Industrial Hygiene and Toxicology Laboratory, Careggi University Hospital, 50134 Florence, Italy.
Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy.
Int J Environ Res Public Health. 2019 Jun 3;16(11):1969. doi: 10.3390/ijerph16111969.
Carbonyl compounds (CCs) are products present both as vapors and as condensed species adsorbed on the carbonaceous particle matter dispersed in the air of urban areas, due to vehicular traffic and human activities. Chronic exposure to CCs is a potential health risk given the toxicity of these chemicals. The present study reports on the measurement of the concentrations of 14 CCs in air as vapors and 2.5 µm fraction PM by the ENVINT GAS08/16 gas/aerosol sampler, a serial sampler that uses annular denuder, as sampling device. The 14 CCs were derivatized during sampling prior to gas-chromatographic separation and multiple detection by mass spectrometry, nitrogen-phosphorus thermionic, electron capture detection. Outdoor air multiple samples were collected in four locations in the urban area of Florence. The results evidenced that formaldehyde, acetaldehyde, and acetone were the more abundant CCs in the studied areas. The data collected was discussed considering the particle to vapor ratio of each CC found. The CCs pollution picture obtained was tentatively related to the nature and intensity of the traffic transiting by the sampling sites. This approach allowed to determine 14 CCs in both concentrated and diluted samples and is proposed as a tool for investigating outdoor and indoor pollution.
羰基化合物 (CCs) 是存在于空气中的挥发性物质和被吸附在碳质颗粒物上的冷凝物质，这些颗粒物是由于车辆交通和人类活动而分散在城市空气中的。鉴于这些化学物质的毒性，慢性暴露于 CCs 是一种潜在的健康风险。本研究报告了使用环形吸收剂作为采样装置的 ENVINT GAS08/16 气/气溶胶采样器测量空气中 14 种 CCs 的浓度，包括蒸气相和 2.5 µm 颗粒物。在采样过程中，将 14 种 CCs 衍生化，然后进行气相色谱分离和质谱、氮磷热离子、电子捕获检测的多重检测。在佛罗伦萨市区的四个地点采集了室外空气的多个样本。结果表明，在研究区域中，甲醛、乙醛和丙酮是含量较高的 CCs。根据所发现的每种 CC 的粒子与蒸气比，对收集到的数据进行了讨论。获得的 CCs 污染图与采样点经过的交通的性质和强度有关。这种方法可以在浓缩和稀释样品中同时测定 14 种 CCs，被提议作为一种用于调查室外和室内污染的工具。
