Improvements to CO2 headspace biodegradability test
-
Hana Kaňková
,
Hana Kujalová
Abstract
This study proposes changes to the design and evaluation of the CO2 headspace test, which is used as a simple method for assessment of the complete biodegradability of surfactants. It presents a modified equation for the calculation of biodegradation. It is proposed that the solution of 7 mol L−1 sodium hydroxide commonly used in the process involving alkalinisation of the vial contents be replaced with 15 mol L−1 sodium hydroxide. The use of the higher hydroxide concentration leads to a significant reduction in the value of the blank CO2 headspace test.
References
Battersby, N. S. (1997). The ISO headspace CO2 biodegradation test. Chemosphere, 34, 1813-1822. DOI: 10.1016/s0045-6535(96)00358-x.10.1016/S0045-6535(96)00358-XSearch in Google Scholar
Birch, R. R., & Fletcher, R. J. (1991). The application of dissolved inorganic carbon measurements to the study of aerobic biodegradability. Chemosphere, 23, 855-872. DOI: 10.1016/0045-6535(91)90091-q.10.1016/0045-6535(91)90091-QSearch in Google Scholar
International Organization for Standardization (1994). ISO 10707:1994. Water quality - evaluation in an aqueous medium of the ”ultimate” aerobic biodegradability of organic compounds - Method by analysis of biochemical oxygen demand (closed bottle test). Geneve, Switzerland.Search in Google Scholar
International Organization for Standardization (1999a). ISO 14593:1999. Water quality - evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Method by analysis of inorganic carbon in sealed vessels (CO2 headspace test). Geneve, Switzerland.Search in Google Scholar
International Organization for Standardization (1999b). ISO 8245:1999. Water quality - guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC). Geneve, Switzerland.Search in Google Scholar
European Parliament (2004). Regulation (EC) No 648/2004 of the European Parliament and of the Council of 31 March 2004 on detergents. Official Journal, 104, 1-35.Search in Google Scholar
Struijs, J., & Stoltenkamp, J. (1990). Headspace determination of evolved carbon dioxide in a biodegradability screening test. Ecotoxicology and Environmental Safety, 19, 204-211. DOI: 10.1016/0147-6513(90)90068-g.10.1016/0147-6513(90)90068-GSearch in Google Scholar
© 2015 Institute of Chemistry, Slovak Academy of Sciences
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- Analytical procedure for steroid profiling valid for Athlete Biological Passport
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