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Preparation and performance features of wristband samplers and considerations for chemical exposure assessment

机译:腕带采样器的制备和性能特点以及化学暴露评估的注意事项

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摘要

Wristbands are increasingly used for assessing personal chemical exposures. Unlike some exposure assessment tools, guidelines for wristbands, such as preparation, applicable chemicals, and transport and storage logistics, are lacking. We tested the wristband’s capacity to capture and retain 148 chemicals including polychlorinated biphenyls (PCBs), pesticides, flame retardants, polycyclic aromatic hydrocarbons (PAHs), and volatile organic chemicals (VOCs). The chemicals span a wide range of physical–chemical properties, with log octanol–air partitioning coefficients from 2.1 to 13.7. All chemicals were quantitatively and precisely recovered from initial exposures, averaging 102% recovery with relative SD ≤21%. In simulated transport conditions at +30 °C, SVOCs were stable up to 1 month (average: 104%) and VOC levels were unchanged (average: 99%) for 7 days. During long-term storage at −20 °C up to 3 (VOCs) or 6 months (SVOCs), all chemical levels were stable from chemical degradation or diffusional losses, averaging 110%. Applying a paired wristband/active sampler study with human participants, the first estimates of wristband–air partitioning coefficients for PAHs are presented to aid in environmental air concentration estimates. Extrapolation of these stability results to other chemicals within the same physical–chemical parameters is expected to yield similar results. As we better define wristband characteristics, wristbands can be better integrated in exposure science and epidemiological studies.
机译:腕带越来越多地用于评估个人化学暴露。与某些暴露评估工具不同,缺少腕带指南,例如准备,适用的化学药品以及运输和存储物流。我们测试了腕带捕获和保留148种化学品的能力,这些化学品包括多氯联苯(PCB),农药,阻燃剂,多环芳烃(PAH)和挥发性有机化学品(VOC)。这些化学品具有广泛的物理化学特性,辛醇-空气的对数分配系数从2.1到13.7。从初始暴露中定量和精确地回收了所有化学品,平均回收率为102%,相对SD≤21%。在+ 30°C的模拟运输条件下,SVOC可以稳定到1个月(平均:104%),而VOC的水平在7天内没有变化(平均:99%)。在-20°C的温度下长期存储至3(VOC)或6个月(SVOC)时,所有化学水平均稳定,不受化学降解或扩散损失的影响,平均为110%。通过对人类参与者进行腕带/主动采样器配对研究,提出了PAHs腕带-空气分配系数的第一个估计值,以帮助估计环境空气浓度。将这些稳定性结果外推到相同理化参数范围内的其他化学品,预计会产生相似的结果。随着我们更好地定义腕带的特性,腕带可以更好地集成到暴露科学和流行病学研究中。

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