Characterization of Crystalline Silica Polymorphs by Infrared Spectroscopy

红外光谱法表征结晶二氧化硅多晶型物

基本信息

批准号：
484630-2015
负责人：
Pellerin, Christian
金额：
$ 1.82万
依托单位：
Université de Montréal
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2015
资助国家：
加拿大
起止时间：
2015-01-01 至 2016-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=584439
关键词：
Characterization Crystalline Silica Polymorphs Infrared

项目摘要

Crystalline silica (such as quartz) is often present in occupational environments where mining, manufacturing and construction are performed. It is estimated that at least 1.7 million North American workers are potentially exposed to respirable dust of crystalline silica. Such exposure is associated with the development of often-fatal lung diseases including silicosis and lung cancer. Efficient sampling and quantification of silica dust is thus important to ensure a safe working environment that respects the occupational exposure limit. Sampling in the workplace consists of drawing air through a cyclone onto a filter cassette to trap respirable dust followed by quantification by infrared spectroscopy or X-ray diffraction. Many laboratories, OSHTECH included, employ a transmission infrared method that has various advantages but that requires cumbersome sample preparation. This project aims to develop a simplified analytical protocol for the quantification of crystalline silica by infrared spectroscopy. We will explore a series of alternative infrared techniques to accurately quantify crystalline silica without multistep preparation and manipulation of the currently applied method. We will conduct measurements using methods such as transmission, diffuse reflection, attenuated total reflection, and photoacoustic infrared spectroscopy. Our ultimate objective is to develop a non-destructive method with a detection limit equal to or even better than that of existing methods. A successful project will help hygiene professionals and regulators to better protect Canadian workers.

晶体二氧化硅（例如石英）通常存在于采矿，制造业的职业环境中和施工进行。据估计，至少有170万北美工人可能是暴露于结晶二氧化硅的可吸入灰尘。这种暴露与经常致命的发展有关肺部疾病，包括硅化病和肺癌。因此，有效的采样和量化二氧化硅尘是重要的是要确保尊重职业暴露限制的安全工作环境。在工作场所包括通过旋风将空气拉到滤镜上，以捕获可呼吸的灰尘，然后通过红外光谱或X射线衍射进行定量。许多实验室（包括Oshtech）都采用具有各种优势但需要繁琐样本准备的传输红外方法。该项目旨在开发一种简化的分析方案，以通过红外光谱。我们将探索一系列替代红外技术，以准确量化没有多步制备的晶体二氧化硅，并操纵当前应用的方法。我们将使用诸如传播，弥漫反射，衰减总反射和等方法进行测量光声红外光谱。我们的最终目标是开发一种用A 检测极限等于甚至比现有方法更好。成功的项目将有助于卫生专业人士和监管机构，以更好地保护加拿大工人。