頁籤選單縮合
題名 | Measurement of Methane Emission from Soil=土壤甲烷釋出之測定 |
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作 者 | 張綉蘭; 楊盛行; | 書刊名 | 中國農業化學會誌 |
卷期 | 35:5 1997.10[民86.10] |
頁次 | 頁475-484 |
分類號 | 434.227 |
關鍵詞 | 甲烷釋出; 水稻田; 氣體色層分析; 積聚時間; Methane emission; Paddy soil; Gas chromatography; Accumulation time; |
語文 | 英文(English) |
中文摘要 | 氣體樣品中甲烷濃度可以氣體色層分析儀火焰離子化檢出器測定,其可檢出濃 度為體積濃度0.1至10,000 mg/L。甲烷濃度與層析譜之尖峰面積間有良好之直線關係(r □>0.99)。由回歸分析知,在兩年測定期間內九次測定值間並無顯著差異。在取樣之壓 克力罩內甲烷濃度在2小時內很穩定,其可用一次稀釋法,二次稀釋法和取代法取15~30分 鐘內樣品分析,如在壓克力罩下套上金屬底座則可以減少土壤攪動對甲烷釋出之影響。 |
英文摘要 | The methane concentration in gas samples could be determined over the range 0.1 to 10,000 mg/L by means of gas chromatography using the flame ionization detection. The methane concentration and the peak area of the chromatogram had a linear correlation (r□>0.99). From regression analysis, there was no significant difference among nine measurements during a 2-year test period. The methane concentration in the test acrylic chamber had good conservation properties for 2 h of incubation. Methane gas could be collected using one-step dilution, two-step dilution and replacement methods over 15 to 30 min accumulation times. An acrylic chamber with a metallic base could reduce the effect of disturbance on the soil methane emission. |
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