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The FID method, which is specified in guideline VDI 3481 Part 4, allows both the measurement of total organic carbon (TOC) and the measurement of methane. The combined measurement is made possible by using a selective catalytic converter, which nearly completely removes the organic compounds except methane from the sampled gas.
The measurement via converter gives the methane signal, the measurement bypassing the converter gives the TOC signal, the difference of both signals yields the concentration of TOC except methane carbon. The measurement principle is realised in several automatic analysers which are commercially available. The method is suitable for the concentration range from 5 mg/m3 to 5000 mg/m3.
New Guideline: Determination of polycyclic aromatic hydrocarbons (PAH) - GC/MS method
Polycyclic aromatic hydrocarbons (PAH) may be formed in technical processes, in which organic, especially fossil substances are processed, burned or pyrolized. Guideline VDI 3874 specifies a manual method for the determination of PAH in emissions from stationary sources of all industrial br ... more
Determination of NOx-Emissions - VDI Guidline 2456
The emission of nitrogen oxides (NOx) from combustion processes and other industrial processes contributes significantly to air pollution. The guidline VDI 2456 specifies a wet chemical method which is applicable to the determination of the mass concentration of nitrogen monoxide and nitr ... more
New Guideline: Emission Control - Hydrogen Chloride Production and Processing Plants
The guideline VDI 3451 deals with the formation, prevention, abatement and measurement of hydrogen chloride containing emissions, which arise from production and processing of gaseous and aqueous hydrochloric acid, furthermore processes are dealt with in which hydrogen chloride is a by-prod ... more
