排放管道中乙二醇與二乙醇胺檢測方法開發研究

Abstract

本研究主要目的是開發排放管道中乙二醇(EG)與二乙醇胺(DEA)空氣污染物的檢測方法，EG與DEA污染物均以衝擊瓶進行樣品採集。EG使用火焰離子偵測器的氣相層析儀(GC-FID)搭配極性較高的HP-INNOWAX管柱，線性回歸r值可高達0.9991，方法偵測極限(MDL)值是0.187 mg/L，準確度為87.4~101.9 %，精密度為3.8 %。DEA則以離子層析儀(IC)搭配IonPac CS18 2×250 mm層析管柱，線性回歸r值可高達0.9986， MDL值是0.00022 mg/L，準確度為102.19~98.42 %，精密度為0.63 %。 不論在冷藏環境中或是常溫狀態下，EG與DEA皆可至少保存7天，EG保存回收率約在±15 %以內，DEA則可以維持在±10 %以內。使用超純水當吸收液時EG的捕集效率可高達90~98 %，DEA在不同濃度下也有73~95 %的捕集效率。在實廠排放管道或是添加樣品方式模擬採樣，皆可有效的捕集且無破出現象產生。

This study is to develop a method for the determination of ethylene glycol (EG) and diethanolamine (DEA) from stack samplings. Both EG and DEA were sampled with impingers. The EG was analyzed using a GC-FID with a higher-polarity column (HP-INNOWAX). The r value of linear regression can be as high as 0.9991. The method detection limit (MDL) was 0.187 mg/L. The accuracy was 87.4~101.9 % and the precision was 3.8 %. On the other hand, DEA was analyzed using an ion chromatograph (IC) with IonPac CS18 2 x 250 mm chromatographic column. The r value of linear regression can be as high as 0.9986. The MDL was 0.00022 mg/L. The accuracy was 102.19~98.42 % and the precision was 0.63 %. No matter stored in a refrigerated environment or at room temperature, the EG preservation recovery was within ±15%, and that of the DEA could be maintained within ±10 %. Using ultrapure water as the sorbent, The capture efficiency of liquid EG could be as high as 90~98 %, while for DEA it was 73~95 %. In the factory stack discharge or for spike samples to simulate the sampling method, both results showed that the sampling of EG and DEA could be effectively complemented without breakthrough.