, startup, Autosampler Configurator software overview, Autosampler UI software overview, sample preparation, maintenance, audible alert definitions, and error codes.

A0601 Zero Reference Module (ZRM) User Manual for Linux operating systems provides introduction, quick start, safety, unpacking, installation requirements, hardware setup, software setup, operation, station integration, calibration, data flow output, errors and troubleshooting, exhaust pump setup, PAIAC chemical specifications and Swagelok instructions.

Ammonia (NH₃) is the highest abundant alkaline gas in the atmosphere, and it is a major contributor to total reactive nitrogen in the environment and causes long-term climate change problems. NH₃ is also a hazardous pollutant with detrimental impacts on human health that demands strict control over personal exposure levels. High-precision quantification of NH_3…

In this poster, Picarro shares research and recommended best practices for using Picarro water isotope analyzers to measure highly enriched and depleted δ²H water isotope samples. These tips will be especially helpful for hydrological tracer studies and kinesiological applications. The experiments show how the Picarro water isotope analyzers’ Express Mode…

This poster highlights a case study on the impacts of wildfire emissions in Canada on the Carolinas and Virginia. It features some really interesting findings comparing the Picarro G2307’s formaldehyde measurements to those from the EPA National Air Toxics Trends Station (NATTS) Network. It shows that by correcting for drift over time, a lower detection limit and…

Anthropogenic emissions from traffic and industrial activities and their impact on air quality are a major concern in urban areas. The concentration of the air pollutants from these sources is typically measured with stationary air quality monitors, which are often limited in number. In addition, these stationary measurements often prove inadequate in representing the emission scenarios of…

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The Picarro PI5310 gas concentration analyzer is designed for high-precision measurements of nitrous oxide (N₂O) and carbon monoxide (CO). Precisely measuring these naturally occurring greenhouse gases (GHGs) is critical to understanding the nitrogen cycle and in atmospheric studies…

Emissions from thousands of in-use heavy-duty diesel trucks were sampled at a highway and an arterial street location in the San Francisco Bay Area, spanning a time period when use of diesel particle filters (DPFs) and selective catalytic reduction (SCR) increased rapidly. At the highway site where a diverse mix of trucks is observed, SCR systems on 2010 and newer engines reduce emitted…

Ammonia (NH₃) is typically present at higher concentrations in indoor air (∼10–70 ppb) than in outdoor air (∼50 ppt to 5 ppb). It is the dominant neutralizer of acidic species in indoor environments, strongly influencing the partitioning of gaseous acidic and basic species to aerosols, surface films, and bulk water. We have measured NH₃ emissions from humans in an…

This white paper outlines testing performed using Picarro’s continuous emissions monitoring system (CEMS) on a LESNI EO Catalytic Abatement Plant (CAP). This testing was performed at a medical device manufacturer and sterilizer facility in the United States during an active sterilization process. Ethylene oxide (EtO, EO) concentrations were measured in real time upstream of the Catalytic…

While litter traits have been used for decades to predict decomposition rates through the Leaf Economics
Spectrum (LES) acquisitive to conservative trait lens, litter trait and litter mixture effects on soil carbon (C)
priming effects (PE) is less known. To assess whether the LES can predict soil C PE during the decomposition of
litter mixtures from complex ecosystems, a 99-day…

A common practice within the current regulatory framework for gas distribution uses an approach where operators report their network emissions by applying an average emission factor for all leaks, sometimes sorted by pipe material and type of assets. Such an approach has two drawbacks: first, it does not account for the specificities of the gas systems and the maintenance processes of…

Breaking News: EPA Implements Groundbreaking Measures to Reduce Ethylene Oxide Emissions and Cancer Risk

March 14, 2024

WASHINGTON – Today marks a significant milestone in the pursuit of public health and environmental justice, as the U.S. Environmental Protection Agency (EPA) unveils a final rule aimed at drastically reducing toxic emissions of ethylene oxide (…

This paper outlines the regulatory framework behind the upcoming changes in the Commercial Sterilizer NESHAP (40 CFR 63 Subpart O). We will discuss how the US EPA decided on the continuous emissions monitoring requirements – including what those requirements are. Many in the sterilization industry have concerns about how to meet these requirements as previous technologies have struggled to…