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Measurement for our planet

Following COP26, discover how NPL plays a key role in enabling climate action through the delivery of accurate, reliable data that supports decision making and enables low carbon innovation.

Gas reference materials

Gas standards for PTR-MS

Calibrating Proton Transfer Reaction – Mass Spectrometry instruments

Gas standards for calibrating PTR-MS instruments

NPL provides a 20-component gas mixture standard for calibrating the transmission function of Proton Transfer Reaction – Mass Spectrometry (PTR-MS) instruments. The composition of this standard includes the following compounds at nominally 1 μmol/mol within a nitrogen balance gas. The uncertainties for each compound are in the range of 3-10 %.

benzene

m-xylene

butan-2-one (MEK)

1,2,4-trichlorobenzene

dimethyl sulphide

acetonitrile

1,2,4-trifluorobenzene

+3-carene

3-buten-2-one (MVK)

1,2,4-trimethylbenzene

isoprene

perfluorotributylamine (PFTBA)

hexamethylcyclotrisiloxane

(D3-siloxane)

methanol

toluene

octamethylcyclotetrasiloxane

(D4

-siloxane)

acetone

ethanol

decamethylcyclopentasiloxane

(D5-siloxane)

acetaldehyde

  

Bespoke calibration mixtures

NPL created the 20-component mixture in collaboration with the PTR-MS community to cover the largest mass to charge range currently possible to enable the best constraints on the transmission curve function for these instruments. However, NPL can also provide bespoke mixtures containing different compounds and different amount fractions if required.

Don’t see what you are looking for? Our diverse skill set enables us to provide bespoke solutions. Please contact us to discuss your requirements.

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