本研究的目的為建立一套「空氣中C2至C10之醛酮醇類分析方法」，目標物種共有26個。本研究以不□鋼採樣罐作為採樣介質，樣品在進樣之前會先被冷凝在去活化玻璃珠上作一前濃縮的處理，再瞬間加熱脫附樣品進入氣相層析儀作分析。分析系統方面使用雙管柱搭配兩個偵檢器:其中RTX-502.2管柱連接到質譜儀主要用來檢測24種極性物種而CP-WAX管柱則連接到火焰離子偵檢器上主要用來檢測丙酮與丙醛。本方法的精密度、準確度、平均回收率和偵測極限除了辛醇以外為±20% 、±30% 、70%~130%以及20ppbv以內，因為辛醇的蒸氣壓很低，造成它的品保品管的數據都比其他物種差。檢量線的線性範圍在5 ~150ppbv之間。在真實樣品測試中在新竹縣工業區共測到9個物種(乙醛、丙醛、丙酮、丁醛、丁酮、3-庚酮、2-庚酮、辛酮和壬酮)，總樣品濃度為50.34ppbv。

An analytical method is designed , developed and tested for determining 26 polar compounds ( C2-C10 aldehydes , alcohols , ketones ) in the ppmv-ppbv range . This method uses canisters as samplers. Air sample is trapped on glass beads for pre-concentration and thermally desorped into capillary column. Dual columns coupled with dual detectors, RTX 502.2 with MS and CP-WAX with FID , are used. The CP-WAX column is used to determine acetone and propanal and the other compounds are determined using RTX 502.2 column with MS . The precision, accuracy, average recovery and MDL of the developed techniques is in the range of ±20%, ±30%, 70%~130% and 20ppbv, respectively, except for 1-octanol due to its lower vapor pressure. The sum of target compound (acetaldehyde, propanal, acetone, butyraldehyde, 2-butanone, 3-heptanone, 2-heptanone, 2-octanone and 2-nonanone) concentration of real sample collect from an industrial area of Hsin Chu county measured an average of 50.34ppbv in ambient air.

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