The µ-pyrolizer setup is employed for fast pyrolysis, catalytic pyrolysis or thermal decomposition of small samples (typically <0.5mg, solid or liquid). It consists of single-shot tandem micro-reactors (Rx-3050tr, Frontier Labs, Japan, No. 1 in picture), coupled with two-dimensional gas chromatography (GC×GC, No. 2) and a separate customized multicolumn GC (Trace 1300, No. 4) for analysis of light gases. The reactors are capable of rapid heating/cooling, and the temperature zones are independently controlled. The online analysis section is equipped for product identification with a BenchTOF-Select™ (Markes, UK, No. 3). The unit works at allowable GC inlet pressures (160-280 kPa) and the temperature can be set between -40 and 700°C (stainless steel tube), or up to 900°C (quartz tube).