Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n°. 38206 San Cristóbal de La Laguna, Spain.
Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n°. 38206 San Cristóbal de La Laguna, Spain.
J Chromatogr A. 2020 Jan 25;1611:460620. doi: 10.1016/j.chroma.2019.460620. Epub 2019 Oct 13.
In this work, poly(dopamine)-coated magnetic nanoparticles (FeO@pDA) have been used as sorbents for the magnetic dispersive solid-phase extraction (m-dSPE) of a group of 10 phthalic acid esters (dipropyl phthalate, DPP, dibutyl phthalate, DBP, dicyclohexyl phthalate, DCHP, bis(2-ethylhexyl)phthalate, DEHP, di-n-octyl phthalate, DNOP, diisodecyl phthalate, DIDP, butylbenzyl phthalate, BBP, diisononyl phthalate, DINP, diisopentyl phthalate, DIPP, di-n-pentyl phthalate, DNPP) and one adipate (di(2-ethylhexyl) adipate, DEHA) from sea water and sea sand extracts employing DBP-d and DHP-d as internal standards. After m-dSPE, analysis was carried out by gas chromatography mass spectrometry. Mean recovery values (which were determined at three concentration levels) ranged between 70 and 120%, with relative standard deviation values ≤ 20%, for nearly all analytes in both matrices. Matrix-matched calibration curves revealed the presence of matrix effects for certain PAEs, specially for sea sand, though linearity was assayed with determination coefficients (R) above 0.991 for all target analytes. The limits of quantification of the method were in the range 1.8-319 ng/L for sea water and 0.020-4.0 ng/g for sea sand. Several samples of each type collected at different sites of the coast of Tenerife were also analysed. Only DEHA, DNOP and DIPP were detected in some of the sea sand samples at concentrations ≤ 44 ng/g.
在这项工作中，聚多巴胺包覆的磁性纳米粒子（FeO@pDA）被用作一组 10 种邻苯二甲酸酯（邻苯二甲酸二丙酯、DPP、邻苯二甲酸二丁酯、DBP、邻苯二甲酸二环己酯、DCHP、邻苯二甲酸二（2-乙基己基）酯、DEHP、邻苯二甲酸二正辛酯、DNOP、邻苯二甲酸二异癸酯、DIDP、邻苯二甲酸丁基苄基酯、BBP、邻苯二甲酸二异壬酯、DINP、邻苯二甲酸二异戊酯、DIPP、邻苯二甲酸二正戊酯、DNPP）和一种己二酸酯（邻苯二甲酸二（2-乙基己基）酯、DEHA）的磁性分散固相萃取（m-dSPE）吸附剂，采用 DBP-d 和 DHP-d 作为内标，从海水和海砂提取物中提取。m-dSPE 后，采用气相色谱-质谱法进行分析。在三个浓度水平下测定的平均回收率（RE）在 70%至 120%之间，相对标准偏差（RSD）值均≤20%，几乎所有分析物在两种基质中均如此。基质匹配校准曲线表明，某些 PAEs 存在基质效应，特别是对海砂，但所有目标分析物的线性相关系数（R）均大于 0.991。该方法的检出限（LOD）范围为海水 1.8-319ng/L，海砂 0.020-4.0ng/g。还对特内里费岛海岸不同地点采集的每种类型的多个样本进行了分析。仅在一些海砂样本中检测到 DEHA、DNOP 和 DIPP，浓度≤44ng/g。
