不同酸性氣膠採樣器的現場測試研究

A Field Study of Different Acidic Aerosol Samplers

本研究利用一新型的多孔金屬固氣分離器、矽膠管法、吸收瓶、蜂巢式固氣分離器（HDS, Honeycomb denuder system）、Marple 個人多階衝擊器（Marple personal cascade impactor）及濾紙匣採樣器在肥料工廠、半導體工廠、鉛蓄電池工廠及硫酸製造工廠進行採樣測試，量測工作場所中酸性氣膠的濃度及 H+濃度值，分析酸性氣膠被 NH3中和的程度，比較各採樣器之濃度，並瞭解不同工作場所中液滴或微粒的粒徑分布。結論是高濃度的硫酸液滴、鹼性氣體或低濃度的酸性氣膠，在本研究中的四個工作場所的新型固氣分離器的採樣結果，皆與現行的採樣器採集的濃度結果十分接近，相對誤差皆小於 7％，相關係數R2皆在 0.94 範圍內，藉由單因子變異數分析（各採樣器之樣本數為六個），結果發現新型固氣分離器與現行的採樣器的實驗結果並無顯著差異（P 值＞0.05）。新型固氣分離器的體積小且可以同時作液滴及氣體之採樣，所以它可適用於現行工作場所之個人採樣工作。

This study used a new porous-metal denuder、silica gel、impinger、honeycomb denuder system(HDS), Marple personal cascade impactor and filter cassette to conduct tests in factories manufacturing fertilizer、semiconductor wafer、 lead-acid battery and sulfuric acid. The study measured the acidic aerosol concentration and H+ concentration, analyzed the neutralization of acidic aerosols by NH3, compared concentrations of every sampler and tried to understand the liquid or particle size distributions at these different plants. In summary, no matter whether it is sulfuric acid aerosol or basic gas at high concentration, or other acid aerosols at low concentration, the measured concentrations of the new denuder sampler are all very close to those of the commonly used samplers at the four workplaces tested in this study. One-way ANOVA showed no significant differences (P > 0.05) at these plants of six replicate samples among new personal denuder and traditional samplers. Besides its compact size, the new denuder sampler can sample droplets and gases simultaneously, so it is suitable for personal sampling in the workplace.