1. International Conference on Harmonization of Technical Requirements for the Registration of Pharmaceuticals for Human Use, Q3C Impurities: Guideline for Residual Solvents, 1997.
2. European Pharmacopoeia, fifth ed., Limit Tests 2.4.24, Identification and Control of Residual Solvents, Council of Europe, Strasbourg, 2005.
3. Japanese Pharmacopoeia, 14th ed., General Tests 51, Residual Solvents Test, Society of Japanese Pharmacopoeia, Tokyo, 2001.
4. The United States Pharmacopoeia, 29th ed., Chemical Tests, 467, Organic Volatile Impurities, The United States Pharmacopeial Convention Inc., Rochville, 2006.
5. Pharmacopoeia of the People's Republic of China, Edition 2005, vol. II: Appendix VIII P, Residual Solvents Test, The State Pharmacopoeia Commission of PR China, Beijing, 2005.