Platinum group elements (PGEs) are among the least abundant in the continental crust. They have become excellent tracers of anthropogenic activities, particularly due to their use in catalytic converters or in the medical industry. However, their quantification in environmental matrices is still problematic because of their low concentrations combined with the presence of interfering elements. Preconcentration methods are therefore necessary to measure accurate concentrations. In this study, the quantification of Ir, Rh, Ru, Pd and Pt was studied in depth by focusing on two resins: AG MP-1 (anion exchange) and Purolite® S-920 (chelating) with the aim of developing passive Diffusive Gradients in Thin films (DGT) samplers as in-situ pre-concentration tools. The characteristics of both resins (e.g. adsorption, elution, selectivity, etc.) were studied and the diffusion coefficients of PGEs in different matrices were determined. For the first time, carcinostatic platinum-based drugs were also studied. Better rates and percentages of adsorption were observed for S-920 while AG MP-1 was more selective with regard to spectral interferents and easier to elute. The diffusion coefficients of PGEs were resin-dependent, particularly for carcinostatic platinum-based drugs. For the first time, the applicability of these DGT samplers dedicated to PGEs was demonstrated in the field after their deployment in two wastewater treatment plants in Northern France for which concentrations were found to range from few pg L⁻¹ (Ir, Ru) to few ng L⁻¹ (Pt).

铂族元素（PGEs）在大陆壳中含量最少。它们已成为人为活动的极佳示踪剂，特别是由于它们在催化转化器或医疗行业中的使用。然而，由于它们的低浓度和干扰元素的存在，它们在环境基质中的定量仍然存在问题。因此，需要预浓缩方法来测量准确的浓度。在这项研究中，重点研究了两种树脂：AG MP-1（阴离子交换剂）和Purolite®S-920（螯合剂），从而研究了Ir，Rh，Ru，Pd和Pt的定量，目的是开发被动扩散剂。薄膜（DGT）采样器中的梯度作为原位预浓缩工具。两种树脂的特性（例如研究了吸附，洗脱，选择性等），并确定了PGE在不同基质中的扩散系数。首次还研究了抗癌的铂基药物。对于S-920，观察到更好的吸附速率和百分比，而AG MP-1在光谱干扰物方面更具选择性，并且更易于洗脱。PGEs的扩散系数取决于树脂，特别是对于抗癌的铂基药物。这些专用于PGE的DGT采样器在法国北部的两个废水处理厂中部署后，首次在现场进行了证明，其浓度范围从几pg L ^-1（Ir，Ru）到几pg L ^-1 ng L ^-1（Pt）。