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- W2007476051 abstract "Heptakis (2,6-di-O-methyl)-β-cyclodextrin (DM-β-CD) blending with hydroxy-terminated silicone oil (OH-TSO) coated solid-phase microextraction (SPME) fiber (DM-β-CD/OH-TSO) was first prepared with sol–gel technology and applied to headspace SPME for analysis of ephedrine (EP) and methamphetamine (MA) in human urine by gas chromatography (GC). By exploiting the advantages of the unique cavity-shaped cyclic molecular structure of CD and the superiorities of sol–gel coating technique, the novel fiber showed desirable extraction ability and operational stability. Influence of relevant experimental parameters (extraction time, extraction temperature, basicity, ionic strength, etc.) was systematically investigated. In the optimal conditions the proposed headspace SPME–GC method provided good linearity over four orders of magnitude with limit of detection (LOD) of ng/ml (0.33 ng/ml for EP, 0.60 ng/ml for MA). The recoveries of EP and MA in urine were 98.0% and 98.2%. And the relative standard deviations (R.S.D., n = 6) for EP and MA were 3.9% and 5.0%, respectively." @default.
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- W2007476051 date "2006-01-01" @default.
- W2007476051 modified "2023-10-16" @default.
- W2007476051 title "Novel fiber coated with β-cyclodextrin derivatives used for headspace solid-phase microextraction of ephedrine and methamphetamine in human urine" @default.
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- W2007476051 doi "https://doi.org/10.1016/j.aca.2005.09.063" @default.
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