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Linked comparison
CCQM-K165
Metrology area, Sub-field Chemistry and Biology, Gases
Description Dimethyl sulfide in nitrogen
Time of measurements 2020 - 2021
Status Report in progress, draft B
References

Protocol and Reigistration for CCQM-K165

Measurand Amount-of-substance fraction of dimethyl sulfide in nitrogen
Nominal value: 5 nmol/mol
Transfer device High pressure aluminum cylinders
Comparison type Key Comparison
Consultative Committee CCQM (Consultative Committee for Amount of Substance)
Conducted by CCQM (Consultative Committee for Amount of Substance)
Comments Dimethyl sulfide (DMS) is produced by the enzymatic breakdown of its precursor, dimethylsulphoniopropionate (DMSP) which is a metabolite in marine phytoplankton. DMS is oxidized by radicals (OH, NO3) to form its oxidation products (less volatile compounds) such as sulfur dioxide, dimethyl sulfoxide, dimethyl sulfone, methanesulfonic acid and sulfuric acid. Sulfuric acid contributes to the formation of atmospheric aerosols which influence on the atmosphere radiation budget by altering aerosol properties, cloud properties, and interactions with clouds. Sulfur compounds including DMS exist as important impurities in hydrogen fuel; total sulphur must be less than 4 nmol/mol to avoid degrading the platinum catalyst present in a fuel cell system. DMS presents at trace levels (pmol/mol or nmol/mol) in the atmosphere and hydrogen fuel. Therefore, it is important to develop measurement capability in order to quantify DMS in gas mixtures at trace levels for studying climate change and developing high quality hydrogen fuel. This comparison is designed to underpin the measurement capability of 5 nmol/mol DMS in nitrogen.
Pilot institute KRISS
Korea Research Institute of Standards and Science
Korea, Republic of
Contact person Sangil Lee

+82 42 868 5864
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

NIM

National Institute of Metrology, China, APMP

NPL

National Physical Laboratory, United Kingdom, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

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Comparison
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Results