Online induction heating for determination of isotope composition of woody stem water with laser spectrometry: A methods assessment

Isotopes in Environmental and Health Studies
By: , and 

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Abstract

Application of stable isotopes of water to studies of plant–soil interactions often requires a substantial preparatory step of extracting water from samples without fractionating isotopes. Online heating is an emerging approach for this need, but is relatively untested and major questions of how to best deliver standards and assess interference by organics have not been evaluated. We examined these issues in our application of measuring woody stem xylem of sagebrush using a Picarro laser spectrometer with online induction heating. We determined (1) effects of cryogenic compared to induction-heating extraction, (2) effects of delivery of standards on filter media compared to on woody stem sections, and (3) spectral interference from organic compounds for these approaches (and developed a technique to do so). Our results suggest that matching sample and standard media improves accuracy, but that isotopic values differ with the extraction method in ways that are not due to spectral interference from organics.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Online induction heating for determination of isotope composition of woody stem water with laser spectrometry: A methods assessment
Series title Isotopes in Environmental and Health Studies
DOI 10.1080/10256016.2016.1141205
Volume 52
Issue 3
Year Published 2016
Language English
Publisher Taylor & Francis
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description 17 p.
First page 309
Last page 325
Online Only (Y/N) N
Additional Online Files (Y/N) N