The Recovery of Volatile Organic Compounds and Volatile Sulfur Compounds in Fused-Silica Lined Canisters, Polyvinyl Fluoride/Tedlar Bags, and Foil-Lined Bags,ACS Chemical Health & Safety

当前位置： X-MOL 学术 › ACS Chem. Health Saf. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

The Recovery of Volatile Organic Compounds and Volatile Sulfur Compounds in Fused-Silica Lined Canisters, Polyvinyl Fluoride/Tedlar Bags, and Foil-Lined Bags
ACS Chemical Health & Safety ( IF 2.9 ) Pub Date : 2021-09-21 , DOI: 10.1021/acs.chas.1c00027
Benson R. Young _{1,

2} , Darrah K. Sleeth _{1,

2} , Rodney G. Handy ₂ , Leon F. Pahler _{1,

2}

Affiliation

Accurate and precise monitoring of volatile organic compounds (VOCs) and volatile sulfur compounds (VSCs) is critical to protect individuals against occupational and environmental exposure. Whole-air sampling containers are commonly employed in monitoring, such as fused-silica lined (FSL) canisters, polyvinyl fluoride (PVF) bags, and foil-lined bags. However, these containers have not yet been fully validated, and previous recovery studies are weakened by contradictory findings, short study time, no humidified samples, and unfeasibly high concentrations of VOCs and VSCs. This study evaluated FSL canisters, PVF bags, and foil-lined bags for the recovery of VOCs and VSCs over a period of 20 and 14 days, respectively. This recovery evaluation aimed to quantify the recovery over time of 64 VOCs and 14 VSCs at practical concentrations in the previously specified containers. To better represent field samples, sample containers were prepared at a relative humidity (RH) of 40%, with each set prepared at a “high” (20 ppb for VOCs and 500 ppb for VSCs) and “low” concentration (1 ppb for VOCs and 7 ppb for VSCs). Containers were analyzed intermittently throughout the evaluation period, and sample results were modeled using a first-order natural decay model. From the findings, modeling constants were determined by regression, and a majority (70%) of VOC and VSC models were found to be a good fit (R² > 0.8). PVF bags were found to have higher recoveries for many VSCs than foil-lined bags, and were stable for periods similar to or longer than previously believed. FSL canisters showed a full recovery (>90%) for all VOCs and VSCs over the entire length of the evaluation (20 days for VOCs, 14 days for VSCs). Foil-lined bags were found to have lower recoveries for all VSCs compared to PVF bags.

中文翻译：

熔融石英衬里罐、聚氟乙烯/Tedlar 袋和箔衬里袋中挥发性有机化合物和挥发性硫化合物的回收

准确和精确地监测挥发性有机化合物 (VOC) 和挥发性硫化合物 (VSC) 对于保护个人免受职业和环境暴露至关重要。全空气采样容器通常用于监测，例如熔融石英衬里 (FSL) 罐、聚氟乙烯 (PVF) 袋和箔衬里袋。然而，这些容器尚未得到充分验证，之前的回收率研究因相互矛盾的结果、研究时间短、没有加湿样品以及不可行的高浓度 VOC 和 VSC 而削弱。本研究分别评估了 FSL 罐、PVF 袋和箔衬袋在 20 天和 14 天的时间内回收 VOC 和 VSC。该回收率评估旨在量化先前指定容器中实际浓度的 64 种 VOC 和 14 种 VSC 随时间的回收率。为了更好地代表现场样品，样品容器在 40% 的相对湿度 (RH) 下准备，每组准备在“高”（VOC 为 20 ppb，VSC 为 500 ppb）和“低”浓度（1 ppb 为VOC 和 VSC 为 7 ppb）。在整个评估期间对容器进行间歇性分析，并使用一阶自然衰减模型对样本结果进行建模。从结果来看，建模常数是通过回归确定的，并且发现大多数 (70%) VOC 和 VSC 模型非常适合（每组制备为“高”（VOC 为 20 ppb，VSC 为 500 ppb）和“低”浓度（VOC 为 1 ppb，VSC 为 7 ppb）。在整个评估期间对容器进行间歇性分析，并使用一阶自然衰减模型对样本结果进行建模。从结果来看，建模常数是通过回归确定的，并且发现大多数 (70%) VOC 和 VSC 模型非常适合（每组制备为“高”（VOC 为 20 ppb，VSC 为 500 ppb）和“低”浓度（VOC 为 1 ppb，VSC 为 7 ppb）。在整个评估期间对容器进行间歇性分析，并使用一阶自然衰减模型对样本结果进行建模。从结果来看，建模常数是通过回归确定的，并且发现大多数 (70%) VOC 和 VSC 模型非常适合（R ² > 0.8)。发现 PVF 袋对许多 VSC 的回收率高于箔衬袋，并且在与之前认为的相似或更长的时间内保持稳定。在整个评估期间（VOC 为 20 天，VSC 为 14 天），FSL 罐显示所有 VOC 和 VSC 的完全恢复（>90%）。与 PVF 袋相比，箔衬里袋对所有 VSC 的回收率较低。

更新日期：2021-11-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文