Publications

Displaying 26 - 35 of 35

Strategies and Practicalities in the Production and Use of Gas Isotope Standard Materials

February 1, 2004

Author(s)

R M. Verkouteren

Isotopic Reference Materials (RMs) are a critical component in the assurance of laboratory analytical quality, and have been applied to growing needs in environmental monitoring, medical and industrial applications, consumer protection, and in the

Value Assignment and Uncertainty Estimation of Selected Light Stable Isotope Reference Materials: RMs 8543-8545, RMs 8562-8564, and RM 8566

December 1, 2003

Author(s)

R M. Verkouteren, D Klinedinst

We report the technical basis for value assignments of several carbon and oxygen stable isotope reference materials distributed by NIST and the International Atomic Energy Agency (IAEA), and make recommendations regarding laboratory practices and future

Isotopic Metrology of Carbon Dioxide. I. Interlaboratory Comparison and Empirical Modeling of Inlet Equilibration Time, Inlet Pressure, and Ion Source Conductance

June 1, 2003

Author(s)

R M. Verkouteren, C E. Allison, S A. Studley, K J. Leckrone

We report a pilot study of high-precision differential isotopic ratio measurements made on replicate samples of pure carbon dioxide using three instruments of identical manufacture. Measurement protocols were designed to explore the effects of sample size

Isotopic Metrology of Carbon Dioxide. II. Effects of Ion Source Materials, Conductance Emission, and Accelerating Voltage on Dual-Inlet Cross Contamination

June 1, 2003

Author(s)

R M. Verkouteren, S Assonov, D Klinedinst, W Brand

We report high-precision isotope carbon dioxide measurements, made before and after ion source modification to gas isotope ratio mass spectrometry (IRMS) instruments. Measurement protocols were designed to explore the effects of ion surce material

Nist-Led International Collaboration Results in Improved Measurement Technology for Light Stable Isotopes Relevant to Climate Change Research

March 1, 2003

Author(s)

R M. Verkouteren

Two manuscripts recently have been accepted in RapidCommunications in Mass Spectrometry that detail aninternational collaboration to identify, understand at afundamental level, and correct measurement biasesmanifested in gas isotope ratio mass

Web-Based Interactive Data Processing: Application to Stable Isotope Metrology

August 1, 2001

Author(s)

R M. Verkouteren, J N. Lee

To address a fundamental need in stable isotope metrology, the National Institute of Standards and Technology (NIST) has established a Web-based interactive data processing system accessible through a common gateway interface (CGI) program on the internet

Final Report of the e-SRM Committee on the Optimal Delivery of Services to Customers for Standard Reference Materials

June 1, 2001

Author(s)

John C. Travis, Sally Bruce, D J. Clarke, James R. Ehrstein, Michael S. Epstein, Daniel G. Friend, T E. Gills, Kenneth G. Inn, Larry L. Lucas, James E. Potzick, M H. Saunders, N M. Trahey, G M. Ugiansky, R. Michael Verkouteren, D P. Vigliotti, Robert Watters

The e-SRM committee was formed at the request of Technology Services (TS) to recommend ways to employ appropriate technologies to optimize the consistency, efficiency, and effectiveness with which NIST provides technical support to customers for Standard

Preparation, Characterization, and Value Assignment of Carbon Dioxide Isotopic Reference Materials: RMs 8562, 8563, and 8564

October 1, 1999

Author(s)

R M. Verkouteren

Three carbon dioxide isotopic Reference Materials (RM 8562, RM 8563, and RM 8564) have been prepared and characterized for composition, heterogeneity, and stability using dual-inlet isotope ratio mass spectrometry. RMs 8562-8564 are not certified, but

Carbon-13 Composition of Tropospheric CO in Brazil: A Model Scenario During the Biomass Burn Season

December 1, 1997

Author(s)

Joseph M. Conny, R M. Verkouteren, Lloyd A. Currie

Iron-Manganese System for Preparation of Radiocarbon AMS Targets: Characterization of Procedural Chemical-Isotopic Blanks and Fractionation

February 18, 1997

Author(s)

R M. Verkouteren, D Klinedinst, Lloyd A. Currie

Search Publications by: R. Michael Verkouteren (Fed)