Accurate measurement of tetrabromobisphenol A (TBBPA) is very important because of its widespread environmental pollution. Diffusive gradients in thin films technique (DGT), an in-situ passive sampling method, is regarded as a reliable and robust measurement technique. A new DGT technique based on mesoporous imprinted polymer was combined with high-pressure liquid chromatography (HPLC) method for sampling, preconcentration and monitoring low concentration TBBPA in natural waters. The diffusion coefficient of TBBPA through the diffusive gel was measured by diffusion cell test and simulated using mathematical expression. The effects of different ambient conditions were tested under laboratory conditions and the performance of DGT sampler was validated in natural waters. The diffusion coefficient of TBBPA in the diffusive gel was measured as 2.18 × 10−6 cm2 s−1 and simulated as in the range 1.41–3.48 × 10−6 cm2 s−1 by Amsden model. Comparison of experimental and theoretical data, the validity of the experimental method can be verified by the mathematical model. The binding agent with mesoporous imprinted polymer showed selective affinity to TBBPA and its adsorption rate met the requirement of DGT device. The DGT method detection limit was at the level of ng L−1 for 7 days deployment. DGT sampler was suitable for application in aquatic environment with a range of pH (4.5–7.6), ionic strength (1 × 10−4 - 0.5 mol L−1), and dissolved organic matter (DOM) concentration (0–10 mg C L−1). The coupling method of DGT and HPLC was a promising technique for in situ sampling, preconcentration and monitoring low concentration TBBPA in most typical natural waters.

中文翻译：

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耦合介孔印迹聚合物基 DGT 被动采样器与 HPLC：淡水中低浓度四溴双酚 A 原位选择性测量的新工具


四溴双酚 A （TBBPA） 的准确测量非常重要，因为它具有广泛的环境污染。薄膜中的扩散梯度技术 （DGT） 是一种原位被动采样方法，被认为是一种可靠且稳健的测量技术。一种基于介孔印迹聚合物的新型 DGT 技术与高压液相色谱 （HPLC） 方法相结合，用于对天然水中低浓度 TBBPA 进行采样、预浓缩和监测。通过扩散池测试测量 TBBPA 通过扩散凝胶的扩散系数，并使用数学表达式进行模拟。在实验室条件下测试了不同环境条件的影响，并在自然水中验证了 DGT 采样器的性能。TBBPA 在扩散凝胶中的扩散系数测量为 2.18 × 10-6 cm2 s-1，并通过 Amsden 模型模拟在 1.41-3.48 × 10-6 cm2 s-1 范围内。通过实验和理论数据的比较，可以通过数学模型验证实验方法的有效性。与介孔印迹聚合物的结合剂对 TBBPA 表现出选择性亲和力，其吸附速率满足 DGT 装置的要求。DGT 方法检测限在 ng L-1 水平，部署时间为 7 天。DGT 采样器适用于在 pH 值 （4.5-7.6）、离子强度 （1 × 10-4-0.5 mol L-1） 和溶解有机物 （DOM） 浓度 （0-10 mg C L-1） 范围内的水生环境中应用。DGT 和 HPLC 的耦合方法是一种很有前途的技术，可用于在大多数典型天然水中进行原位采样、预浓缩和监测低浓度 TBBPA。