Automated Measurement of δ13C for Identifying Edible Oils

A fast screening method distinguishes between oils derived from different plant species and can be used to test for product adulteration.

Exceptional Reproducibility from a Picarro Isotopic Water Analyzer

Measuring the same water samples on two consecutive days using the Picarro L1102-i, without calibration, yields highly consistent data.

Automated Measurement of δ18O and δD in Briny (Salty) Samples

A test spanning ca. 1200 separate injections over several days indicates no performance changes or other effects due to salt build-up.

Stable Isotope Ratio Measurement of Dissolved Inorganic Carbon (DIC)

WS-CRDS provides simple δ13C measurements of DIC, enabling the source type of these compounds to be determined.

Calibrating the Picarro Analyzer

This document explains how users can easily apply their own calibration adjustments to Picarro gas and isotope analyzers.

Calibration Routine for Picarro Water Isotope Analyzers

This document explains how users can easily apply their own calibration adjustments, specifically to Picarro water isotope analyzers.

Measuring δ18O and δD for Commercial Foods

A quick screening method of using stable isotopes to distinguish the true origin and/or composition of natural food and beverage products

Applications Note Atmospheric Monitoring

Ultra-Sensitive Measurements of Methane, Carbon Dioxide and Water Vapor for Atmospheric Monitoring. Picarro's CO2/CH4/H2O analyzer is a field-deployable, real-time, ambient gas monitor that measures atmospheric levels of methane and carbon dioxide with ppbv sensitivity and water vapor with ppmv sensitivity. The analyzer maintains high linearity, precision, and accuracy over changing environmental conditions, with minimal calibration. The unique capabilities of the underlying WS-CRDS technology are complemented by a superior analyzer design, including a high-precision wavelength monitor providing immunity to interfering gases, meticulous temperature and pressure control, and robust digital signal processing that transforms raw data into directly useable information. Deployment in several atmospheric monitoring and meteorological facilities, including Penn State University, has shown that the analyzer requires minimal recalibration and no sample conditioning.

Applications Note Ammonia Monitoring

Ultra-Sensitive Ammonia Measurements. Measurement and control of ammonia is critical in a variety of industrial applications including power generation, petrochemical processing, and semiconductor manufacturing. In many cases, ammonia measurement at ppb levels is required to achieve optimal process control or safeguard valuable work-in-process material. Ammonia is difficult to measure at ppb levels because of its "stickiness" - its tendency to adsorb to surfaces - such that varying temperature and ambient moisture levels can produce erroneous measurements. Few instruments exist that can simultaneously meet the sensitivity and speed requirements of the most demanding process control applications. Picarro's trace ammonia analyzer simultaneously provides both the sensitivity and the speed needed for the most demanding ammonia measurement applications and is able to achieve ppb sensitivity in a few minutes and does so directly on the gas stream.