本研究結果係以甲苯為採樣對象，在不同測試濃度、不同採樣流率、不同溫度及相對溼度等條件下測試，於十二組採樣測試中，大部分活性碳採樣管垂直方向且氣流由下而上時之破過時間最長，垂直方向時氣流由上而下則破過時間最短，水平氣流方向則破過時間介於前述二者之間，僅有少數部分例外（三組）。造成該現象之原因初步研判係因氣流由下而上時，氣流與重力方向相反，漸漸造成介質顆粒跳動之現象，尤以原本填充不緊密時更為明顯，此時顆粒間之間隙變大，流速降低氣流與顆粒充分接觸，故吸附力增強，破出時間增長。
本研究並未對不同採樣介質及被採樣物質之親水性等因子予以研究，故未能對各種採樣情形作相同之結論。
本研究中認為採樣管之方向對採樣之破出體積有影響，故建議未來在從事採樣分析方法之評估或制定時，應考慮該一因素，並予以標明，以免因該一因素造成採樣時之影響。
關鍵詞：採樣管、方向性、破出

The study was tried to investigate the influence of charcoal tube’s orientation on the sampling efficiency. When toluene was use as target compound for sampling, the test was conducted under different effects of concentration, flow-rate, temperature and relative humidity. Among twelve samplings tested, most of the sampling with activated charcoal tube were at the vertical orientation with the breakthrough time being the longest when the air went through the tube from bottom to the top. If the tube was at the vertical orientation and the air went through the tube from top to the bottom , the breakthrough time was shortest. While the tube was at the horizontal orientation, the breakthrough time was in between. There were exceptions to a few cases（there sets）. The reason for this phenomenon was thought to be when air came from bottom to the top of the sampling tube, the air and gravity were at the opposite directions. This gradually caused the particles of the sampling medium to vibrate. Especially when the packing of the sampling tube was loose at the beginning, this phenomenon was more obviously. Due to the spaces between the particles were increased, the sampling tube has higher surface area. Therefore, the capacity of the adsorption was increased and increased the breakthrough time was increased too.
The study did not investigate the factors of mediums and the hydrophilicities of the substances. Therefore, we could make the same conclusion for every sampling case.
Since the results of this study indicate the orientation of the sampling tube has an influence on the breakthrough volume, it is suggest that when evaluating or working out sampling methods, one should consider this factor and offer indication in order to avoid bias caused by this factor.
Key words：charcoal tube, orientation, breakthrough

第一章 緒論
第一節前言
第二節研究動機與目的
第二章 文獻探討
第一節採樣介質（吸附劑）與吸附特性
第二節破出與吸附能力
第三節甲苯危害與特性
第三章 研究方法及材料
第一節測試條件之決定
第二節儀器設備及標準氣體產生系統組裝
第三節採樣條件控制
第四節分析方法
第五節採樣腔濃度測試與評估
第六節採樣介質及採樣方向
第四章 實驗研究成果
第一節標準氣體系統濃度線性關係
第二節檢量線
第三節採樣腔偵測結果與濃度穩定評估
第四節採樣偵測結果
第五章 結論與建議
第一節結論
第二節建議
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