Analyte pulse perturbation technique for the determination of 6-O-acetylmorphine in seized street drug samples
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A pulse perturbation technique was applied to the Bray-Liebhafsky (BL) oscillatory reaction system in a stable nonequilibrium stationary state close to the bifurcation point, to determine micro-quantitatively 6-O-acetylmorphine (6-O-AM). The proposed method, in optimized reaction conditions ([KIO3](0) = 5.9 x 10(-2) M, [H2SO4](0) = 5.5 x 10(-2) M, and [H2O2](0) = 2.0 x 10(-1) M, j(o) = 2.95 x 10(-2) min(-1), and T = 42.9 degrees C), relied on the linear relationship between maximal potential shift, Delta E-m, caused by perturbation, and the logarithm of the amount of 6-O-acetylmorphine. The method had a rather good sample throughput of 40 samples h(-1) with the sensitivity determined to be 0.9 mu g mL(-1) and the precision RSD = 1.8%. The proposed method was successfully applied to the quantitative determination of 6-O-AM in a real seized street drug sample. The obtained result agrees with those obtained by HPLC. There was no interference from structurally related and associated compou...nds, such as papaverin, noscapin, and heroin.
Source:Bulletin of the Chemical Society of Japan, 2007, 80, 10, 1942-1948
- Chemical Soc Japan, Tokyo