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2019

Metrology for society

Airborne molecular contamination (AMC) in the form of chemical vapors or aerosols have a detrimental effect on products, processes or instruments. WG 3.42 will develop a spectroscopic method within this project, which is based on the combination of direct tunable diode laser absorption spectroscopy (dTDLAS) and wavelength modulation spectroscopy (WMS), and which will aim the measurement of HCl...

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The EMPIR-16ENV02 project Black Carbon was launched in summer 2017. During the first phase of the project we have investigated different soot generators regarding their suitability as aerosol sources for absorption photometers. We defined criteria, which aim a certain size range, as well as a defined single-scattering behavior of the soot particles. The first preliminary measurements have been...

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Spectral pressure broadening coefficients of HCl by methane have been determined by WG 3.42, Those added to the application of spectroscopy sensors in quality control of biomethane as an energy source. The work based on direct tunable diode laser absorption spectroscopy (dTDLAS) still aims the qualification of the dTDLAS spectrometer operated with an interband cascade laser (ICL) as an absolute...

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Emission limit values (ELV) for important air pollutants are becoming stricter in European guidelines, which demands for monitoring. Background of the work in WG 3.42 is the application of direct tunable diode laser absorption spectroscopy (dTDLAS) for emission monitoring in cross-stack analyzers. A measurement facility was set up for this purpose, which enables the measurement of HCl...

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Within the frame of the MetNO2 project, WG 3.42 developed FTIR based measurement methods for spectral reference data of NO2, as well as for the detection of impurities in NO2 gas mixtures. The measurements in NO2 are being performed in a corrosion resistant optical short path cell. A newly designed, corrosion resistant long path cell, which is currently in the production phase, shall considerably...

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Die genaue Bestimmung des Quecksilbermassenanteils w(Hg) in einer Lösung mit w(Hg) = 1 g/kg konnte erstmals mit einer relativen erweiterten Messunsicherheit von Urel(w(Hg)) = 0,16 % mittels optischer Emmisionsspektrometrie mit induktiv gekoppeltem Plasma (ICP OES) realisiert werden.

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