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通过FTIR对PVC和PTFE过器进行直接对过器进行晶体二氧化量化的评估

Bankole Osho^1,2, Mohammadreza Elahifard¹, Xiaoliang Wang¹

¹Division of Atmospheric Sciences, Desert Research Institute, Reno, Nevada.

Journal of occupational and environmental hygiene

|July 3, 2024

概括

这项研究比较了聚乙烯 (PVC) 和聚四乙烯 (PTFE) 过器,用于对可呼吸晶体二氧化 (RCS) 进行直接对过器里埃变换红外线 (FTIR) 分析. 这两种过器类型都适用于RCS评估,但准确的量化需要考虑过器吸收变化.

科学领域:

分析化学分析化学
职业健康和安全问题职业健康和安全问题
频谱学是一种光谱学.

背景情况:

直射过器 (DoF) 里埃变换红外光谱 (FTIR) 对于评估可呼吸晶体二氧化 (RCS) 暴露风险至关重要.
降低RCS暴露限值需要提高分析方法的准确性和减少测量不确定性.
过介质的选择对RCS的DoF FTIR分析可靠性产生重大影响.

研究的目的:

用DoF FTIR光谱学系统评估聚乙烯 (PVC) 和聚四乙烯 (PTFE) 过器用于RCS量化.
为了评估空白过器FTIR参考光谱的过器对过器和日复一日的变化.
为了描述颗粒沉积模式,过效率和两种过器类型的压力下降.

主要方法:

对PVC和PTFE过器的空白过器FTIR参考光谱变异性的评估.
使用三件式录音带分析颗粒沉积模式.
在2.5L/分钟的流量下测量过效率和压力下降.

主要成果:

与PTFE过器 (1.2μg/m3使用预样本空白校正) 相比,PVC过器实现了RCS较低的检测极限 (LOD) (5.9μg/m3).
使用预采样空白波器频谱进行校正,可显著降低两个波器类型的RCS量化不确定性.
无论是PVC还是PTFE过器,对于0.1微米左右的颗粒,都显示出高过效率 (≥98.8%),低压下降.

结论:

无论是PVC还是PTFE过器都适合通过DoF FTIR光谱进行RCS分析.
准确的RCS量化需要适当的方法来解决空吸收的变化.
建议使用预抽样空波谱进行光谱校正,以尽量减少不确定性.

关键词:

煤矿的灰尘可能是煤矿的灰尘.工具的现场分析里叶变换的红外线变换根据MSHA的二氧化规则.可呼吸的晶体二氧化.

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