一种用于表征吸入暴露中使用的吸湿性亚硒酸气溶胶的双同位素方法。

A double isotope method for characterizing hygroscopic selenious acid aerosols used in inhalation exposures.

作者信息

Medinsky M A, Dahl A R, Rothenberg S J, Cuddihy R G

出版信息

Am Ind Hyg Assoc J. 1984 Aug;45(8):562-6. doi: 10.1080/15298668491400269.

Abstract

Methods of generating and characterizing selenious acid aerosols for use in deposition and toxicity studies are described. Selenious acid aerosols were nebulized and heat treated at varied temperatures. Because selenious acid is hygroscopic, a solution containing 3H2O and 75Se was nebulized to determine the water content in selenium aerosols after generation. The stable aerosol was a hydrate of selenious acid, H2SeO3 X 1/2 H2O, at New Mexico ambient relative humidity (ca. 20%). The mass median aerodynamic diameter of the collected droplets was 0.6 micron with a geometric standard deviation of 1.3.

摘要

描述了用于沉积和毒性研究的亚硒酸气溶胶的生成和表征方法。亚硒酸气溶胶通过雾化并在不同温度下进行热处理。由于亚硒酸具有吸湿性，雾化含有3H2O和75Se的溶液以确定生成后硒气溶胶中的水分含量。在新墨西哥州的环境相对湿度（约20%）下，稳定的气溶胶是亚硒酸的水合物H2SeO3·1/2H2O。收集到的液滴的质量中值空气动力学直径为0.6微米，几何标准差为1.3。