Optimization of dispersive micro solid-phase extraction for the rapid determination of benzophenone-type ultraviolet absorbers in aqueous samples

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題名:	Optimization of dispersive micro solid-phase extraction for the rapid determination of benzophenone-type ultraviolet absorbers in aqueous samples
作者:	丁望賢;Chung, Wu-Hsun;Tzing, Shin-Hwa;Ding, Wang-Hsien
貢獻者:	理學院化學學系
關鍵詞:	adsorbents;Adsorption;Benzophenone-type UV absorbers;Benzophenones - analysis;cooling;derivatization;desorption;Dispersive micro solid-phase extraction;Gas Chromatography-Mass Spectrometry;municipal wastewater;rapid methods;river water;Rivers - chemistry;screening;silylation;Solid Phase Microextraction - methods;statistical analysis;Sunscreening Agents - analysis;Temperature;Thermal desorption–GC–MS;Ultraviolet Rays;Waste Water - analysis;wastewater treatment;Water analysis;Water Pollutants, Chemical - analysis
日期:	2015-01-01
上傳時間:	2026-04-21 14:33:06 (UTC+8)
出版者:	Elsevier;Netherlands: Elsevier B.V
摘要:	摘要： •Combine DmSPE following simultaneous silylation and thermal desorption for the first time to analyze benzophenone-type UV absorbers.•A simple and solvent-free method to rapidly determine hydroxylated-UV absorbers in water.•The method provides good precision and detection limits at the ng/L level.•The method is low cost and eco-friendly, and avoids carryover problems. A solvent-free method for the rapid analysis of six benzophenone-type UV absorbers in water samples is described. The method involves the use of dispersive micro solid-phase extraction (DmSPE) followed by the simultaneous silylation and thermal desorption (SSTD) gas chromatography–mass spectrometry (GC–MS) operating in the selected-ion-storage (SIS) mode. A Plackett–Burman design was used for screening and a central composite design (CCD) for optimizing the significant factors was applied. The optimal experimental conditions involved immersing 1.5mg of the Oasis HLB adsorbent in a 10mL portion of water sample. After vigorous shaking for 1min, the adsorbents were transferred to a micro-vial, and were dried at 122°C for 3.5min, after cooling, 2μL of the BSTFA silylating reagent was added. For SSTD, the injection-port temperature was held at 70°C for 2.5min for derivatization, and the temperature was then rapidly increased to 340°C to allow the thermal desorption of the TMS-derivatives into the GC for 5.7min. The limits of quantitation (LOQs) were determined to be 1.5–5.0ng/L. Precision, as indicated by relative standard deviations (RSDs), was equal or less than 11% for both intra- and inter-day analysis. Accuracy, expressed as the mean extraction recovery, was between 87% and 95%. A preliminary analysis of the municipal wastewater treatment plant (MWTP) effluent and river water samples revealed that 2-hydroxy-4-methoxybenzophenone (BP-3) was the most common benzophenone-type UV absorber present. Using a standard addition method, the total concentrations of these compounds ranged from 5.1 to 74.8ng/L. 其他題名： J Chromatogr A 出版者： Netherlands: Elsevier B.V 出版日期： 2015-09-11 出處： Journal of Chromatography A, 2015-09, Vol.1411, p.17-22 版權： 2015 Elsevier B.V. 版權： Copyright © 2015 Elsevier B.V. All rights reserved. 識別號： ISSN: 0021-9673 識別號： ISSN: 1873-3778 識別號： EISSN: 1873-3778 識別號： DOI: 10.1016/j.chroma.2015.07.106 識別號： PMID: 26256921
顯示於類別:	[化學學系] 期刊論文

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