使用自动扫描电子显微镜 (SEM) 量化空气中延长的矿物颗粒 (EMP) 的新方法
Anushka Elangasinghe1,2, Hamesh Patel1,2,3, Kim N Dirks4
1School of Environment, Faculty of Science, University of Auckland, Private Bag, 92019, Auckland, New Zealand.
概括
一种使用扫描电子显微镜与能量分散光谱学 (SEM-EDS) 的新自动化方法可以准确地检测和量化空气中延长的矿物颗粒 (EMP). 这种技术为环境监测提供了比传统显微镜更快,更具结论性的替代方案.
科学领域:
- 环境科学 环境科学
- 职业健康 职业健康 职业健康
- 材料科学 材料科学 材料科学
背景情况:
- 长长的矿物颗粒 (EMP),如埃里奥尼特,由于其可呼吸性质和空气中的分散,造成健康风险.
- 目前的检测方法 (PCM,SEM) 是手动的,耗时的,缺乏确的识别.
- 现有的EMP检测技术的局限性阻碍了大规模监测.
研究的目的:
- 开发和验证用于检测和量化EMP的新型自动化方法.
- 根据尺寸,形态和元素组成简化纤维识别过程.
- 建立一个更有效,更具结论性的空中EMP分析方法.
主要方法:
- 使用自动扫描电子显微镜 (SEM) 与能量分散光谱 (EDS) 相结合.
- 在预先采样的聚碳酸 (PC) 过器上分析的纤维.
- 准备的性能评价标准通过入已知度的埃里奥尼特波器.
主要成果:
- 在石质量百分比和纤维数量之间显示出强烈的线性关系 (R2 = 0.98***).
- 达到每立方厘米 (f/cc) 7.4 个纤维的检测极限.
- 成功地将自动化SEM-EDS方法应用于来自新西兰奥克兰的真实空气样本.
结论:
- 自动化的SEM-EDS方法为EMP检测和量化提供了可靠和高效的方法.
- 这种技术克服了手工显微镜分析的局限性,使得更好的大规模监测.
- 该方法可适应各种分析时间限制和所需的检测极限.
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