A novel and reliable microextraction technique was used for the fast determination of benzene, toluene, ethylbenzene and xylenes (BTEX) from contaminated water without any extra steps for the preparation or extraction of the aqueous sample. Vacuum-assisted-total vaporization-solid-phase microextraction (SPME) eliminated one of the partitioning steps in conventional headspace SPME and caused an increase in the sensitivity and speed of the method. A home-made graphene oxide/3-aminopropyl-triethoxysilane nanocomposite SPME fiber was synthesized and used as the extraction phase for efficient extraction. Several crucial parameters were optimized, such as the vaporization time and temperature, extraction time and desorption conditions. At the optimum experimental conditions, a linear wide range calibration curve over a wide range of 1–5,000 ng mL−1 and a relative standard deviation (n = 6) of 6.6–7.3% were obtained. The result of the determination of BTEX as a human health risk from real samples, using the proposed method, revealed an acceptable agreement with a valid method.

中文翻译：

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使用新型真空辅助全汽化固相微萃取法和 GO-APTES 纤维测定污染水中的 BTEX 化合物

一种新颖且可靠的微萃取技术用于快速测定污染水中的苯、甲苯、乙苯和二甲苯 (BTEX)，无需任何额外的水样制备或萃取步骤。真空辅助全汽化固相微萃取 (SPME) 消除了传统顶空固相微萃取中的一个分配步骤，并提高了该方法的灵敏度和速度。合成了自制的氧化石墨烯/3-氨基丙基-三乙氧基硅烷纳米复合固相微萃取纤维，并作为萃取相进行高效萃取。优化了几个关键参数，如汽化时间和温度、萃取时间和解吸条件。在最佳实验条件下，1-5 宽范围内的线性宽范围校准曲线，获得了 000 ng mL-1 和 6.6-7.3% 的相对标准偏差 (n = 6)。使用所提出的方法将 BTEX 确定为真实样品中的人类健康风险的结果显示出与有效方法的可接受一致性。