期刊
ANALYTICA CHIMICA ACTA
卷 878, 期 -, 页码 131-139出版社
ELSEVIER
DOI: 10.1016/j.aca.2015.03.056
关键词
beta-CD/ATP composite; Dispersive solid-phase extraction; (Fluoro) quinolone antibiotics; Honey samples
资金
- National Natural Science Foundation of China [21277172, 21377163]
- Program for New Century Excellent Talents in University [NCET-100777]
A novel sorbent (beta-CD/ATP composite) for dispersive solid-phase extraction (d-SPE) prepared by bonding beta-cyclodextrin to modified attapulgite via silane coupling was used to determine the concentrations of four (fluoro) quinolones (Qs) in honey samples. The subsequent quantification of the Qs (ciprofloxacin, norfloxacin, ofloxacin, and gatifloxacin) was accomplished using high-performance liquid chromatography (HPLC) with ultraviolet detection after the d-SPE procedure. Parameters that may influence the extraction efficiency, such as type and volume of the eluent, type and amount of the sorbent, times of the vortex and sonication process, and pH of the sample, were investigated using batch and column procedures. The optimal experimental conditions (5 mL sample at pH 3, 4 mg of beta-CD/ATP composite as the sorbent, 200 mu L of 40% ammonia in methanol as the eluent, with vortex time 60 s and sonication time 6 min, and no addition of salt) were obtained from this statistical evaluation. The limits of detection (LODs) were determined to the range from 0.30 to 3.95 mu gL(-1). Good recoveries (83.6-88.6%) were obtained under the optimum conditions, and the relative standard deviations (RSDs), which are used to indicate reproducibility, were less than 7.4%. The method was validated with three real honey samples, and the results demonstrated that beta-CD/ATP composite possessed a high adsorption capacity for Qs. Although the LODs were slightly higher than expected, this study confirmed the possibility of using cyclodextrin grafted palygorskite in analytical applications. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据