In this study, an eco-friendly and accurate analytical protocol was proposed for the determination of cadmium at trace levels. Prior to analysis in flame atomic absorption spectrophotometry (FAAS), an ultraviolet based photochemical vapor generation (PVG) method as a sample introduction system was employed to eliminate matrix effects. PVG system was combined with an online preconcentration technique called T-shaped slotted quartz tube-atom trapping (T-SQT-AT) for online preconcentration of cadmium in order to further increase analytical performance of the system. Hydrogen was used in the releasing of collected Cd atoms from the quartz surface. Under optimum conditions, limit of detection (LOD) and limit of quantitation (LOQ) of the developed method were specified as 2.5 ng/mL and 8.2 ng/mL, respectively. Percent recovery results for tap water and daphne tea samples were found to be between 87.6–105.3% and 90.9–103.3%, respectively.

在这项研究中，提出了一种环保，准确的分析方案，用于痕量镉的测定。在火焰原子吸收分光光度法（FAAS）中进行分析之前，采用基于紫外线的光化学蒸汽发生（PVG）方法作为样品引入系统来消除基体效应。PVG系统与在线预浓缩技术（称为T形开槽石英管-原子捕集器（T-SQT-AT））相结合，用于镉的在线预浓缩，以进一步提高系统的分析性能。氢气用于从石英表面释放收集的Cd原子。在最佳条件下，所开发方法的检测限（LOD）和定量限（LOQ）分别指定为2.5 ng / mL和8.2 ng / mL。