1. National Police Agency, Japan (2006) Drugs and firearms countermeasures: white paper on police 2005. National Police Agency, Tokyo, pp 88–93
2. Budavari S, O’Neil MJ, Smith A, Heckelman PE, Kinneary JF (eds) (1996) The Merck index, 12th edn. Merck, Whitehouse Station, p 551
3. Vu DT (2001) SPME/GC-MS characterization of volatiles associated with methamphetamine: toward the development of a pseudomethamphetamine training material. J Forensic Sci 46:1014–1024
4. Hays PA (2005) Proton nuclear magnetic resonance spectroscopy (NMR) methods for determining the purity of reference drug standards and illicit forensic drug seizures. J Forensic Sci 50:1342–1360
5. Qi Y, Evans ID, McCluskey A (2006) Australian Federal Police seizures of illicit crystalline methamphetamine (“ice”) 1998–2002: impurity analysis. Forensic Sci Int 164:201–210