在新泽西州中部空气中使用化学电离质谱测量测量短链基和多基物质
James M Mattila1,2, John H Offenberg3
1Oak Ridge Institute for Science and Education, Office of Research and Development, U.S. Environmental Protection Agency, Durham, NC, USA.
Journal of the Air & Waste Management Association (1995)
|June 21, 2024
概括
实时空气监测在新泽西州中部检测到短链和多基物质 (PFAS). 这项研究突出了在线化学电离质谱 (CIMS) 对于接近每万亿分之几的敏感PFAS检测的潜力.
科学领域:
- 环境化学环境化学
- 大气科学 大气科学
- 分析化学 分析化学
背景情况:
- 和多基基物质 (PFAS) 是持久的环境污染物.
- 短链PFAS (C < 8) 由于它们的环境存在和潜在的健康影响,越来越多地被研究.
- 对PFAS的实时大气监测对于来源识别和暴露评估至关重要.
研究的目的:
- 调查在线化学电离质谱仪 (CIMS) 在环境空气中实时测量短链PFAS的潜力.
- 在新泽西州中部的大气中检测和量化特定的短链PFAS化合物.
- 评估CIMS在线和近源监测应用中的可行性.
主要方法:
- 使用校准的CIMS仪器进行实时测量.
- 该CIMS被校准为特定的化碳酸和醇醇醇.
- 对于检测到的PFAS,包括C3H2F6O和C6HF11O3,估计了仪器灵敏度,以确定环境混合比率.
主要成果:
- 在环境空气中检测到三酸 (TFA) 超过仪器检测极限.
- 估计的C3H2F6O (可能是六二) 和C6HF11O3 (可能是六二氧化物二元酸) 的混合比达到了单个部分/万亿体积 (pptv) 的水平.
- 检测到的TFA混合比率高达0.7 pptv.
结论:
- 在线CIMS仪器对于在环境空气中pptv水平或以下的某些短链PFAS实时测量是有效的.
- 这项技术对围线监测和确定空气中的PFAS局部来源有希望.
- 需要进一步的研究,以充分阐明检测到的短链PFAS的来源和影响.
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