To extract polyaromatic hydrocarbons (PAHs) from water samples using the Solid Phase Extraction (SPE) method. Based on hemimicelle/admicelle formation on the oxide surface, the cetyltrimethylammonium bromide-titanate nanotube system has been used as an adsorbent for PAHs extraction. Many experiments were conducted to optimize the extraction parameters, and resulting extracts were analyzed using Gas Chromatography-Flame Ionization Detection. Results showed that the kind and volume of elution solvent, the pH, volume, and concentrations of the sample, and the pH PAH and concentration of the cetyltrimethylammonium bromide significantly affect extraction yields. Under optimal conditions, modified TiO₂ nanotubes exhibited their good enrichment capacity for PAHs (∼100%). Furthermore, the method of the analysis showed good linearity (R² greater than 0.99), satisfactory repeatability (Relative standard deviation RSD between 4.8 and 11.2), and detection limits between 0.08 and 0.3 ng mL-¹. The present SPE method showed competitive results with those given using multiwalled carbon nanotubes as adsorbent, and even better than those determined by the usual SPE-C18-silica method and liquid–liquid – extraction. The proposed method was applied to real water samples, and recoveries were between 80 and 99%, showing minimal matrix effect and the robustness of the optimized SPE method.

使用固相萃取 (SPE) 方法从水样中提取多环芳烃 (PAH)。基于氧化物表面上的半胶束/胶束形成，十六烷基三甲基溴化铵-钛酸盐纳米管系统已被用作多环芳烃萃取的吸附剂。进行了许多实验来优化提取参数，并使用气相色谱-火焰电离检测分析所得提取物。结果表明，洗脱溶剂的种类和体积，样品的pH、体积和浓度，以及PAH的pH和十六烷基三甲基溴化铵的浓度显着影响提取率。在最佳条件下，改性TiO ₂纳米管表现出良好的 PAH 富集能力（~100%）。此外，该分析方法显示出良好的线性（R ² 大于0.99）、令人满意的重复性（相对标准偏差RSD在4.8至11.2之间）以及检测限在0.08至0.3 ng mL- ¹之间。目前的 SPE 方法显示出与使用多壁碳纳米管作为吸附剂的方法相媲美的结果，甚至比通常的 SPE-C18-二氧化硅方法和液液萃取法所测定的结果更好。该方法应用于实际水样，回收率在 80% 至 99% 之间，显示出最小的基质效应和优化的 SPE 方法的稳健性。