Ke. Kongshaug et al., Solid-phase microextraction/capillary gas chromatography for the profilingof confiscated ecstacy and amphetamine, CHROMATOGR, 50(3-4), 1999, pp. 247-252
Impurity profiling of ecstacy and amphetamine seizures was accomplished by
solid-phase microextraction (SPME) combined with capillary gas chromatograp
hy (GC). Samples were dissolved in 0.1 M aqueous acetate buffer (pH 5.0) as
the only manual operation and subsequently subjected to SPME-GC. Ecstacy t
ablets were analyzed by head-space SPME to avoid contamination of SPME fibe
rs with insoluble tablet components, while illicit amphetamine powders were
exposed to immersed SPME. A SPME fiber of polydimethylsiloxane-divinylbenz
ene was found to provide excellent extraction of both polar and non-polar i
mpurities. For both illicit ecstacy and amphetamine, complex impurity profi
les were obtained by SPME providing a high information content. For ecstacy
, profiles (relative peak areas) were repeatable within 2.2 to 12.6% RSD (n
= 6), while similar data on amphetamine varied between 2.0 and 10.9% RSD (
n = 6). No carry-over was observed although each fiber was used for 50 to 1
00 extractions.