By Michael D. Cole
Offering new advancements in sampling and drug profiling, this ebook additionally offers sensible details on how one can perform research, what the implications suggest and the way they are often used as courtroom facts and for medications intelligence purposes.
* contains case-studies with complete facts and spectra, aiding readers to spot substances
* Accessibly prepared by means of classification of compound
* includes an up to date checklist of the most recent medicines
Read or Download The Analysis of Controlled Substances (Analytical Techniques in the Sciences (AnTs) *) PDF
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Additional info for The Analysis of Controlled Substances (Analytical Techniques in the Sciences (AnTs) *)
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Shulgin, A. , Phenethylamines I Have Known and Loved, Transform Press, Berkeley, CA, 1991. 2. , Recreational Drugs, Loompanics Unlimited, Port Townsend, WA, 1989. 3. Aitken, C. G. ’, J. , 44, 750–760 (1999). 4. , personal communication. 5. , personal communication. 6. Munro, C. H. and White, P. , ‘Evaluation of diazonium salts as visualisation reagents for the thin layer chromatographic characterisation of amphetamines’, Sci. Justice, 35, 37–44 (1995). 7. Moffat, A. , Jackson, J. , Moss, M. , Widdop, B.
Unlike cannabis, heroin and cocaine, the impurities are present in very low concentrations and need to be extracted from the amphetamine matrix. Liquid–liquid extraction (LLE) and solid-phase extraction (SPE) have been most frequently applied for this purpose [13–16]. Of these, LLE is currently the most widely used technique. In addition, there are attempts being made to develop the method so that it can be optimized to allow data exchange between different laboratories (in different countries) [17].
Linearity and a linear dynamic range (the range of concentrations over which the detector response is linear) must be achieved when the method is first developed. From this point on, a range of standards within this linear range can be used to calculate a regression equation. The latter can then be employed to obtain the concentration of the sample being analysed. Some laboratories use standards of known concentration to determine if there is deviation from the line (this is equivalent to a single point estimate being used as a check standard), while others use low- and high-concentration standards to recalculate the equation of the line every five or ten samples.