针对CPDM样本的快速二氧化分析:回收尘埃的沉积和FTIR的分析
1Department of Mining and Minerals Engineering, Virginia Polytechnic Institute & State University, Blacksburg, Virginia.
Journal of occupational and environmental hygiene
|December 10, 2024
概括
一种新方法允许在煤矿中更频繁地监测可呼吸晶体二氧化 (RCS). 这项技术从连续个人尘埃监测器中回收尘埃,并使用富里埃变换红外光谱 (FTIR) 分析它.
科学领域:
- 职业健康和安全问题 职业健康和安全问题
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 美国重现的重症煤炭工人肺结核病与可呼吸晶体二氧化 (RCS) 过度暴露有关.
- 目前的监测方法不足以用于煤矿中频繁的RCS评估.
- 便携式里埃变换红外光谱 (FTIR) 显示出基于现场的石英分析的前景,但在持续个人尘埃监测器 (CPDM) 中面临基质限制.
研究的目的:
- 开发和优化一种方法,用于分析CPDM使用FTIR收集的灰尘中的RCS.
- 建立一个可靠的模型,用FTIR光谱数据预测尘埃重新沉积后的石英质量.
主要方法:
- 一种三步方法,包括从CPDM样本中回收尘埃,通过注射器过重新放置在聚乙烯 (PVC) 过器上,并进行FTIR分析.
- 优化PVC过器尺寸 (25毫米),灰尘沉积模式 ("轮子和子") 和FTIR扫描位置 (四个中心偏移点) 以进行准确的分析.
- 开发一个预测模型,将平均光谱数据与已知的石英质量相关联.
主要成果:
- 通过使用25毫米的PVC过器,直线注射器过器持有器和四点FTIR分析,确定了最佳方法.
- 该方法在含有<0.150毫克石英 (<1.5毫克总质量) 的样本上预测石英质量的标准误差为0.011毫克.
- 增加的总样本质量导致了更高的标准误差,表明尘埃沉积不那么均.
结论:
- 开发的重置和FTIR分析方法使煤矿中更频繁的RCS监测成为可能.
- 这种技术为分析CPDM收集的灰尘中的石英含量提供了可行的解决方案.
- 对于总尘埃质量较高的样品,可能需要进一步细化,以提高准确性.
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