Abstract A sensitive and effective analytical method was developed to preconcentrate antimony from the bergamot and mint tea samples for its determination at trace levels by slotted quartz tube-flame atomic absorption spectrophotometry (SQT-FAAS) system. The developed method was based on vortex assisted ligandless dispersive solid phase extraction (VA-LDSPE) using zirconium nanoparticles (Zr-NPs) as sorbent material for the adsorption of the target analyte. All variables involved in the DSPE method (pH value, nanoparticle amount, mixing and eluent type/volume) were optimized to boost the absorbance signal of antimony. Using the optimal parameters, the method provided satisfactory detection and quantification limits of 8.0 and 26.8 μg L−1, respectively. A 180 folds enrichment factor was achieved by the developed method when compared with the detection power of the FAAS. Linear range of the proposed method was found to be 30–250 μg L−1, with a coefficient of determination value of 0.9992. The established Zr-NPs-VA-LDSPE-SQT-FAAS method was successfully implemented to bergamot tea samples in order to check accuracy and applicability. The obtained recovery values ranged between 93–102%, and this demonstrated that the complex matrices tested did not affect the accuracy of quantifying antimony.

中文翻译：

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基于锆纳米粒子的无配体分散固相萃取法测定佛手柑和薄荷茶样品中的锑，采用开槽石英管-火焰原子吸收分光光度法

摘要 建立了一种灵敏、有效的分析方法，用于预浓缩佛手柑和薄荷茶样品中的锑，并用开槽石英管-火焰原子吸收分光光度法 (SQT-FAAS) 系统测定痕量水平。开发的方法基于涡流辅助无配体分散固相萃取 (VA-LDPE)，使用锆纳米粒子 (Zr-NPs) 作为吸附剂材料吸附目标分析物。DSPE 方法中涉及的所有变量（pH 值、纳米颗粒量、混合和洗脱液类型/体积）都经过优化以增强锑的吸光度信号。使用最佳参数，该方法提供了令人满意的检测和定量限，分别为 8.0 和 26.8 μg L-1。与 FAAS 的检测能力相比，所开发的方法实现了 180 倍的富集因子。发现该方法的线性范围为 30-250 μg L-1，确定系数值为 0.9992。建立的 Zr-NPs-VA-LDSPE-SQT-FAAS 方法已成功应用于佛手柑茶样品，以检查准确性和适用性。获得的回收率值介于 93-102% 之间，这表明测试的复杂基质不会影响定量锑的准确性。