1. Associated Octel, 2000. Octaquest E, An effective biodegradable chelating agent, Product literature.
2. Associated Octel, 2001. Technical data Sheet Performance Chemical, Octaquest.
3. Harris, D.C. 1995. In:Quantitative Chemical Analysis, 4th edn, pp. 307—329. Freeman, New York.
4. Hypercube Inc., 1996. Hyperchem Computational Chemistry, Hyperchem 6.1 Manual.
5. OECD,Guidelines for Testing of Chemicals, OECD, Paris, 1993.