ANOVA	Analysis of variance
BEIS	UK Department for Bussiness, Energy and Industrial Strategy
BESSY	Berliner Elektronenspeicherring für Synchrotronstrahlung
DCS	Differential Centrifugal Sedimentation
DFM	Dansk Fundamental Metrologi
DLO	Dienst Landbouwkundig Onderzoek
DLS	Dynamic light scattering
EMCCD	Electron multiplying charge coupled device
EMPIR	European Metrology Programme for Innovation and Research
ES-DMA-CPC	Electrospray-differential mobility analysis with a condensation particle counter
FCM	Four-crystal monochromator
HC-PCF	Raman spectroscopy with hollow fiber
HZB	Helmholtz–Zentrum Berlin für Materialien und Energie GmbH
LED	Light emitting diode
LGC	Laboratory of government chemist
METAS	Federal Institute of Metrology of Switzerland
MFM	Mass flow meter
NIST	National Institute of Standards and Technology
NPL	National Physical Laboratory
PS	Polystyrene
PTA	Particle tracking analysis
PTB	Physikalisch-Technische Bundesanstalt
PVA	Polyvinyl alcohol
RISE	Research Institutes of Sweden
SAXS	Small-angle X-ray scattering
SERI	Swiss State Secretariat for Education, Research and Innovation
SI	Systeme International
spICPMS	Single particle inductively coupled plasma mass spectroscopy
TEM	Transmission electron microscopy
TRA	Transient analysis
UV-vis	Ultra-violet visible spectroscopy