頁籤選單縮合
| 題 名 | 環境樣品中鉻金屬離子之超臨界二氧化碳流體萃取與分析 |
|---|---|
| 作 者 | 喻家駿; 吳頂立; | 書刊名 | 逢甲學報 |
| 卷 期 | 28 1995.11[民84.11] |
| 頁 次 | 頁181-195 |
| 分類號 | 460.025 |
| 關鍵詞 | 環境樣品; 鉻金屬離子; 超臨界; 二氧化碳流體; 萃取; 分析; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究分為三部分,第一是利用[2,4]-戊二酮(acac),三氟化[2,4]-戊二酮(tfa) , 及六氟化 [2,4]- 戊二酮 (hfa) 為螫合劑與 Cr �擗あX成 Cr(acac) �陛BCr(tfa) �陘� Cr(hfa) �偭惘X物,探討它們在 SF-CO �砟云熒遘悗蛂A。 第二是以 acac、tfa、hfa 等為 螫合劑溶於 SF-CO �砟丰H萃取濾紙中添加定量之鉻 (Cr ������ + 及 C �� ) 金屬離子做 回收率的探討。第三是以 acac 為螫合劑萃取土壤之鉻金屬離子含量,在回收率實驗中是以 acac 為螫合劑溶於 SF-CO �砟丰H萃取純土壤中添加定量之鉻離子( 1g 之土壤中添加 10 μ g 之 Cr �����妝� Cr �憿^做其回收率之探討。 |
| 英文摘要 | Three chromium complexes, Cr(acac)��, and Cr(hfa)�� were prepared. Studies showed that the solubility of the Cr(haf) �� complexes in SF-CO �� are significantly higher than the nonfluorinated analogues. The SFE experiments were conducted at 180atm and 80 ℃ with 10 μ g of Cr( Ⅲ ) or Cr( Ⅵ ) spiked on filter paper, three complexation agents (acac, tfa, hfa) were used to measure the extraction efficiency. Acetylacetone was found to have the highest recovery toward Cr( Ⅲ ) or Cr( Ⅵ ) extraction from filter paper. This was probaly due to the high formation constants between the reaction of chromium ion and acetylacetone. Under the experimental conditions (P=200atm, T=100 ℃ and 5% CH �� OH as modifier ), quantitative recovery of 10 μ g of the spiked Cr( Ⅲ ) or Cr( Ⅵ ) from soil samples by acetylacetone were obtained. |
本系統中英文摘要資訊取自各篇刊載內容。