Performance of a novel magnetic solid-phase-extraction microsphere and its application in the detection of organic micropollutants in the Huai River, China
Performance of a novel magnetic solid-phase-extraction microsphere and its application in the detection of organic micropollutants in the Huai River, China
复制标题
新型磁性固相萃取微球的性能及其在淮河有机微污染物检测中的应用
DOI：
10.1016/j.envpol.2019.05.115
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发表时间：
2019
影响因子：
8.9
通讯作者：
Li Aimin
中科院分区：
文献类型：
--
作者：
Liang Ying;Li Zekai;Shi Peng;Ling Chen;Chen Xun;Zhou Qing;Li Aimin
固相萃取技术在有机污染物检测中的应用日益广泛。然而，耗时和高成本的缺点也限制了该方法的广泛应用，特别是对于大体积现场水样的提取。建立了基于磁性微球（M150）固相萃取（MSPE）的气相色谱-质谱（GC-MS）联用技术，对淮河干流水源水中有机金属多组分进行了分析。结果表明，M150对多环芳烃（PAHs）、有机氯农药（OCPs）、邻苯二甲酸酯（PAEs）和硝基苯类（NBs）等有机金属污染物的萃取效果上级C18和HLB，方法检出限与C18和HLB相当。结果表明，在微球用量为100 mg/L、提取时间为60 min、pH为2的条件下，洗脱液的极性、疏水性和分子结构与外膜多糖相似，洗脱效率较高。应用该方法对淮河水源水中21种OMP进行了检测，其总浓度为505-2310 ng/L，主要为多环芳烃、有机氯农药、邻苯二甲酸酯和硝基苯。还观察到OMP的空间差异，证明污染物概况和地理位置之间的联系。本研究为现场水样中有机金属化合物的富集提供了一种新的方法，并揭示了淮河全流域水源水的污染特征。
Solid phase extraction has been increasingly applied for the detection of organic micropollutants (OMPs). However, time-consuming and high-cost disadvantages also limit the widespread use of this method, especially for the extraction of large-volume field water samples. In this study, a gas chromatography-mass spectrometry (GC-MS) method based on the magnetic microsphere (M150) solid-phase-extraction (MSPE) was established to investigate the OMPs in source water throughout the whole Huai River. In brief, the results demonstrated that the extraction efficiency of the M150 was superior to that of C18and HLB for the selected OMPs, including species of polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), phthalate esters (PAEs) and nitrobenzenes (NBs), and the method detection limits of M150 for these OMPs were comparable to those of C18and HLB. The optimized conditions of extraction and elution were the 100 mg/L dosages of microspheres, extraction time of 60 min and pH of 2, and the eluent with a similar polarity, hydrophobicity and molecular structure to the OMPs rendered higher elution efficiencies. A total of 21 types of OMPs affiliating to PAHs, OCPs, PAEs and NBs were detected by the established method, with the total concentrations of 505–2310 ng/L in source water of the Huai River. Spatial differences of the OMPs were also observed, demonstrating the link between pollutant profiles and geographical locations. This study provides an alternative to enrich OMPs in filed water samples, and it reveals pollutant profiles of source water throughout the whole Huai River.