簡易二氧化氮被動式採樣器

Simple Diffusive Sampler for Nitrogen Dioxide

本研究針對一般都會大氣環境中二氧化氮濃度範圍（17~165 ppb）研製可行之被動式採樣器，並進行其效率評估。二氧化氮被動式採樣器係由一耐酸鹼，材質為聚丙烯（polypropylene）的多功能檢量瓶與裹覆三乙醇胺的吸收片（材質為polyurethane）所組成。其效率在測試濃度範圍（17~165 ppb）下，平均回收率為99.9 %，標準差為6.5 %，所有樣本之總變異量（overall accuracy）為13.1 %，符合美國NIOSH 採樣分析方法之準則。

This study designed a passive sampler for nitrogen dioxide and evaluated its efficiency at the levels commonly occurring in urban air (17~165 ppb). This sampler was composed of a multiple-vial made of polypropylene, which is resistant to acid or base, and a polyurethane layer coated with triethanolamine. The average recovery at the test levels (16~165 ppb) was 99.9 % with a standard deviation of 6.5 %, and the overall accuracy was 13.1 %, which did meet the sampling and analysis criteria set up by U.S. NIOSH.