Download Analysis of Controlled Substances by Michael D. Cole PDF

By Michael D. Cole

Offering new advancements in sampling and drug profiling, this booklet additionally offers useful details on how one can perform research, what the implications suggest and the way they are often used as court docket proof and for medicinal drugs intelligence purposes.

* contains case-studies with complete information and spectra, supporting readers to spot substances
* Accessibly geared up by means of type of compound
* comprises an up to date checklist of the latest medicinal drugs

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Additional resources for Analysis of Controlled Substances

Sample text

This should include weight, colour, odour and any other physical characteristic that the scientist considers to be important. Depending upon the number of items in the group, the following sampling strategy, based upon the United Nations Drug Control Programme (UNDCP) recommendations, may be adopted. If there are between 1 and 10 items, all of them should be examined. If there are between 10 and 100 items, then 10 items should be examined, while if there are more than 100 items, the square route of the number of items † May, 2002.

1) The Rf values of the unknowns are compared to those of the standards and if the data cannot be discriminated then a suggested match is called. Although when using this combination of presumptive tests and TLC it is possible to discriminate within this group of compounds, due to the extremely large number of amphetamines available, it is necessary to carry out a confirmatory analytical technique. The foremost of these, for amphetamine identification, is gas chromatography–mass spectrometry (GC–MS).

When setting this method into operation, the HPLC column should be allowed sufficient time to equilibrate with the mobile phase – typically 30–60 min. 9 Why is this long equilibration time required? The calibration standards should be analysed from the weakest to the strongest, with blanks between samples to demonstrate that there has been no ‘carry-over’ between injections. The samples can then be analysed, with ‘check standards’ analysed between every 4th or 5th sample. 10 Why should the calibration curve be prepared from the weakest sample to the strongest?

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