School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Ecotoxicol Environ Saf. 2019 Apr 15;170:789-795. doi: 10.1016/j.ecoenv.2018.12.051. Epub 2018 Dec 26.
Phthalate acid esters (PAEs) are extensively applied in plastic and plastic products, and have caused potential hazards on human and animal health. In this study, a highly sensitive method was proposed for trace detection of selected PAEs in water by gas chromatography-mass spectrometry, after solid-phase extraction (SPE) using octyl (C8)-modified magnetic graphene oxide (MGO-C8) as the adsorbent followed by dispersive liquid-liquid microextraction (DLLME). The prepared MGO-C8 was characterized by Fourier transform infrared spectroscopy (FT-IR), thermo gravimetric analysis (TGA) and vibrating sample magnetometry (VSM). The recoveries of the PAEs using MGO-C8 as the adsorbent were found to be significantly higher those obtained by MGO. The influences of solution pH, adsorption and desorption time, eluent and extractant, and salt addition on the extraction efficiency of PAEs were investigated. Under the optimized conditions, limits of detection (LODs) of 0.5-1.0 ng L for PAEs, and related standard deviations (RSDs) of 4.8-7.5% were obtained. The proposed method was utilized in the detection of trace PAEs in real environmental water samples, with spiked recoveries of 89.5-112.3%, 91.5-105.0% and 98.0-110.0% for DBP, DEHP and DNOP, respectively.
邻苯二甲酸酯（PAEs）广泛应用于塑料和塑料制品中，对人类和动物健康造成了潜在危害。在本研究中，采用固相萃取（SPE）结合十八烷基（C8）修饰的磁性氧化石墨烯（MGO-C8）作为吸附剂，分散液液微萃取（DLLME）后，提出了一种用于痕量检测水中选定 PAEs 的高灵敏度方法。通过傅里叶变换红外光谱（FT-IR）、热重分析（TGA）和振动样品磁强计（VSM）对制备的 MGO-C8 进行了表征。发现使用 MGO-C8 作为吸附剂时，PAEs 的回收率明显高于 MGO。考察了溶液 pH 值、吸附和解吸时间、洗脱剂和萃取剂以及加盐对 PAEs 萃取效率的影响。在优化条件下，PAEs 的检出限（LODs）为 0.5-1.0ng/L，相关标准偏差（RSD）为 4.8-7.5%。该方法用于检测实际环境水样中的痕量 PAEs，DBP、DEHP 和 DNOP 的加标回收率分别为 89.5-112.3%、91.5-105.0%和 98.0-110.0%。
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