The Identification of Illegal Anabolic Steroids.....
Tweetin Customs Seizures by GCMS and High Resolution LCMS
There have been numerous reports in the news over the last few years of new drugs of abuse becoming available on the UK
market. These have included mephedrone, benzylpiperazine and the so-called synthetic cannabinoids found in ‘Spice’ type herbal
high products. These have all led to revisions of the misuse of drugs act in an attempt to control their distribution and use.
A slightly older problem is the importation of anabolic steroids. In the year 2008/9 there were 802 seizures of anabolic steroids in
the UK [1]. Of these, 259 were by the Borders Agency and the remainder by the Police forces. The misuse of drugs act now
includes most known anabolic steroids and a generic wording to include most ‘designer’ anabolic steroids.
In contrast to previous decades where drugs of abuse were produced domestically or smuggled in to the country, many now arrive in bogusly labeled consignments destined for private addresses in the UK. The UK borders agency
frequently intercepts shipments of significant size containing unknown white powders. These often do not contain the ‘traditional’ drugs of abuse that are readily identified by technology available at ports of entry to the UK. In such situations, seizures are sent for further analysis at laboratories, typically utilising GCMS, in an attempt to make an identification. This approach is often successful where the drug is amenable to GCMS analysis and a reference mass spectrum exists in a library or publication.
There are occasions however where the drug is not suitable for analysis by GCMS or no reference spectrum is available. In such circumstances the use of high resolution LCMS can aid in the identification process.
In recent months, we have been forwarded samples of powders and oils seized by the UK borders agency that could not be identified by GCMS and mass spectral comparison.
Most have been from shipments of several kilograms of material. We have used LCMS consisting of a ThermoFisher Accela UPLC sytem interfaced to an LTQ Orbitrap to identify several anabolic steroids, all of which are controlled under the misuse of drugs act. We have also identified other steroids using GCMS and in-house databases.
The powders received for analysis were found to be anabolic steroids, all ofwhich
are listed as Class C drugs under the Misuse of Drugs Act. The precise origin of
these powders was unknown, but it is likely that they came from China. They were all destined for private addresses in the UK.
The use of high resolution LCMS proved to be very useful in the identification of
these compounds and was certainly complementary to GCMS in that some
compounds, for example stanozolol and trenbolone were best analysed by LCMS
whilst others were detected only by GCMS. Where reference spectra did not exist, as with drostanolone propionate, the combination of both techniques led to identification based on the elemental composition derived from accurate mass
measurement and the similarity of the GCMS derived EI mass spectrum to a
reference spectrum of another compound.
The identification of customs seizures of this type can often be limited by databases and this is where the use of accurate mass can assist in giving additional information. As was shown with this work, accurate mass determination, followed
by the assignment of probable elemental composition, often gives a good starting point in the identification process.
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