NPL services include filter weighing for PM₁₀ and PM_2.5 measurement according to standard protocols, sampling and analysis of metals, anions and PAHs and QA/QC audits for automatic particulate measurement and speciation equipment. Regulatory and research attention is currently focussed on particulate measurement and speciation. NPL provides a high quality, cost effective service, allowing direct comparison with related Defra network measurements, in many cases.

PM₁₀ and PM_2.5

Filter weighing under controlled temperature and humidity conditions. Data validation and QA/QC audit visits for Partisols, TEOMs, Particle counters/sizers and other automatic particulate measurements equipment. Occupational health particulate measurement. Further information on filter weighing measurements and TEOM measurements.

Airborne Nanoparticles

Techniques for particle counting and sizing, aimed primarily at smaller particles in the range 1 – 500 nm, typically known as ultrafine particles or nanoparticles, are described here. We currently maintain the Defra Particle Size and number network, as well as carrying out laboratory research into the use of these instruments.

Metals

UKAS accredited service for particulate metals analysis, and vapour phase mercury, using ICPMS, as carried out by NPL for the Defra Metals Network. Sampling, data validation and QA/QC visits for metals sampling equipment. Details of methods and detection limits.

Organic Carbon / Elemental Carbon

NPL's particle speciation facilities include a Sunset Laboratories Carbon Aerosol Analysis Instrument, which measures the organic and elemental carbon content of particulate matter that has been sampled onto quartz filters following recognised standard methods. Further details.

Anions

Sampling and analysis for sulphate, nitrate, chloride and other anions by Ion Chromatography. Data validation and QA/QC visits for automated speciation equipment as carried out for the Defra Particle Counting and Speciation Network.

PAHs

NPL has a UKAS accredited service for the analysis of particulate and vapour-phase PAHs in ambient air using gas chromatography-mass spectroscopy (GC-MS). Details of the method.

Contact

Customer Service tel: +44 20 8943 8637
E-mail: environmental_enquiries@npl.co.uk