Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

CCQM K121 – Monoterpenes in Nitrogen at 2.5 nmol mol-1 Final Report



Christina E. Cecelski, George C. Rhoderick, Joseph T. Hodges, Antonio M. Possolo, Cassie A. Goodman, Yong D. Kim, Dal H. Kim, Sangil Lee, Nicholas Allen, Marivon Corbel, David Worton, Richard Brown, Paul Brewer


The growing awareness of climate change, and continuing concerns regarding tropospheric and stratospheric chemistry, will require future measurements and standards for compounds linked to these issues. To monitor and control the emissions of these species globally in the atmosphere, it is necessary to demonstrate measurement equivalence at the highest levels of accuracy for assigned values of standards. This report describes the results of a key comparison for several important monoterpene species, which are relevant to atmospheric chemistry and climate. The comparison samples include α-pinene, 3-carene, R-limonene and 1,8-cineole in a nitrogen matrix gas, at a 2.5 nmol mol-1 amount of substance fraction. The objective of this key comparison is to evaluate the participants’ capabilities to measure trace level monoterpenes using their own calibration techniques.


VOC, terpenes, monoterpenes, gas standards, CCQM key comparison


Cecelski, C. , Rhoderick, G. , Hodges, J. , Possolo, A. , Goodman, C. , Kim, Y. , Kim, D. , Lee, S. , Allen, N. , Corbel, M. , Worton, D. , Brown, R. and Brewer, P. (2018), CCQM K121 – Monoterpenes in Nitrogen at 2.5 nmol mol-1 Final Report, Metrologia, [online], (Accessed June 12, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created November 9, 2018, Updated May 31, 2019