Mogridge Rhiannon, Stacey Peter, Forder James
Health and Safety Executive, Science Division, Health and Safety Laboratory, Harpur Hill, Buxton, SK17 9AE, United Kingdom
Health and Safety Executive, Science Division, Health and Safety Laboratory, Harpur Hill, Buxton, SK17 9AE, United Kingdom.
Ann Occup Hyg. 2016 Nov;60(9):1084-1091. doi: 10.1093/annhyg/mew051. Epub 2016 Sep 14.
This paper is the second in a series of two describing the performance of a miniature and low-weight respirable sampler designed to fit inside filtering facepiece (FFP) and half-mask type respirators. The first paper described the design of the miniature sampler and evaluated the particle and collection performance of the miniature sampler. This paper assesses its comparability with the traditional inward leakage measurement technique, and its safe use. Simultaneous mass measurements of a respirable sodium chloride aerosol were taken inside a total inward leakage chamber by a miniature sampler and by sodium flame photometry. Direct side-by-side comparison of the two methods yielded excellent correlation (R = 0.99), as did comparison when sampling from inside four different masks when worn by a breathing Sheffield dummy head. In addition, comparison tests were carried out using three models of FFP worn by human volunteers both with and without the miniature sampler, in order to test whether or not the presence of the miniature sampler negatively affected the protection offered. The difference between the tests carried out with the miniature sampler and without the miniature sampler was not statistically significant (P = 0.3). In all cases, the masks performed within their protection class, whether the miniature sampler was fitted or not. We therefore conclude that the miniature sampler does not significantly affect the protection offered by the masks. The miniature sampler may prove a viable option for in-mask measurements of respirable dust where low air concentrations of hazardous material are expected.
本文是系列两篇论文中的第二篇，描述了一种设计用于安装在过滤面罩（FFP）和半面罩式呼吸器内的微型低重量可吸入采样器的性能。第一篇论文介绍了微型采样器的设计，并评估了其颗粒和收集性能。本文评估了它与传统向内泄漏测量技术的可比性及其安全使用情况。在一个全向内泄漏室内，通过微型采样器和钠火焰光度法对可吸入氯化钠气溶胶进行了同步质量测量。两种方法的直接并排比较产生了极好的相关性（R = 0.99），当由谢菲尔德呼吸假人头佩戴从四个不同面罩内部采样时的比较也是如此。此外，使用三种FFP型号，在有和没有微型采样器的情况下由人类志愿者佩戴，进行了比较测试，以测试微型采样器的存在是否会对提供的防护产生负面影响。有微型采样器和没有微型采样器进行的测试之间的差异无统计学意义（P = 0.3）。在所有情况下，无论是否安装微型采样器，面罩都在其防护等级范围内发挥作用。因此，我们得出结论，微型采样器不会显著影响面罩提供的防护。对于预期有害物质空气浓度较低的可吸入粉尘的面罩内测量，微型采样器可能是一种可行的选择。
