In this study, tannic acid functionalized graphene as an adsorbent was synthesized and characterized by X-ray diffraction and scanning electron microscopy. It was used for the first time as an adsorbent for vortex-assisted dispersive solid phase extraction of trace Be(II) from water and street dust samples. The determination of beryllium was made by graphite furnace atomic absorption spectrometry. The effect of different parameters (pH, contact times, centrifuge rate and time, eluent type and volume, sample volume, and interfering ions) was investigated. The optimum pH was found to be 6. The adsorption and elution contact times were 3 min. The quantitative elution was carried out with 2 mL of 1.5 mol L⁻¹ HCl. The preconcentration factor, detection limit and precision (as RSD%) of the method were found to be 125, 0.84 ng L⁻¹, and 2.9%, respectively. The adsorbent showed good selectivity for Be(II) against interfering cations and anions and it was reusable up to 80 cycles. The accuracy of the developed method was confirmed by analyzing certified reference material (TMDA-70 Lake water) and by spiking tap water, wastewater, well water, and street dust samples.

在这项研究中，合成了鞣酸官能化的石墨烯作为吸附剂，并通过X射线衍射和扫描电子显微镜对其进行了表征。首次将其用作吸附剂，用于从水和街道粉尘样品中涡旋辅助分散固相萃取痕量Be（II）。铍的测定采用石墨炉原子吸收光谱法。研究了不同参数（pH，接触时间，离心率和时间，洗脱液类型和体积，样品体积以及干扰离子）的影响。发现最佳pH为6。吸附和洗脱接触时间为3分钟。用2 mL 1.5 mol L ^-1进行定量洗脱盐酸。该方法的预浓系数，检出限和精密度（以RSD％计）分别为125％，0.84 ng L ^-1和2.9％。该吸附剂对Be（II）表现出对干扰阳离子和阴离子的良好选择性，并且可重复使用多达80个循环。通过分析认证的参考物质（TMDA-70湖水）以及掺入自来水，废水，井水和街道粉尘样品，可以确认所开发方法的准确性。