Samples of plastic collected from two beaches in southwest England (n = 185) have been analysed by XRF spectrometry for elements that are hazardous or restricted in synthetic polymers (namely, As, Ba, Br, Cd, Cr, Hg, Pb, Sb and Se). Overall, one or more restricted element was detected in 151 samples, with 15 cases exhibiting non-compliance with respect to the Restriction of Hazardous Substances (RoHS) Directive. Twelve plastics that were RoHS-non-compliant were subsequently processed into microplastic-sized fragments and subjected to an avian physiologically-based extraction test (PBET) that simulates the chemical conditions in the gizzard-proventriculus of the northern fulmar. Kinetic profiles of metal and metalloid mobilisation in the PBET were fitted using a pseudo-first-order diffusion model with rate constants ranging from ∼0.02 to 0.5 h⁻¹, while profiles for Br were better fitted with a parabolic diffusion model and rate constants of 7.4–9.5 (μg L⁻¹)⁻¹h^−1/2. Bioaccessibilities, based on maximum or equilibrium concentrations mobilised relative to total (XRF) concentrations, ranged from <1% for Cd and Se in polyethylene and polypropylene to over 10% for Br in a sample of expanded polystyrene and Pb in a sample of PVC. Calculations suggest that ingested plastic could contribute about 6% and 30% of a seabird's exposure to and accumulation of Pb and brominated compounds, respectively.

从英格兰西南部的两个海滩收集的塑料样品（n XRF光谱仪分析了185）中合成聚合物中有害或受限制的元素（即As，Ba，Br，Cd，Cr，Hg，Pb，Sb和Se）。总体而言，在151个样品中检测到一种或多种限制元素，其中15例显示出有害物质限制（RoHS）指令不符合规定。随后将不符合RoHS的十二种塑料加工成微塑料大小的碎片，并进行禽类基于生理的提取试验（PBET），该试验模拟了北ful g部的化学条件。使用伪一阶扩散模型拟合PBET中金属和准金属的运动动力学分布，速率常数范围为约0.02至0.5 h ^-1，而Br的分布更适合抛物线扩散模型，且速率常数为7.4-9.5（μgL ^-1）^-1 h ^-1/2。根据相对于总（XRF）浓度调动的最大浓度或平衡浓度，生物利用度的范围从聚乙烯和聚丙烯中Cd和Se的<1％到膨胀聚苯乙烯样品中的Br和PVC样品中的Pb不到10％。计算表明，摄入的塑料可能分别导致海鸟接触Pb和溴化化合物并堆积的百分比分别为6％和30％。