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

• 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

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.

结晶二氧化硅（如石英）通常存在于采矿、制造业 进行施工。据估计，至少有170万北美工人可能 暴露在可吸入的结晶二氧化硅粉尘中。这种接触与发展往往是致命的 肺部疾病包括矽肺和肺癌。因此，对二氧化硅粉尘进行有效的取样和定量分析， 重要的是要确保一个安全的工作环境，尊重职业接触限制。抽样 工作场所包括通过旋风器将空气吸入过滤盒以捕获可吸入的灰尘， 通过红外光谱或X射线衍射进行定量。许多实验室，包括OSHTECH， 透射红外法具有各种优点，但需要繁琐的样品制备。 该项目旨在开发一种简化的分析协议，用于量化结晶二氧化硅， 红外光谱法我们将探索一系列替代红外技术， 结晶二氧化硅，而不需要目前应用的方法的多步制备和操作。我们将 使用透射、漫反射、衰减全反射等方法进行测量， 光声红外光谱我们的最终目标是开发一种非破坏性的方法， 检测限等于或甚至优于现有方法。一个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。