| 年轻地下水测年最新技术--SF6法 |
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| 引用本文： | 李晶晶, 周爱国, 刘存富, 蔡鹤生, 张俊刚, 毛绪美. 年轻地下水测年最新技术--SF6法[J]. 水文地质工程地质, 2005, (1): 94-97,120. doi: 10.3969/j.issn.1000-3665.2005.01.023 |
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| 作者姓名： | 李晶晶 周爱国 刘存富 蔡鹤生 张俊刚 毛绪美 |
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| 作者单位： | 中国地质大学环境学院,武汉,430074;; 中国地质大学(武汉) |
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| 摘 要： | SF6是一种无色、无嗅、无毒、不易燃的惰性气体,具有良好的绝缘性、灭弧性和散热性,广泛用于断路器和变压器的绝缘材料.电器设备的泄漏使得大气中SF6浓度增加很快,每年达7%,造成SF6的人工来源,此外还有天然来源.SF6通常用带电子捕获器(ECD)的气相色谱仪测定.SF6是一种新型的测定年轻地下水年龄的工具,特别适合研究1990年以后补给水的年龄.SF6年龄以亨利定律为基础计算.由于大气中SF6浓度逐年增加,比CFC测年法具有更大的优越性.
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| 关 键 词： | SF6 年轻地下水年龄 气相色谱仪(ECD) |
A new method in dating young groudwater : SF_6 method |
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| A new method in dating young groudwater: SF6 method[J]. Hydrogeology & Engineering Geology, 2005, (1): 94-97,120. doi: 10.3969/j.issn.1000-3665.2005.01.023 |
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| Authors: | LI Jing-jing ZHOU Ai-guo LIU Cun-fu CAI He-sheng ZHANG Jun-gang MAO Xu-mei |
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| Abstract: | SF_6 is a colorless,odorless,nonflammable,stable gas with excellent electrical insulating,arc-quenching and radiating properties.It is widely used as an electrical insulator in high-voltage switches and transformers.The revealment of electrical appliance cause concentration of SF_6 in air increased rapidly (about 7% per year),which induce anthropogenic SF_6. In addition natural source of SF_6 is also exist.Usually we measure SF_6 with gas chromatography and electron capture detector (ECD).SF_6 is a new tool of dating young groundwater,it is particularly useful in dating very young (post-1993) groundwater.Calculating of age is based on Henry's Law.Comparing with CFC method,SF_6 method has advantages owing to its high rate of increase in the atmosphere. |
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| Keywords: | SF_6 dating young groundwater gas chromatography (ECD) |
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