The gasification of carbonaceous material such as biomass or charcoal is an important source for the production of synthetic natural gas. Monitoring the gasification process requires a reliable analyzer that can provide real-time information. Typical tasks include quantifying the compounds contained in the synthetic natural gas, as well as leak detection and determination of potential impurities that can lead to degradation of catalysts used for fuel synthesis or trigger saturation of the gas purification system. In biomass gasification applications, the impurities are called tar and include BTX (benzene, toluene, xylene) and PAH (polycyclic aromatic hydrocarbons). In addition, various inorganic impurities such as H2S and COS may also be present.