. 2023 Mar 3;107(7-8):2073–2095. doi: 10.1007/s00253-023-12406-6

Table 6.

Modern combined tests on ready biodegradability

Test	Method	Test principle	Remarks
Combined CO₂/DOC test (CTS)	Combination of OECD 301 A/B (1992), ISO 9439 (1992) and ISO 14593 (1999); Strotmann et al. 1993a; Gartiser et al. 2017; Gartiser et al. 2022)	Static aerobic test simultaneous measurement of DOC removal and CO₂ production	Non-volatile compounds; versatile test system
Multicomponent test system (MCTS)	Combination of OECD 301 A (1992), OECD 301 B (1992), OECD 301 E (1992), OECD 301 F (1992), OECD 306 (1992), OECD 310 (2014), ISO 7827 (2010), ISO 9439 (1999), ISO 7827 (2010), ISO 9408 (1999), ISO 14593 (1999); (Strotmann et al. 2004)	Static aerobic test, simultaneous measurement of BOD, DOC removal, CO₂ production, specific analysis and online measurements possible, determination of carbon flow; CO₂ determination via a conductivity electrode	Volatile and non-volatile compounds; versatile test system
Ultimately transformed organic carbon (UTOC) system	Combination of OECD 301 A (1992), OECD 301 B (1992), OECD 301 E (1992), OECD 301 F (1992), OECD 306 (1992), OECD 310 (2014), ISO 7827 (2010), ISO 9439 (1999), ISO 7827 (2010), ISO 9408 (1999), ISO 14593 (1999); (Brillet et al. 2018)	Static aerobic test system, online measurements, simultaneous measurement of BOD, DOC removal, CO₂ production, specific analysis also possible, determination of carbon flow; CO₂ determination via a CO₂ sensor	Volatile and non-volatile compounds; versatile test system