Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7608535 | Journal of Chromatography A | 2018 | 11 Pages |
Abstract
Sorbents were prepared by cross-linking β-cyclodextrin (β-CD) using two different types of cross-linker units at variable reactant mole ratios. The resulting polymers containing β-CD were evaluated as sorbents in micro-solid phase extraction (μ-SPE) format for the extraction of the endogenous steroids testosterone (T), epitestosterone (E), androsterone (A), etiocholanolone (Etio), 5α-androstane-3α,17β-diol (5αAdiol) and 5β-androstane-3α,17β-diol (5βAdiol). The best sorbent (C1; cyclodextrin polymer) showed superior extraction characteristics compared with commercial sorbents (C18 and Bond Elut Plexa). Parameters influencing the extraction efficiency of the C1 sorbent such as extraction and desorption times, desorption solvent and volume of sample were investigated. The extracts were separated using a Hypersil Gold column (50â¯Ãâ¯2.1â¯mm, 1.9â¯Î¼m) under gradient elution coupled to a LC-MS/MS. The compounds were successfully separated within 8â¯min. The method offers good repeatability (RSDâ¯<â¯10%) and linearity (r2â¯>â¯0.995) were within the range of 1-200â¯ngâ¯mLâ1 for T and E, 250-4000â¯ngâ¯mLâ1 for A and Etio and 25-500â¯ngâ¯mLâ1 for 5αAdiol and 5βAdiol, respectively. The method was applied for the determination of steroid profile of urine from volunteers.
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Normaliza Abdul Manaf, Bahruddin Saad, Mohamed H. Mohamed, Lee D. Wilson, Aishah A. Latiff,