DISSOLVED-OXYGEN AND METHANE IN WATER BY A GC HEADSPACE EQUILIBRATION TECHNIQUE
DISSOLVED-OXYGEN AND METHANE IN WATER BY A GC HEADSPACE EQUILIBRATION TECHNIQUE
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DOI：
10.1080/03067318908026878
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发表时间：
1989-01-01
影响因子：
2.6
通讯作者：
VANDEGRIFT, SA
中科院分区：
文献类型：
--
作者：
KAMPBELL, DH;WILSON, JT;VANDEGRIFT, SA
介绍了一种测定地下水样品中溶解氧和甲烷的分析方法。该方法包括在充满水的瓶中产生氦气顶空，并通过气相色谱法分析顶空。其他永久性气体如氮气和挥发性脂肪烃如乙烷、丙烷和丁烷也可以进行分析。也可以对样品进行BTX分析。氧气的检测限为0.1 mg/l，甲烷的检测限为0.002 mg/l。线性回归系数R2= 0.998，表明Winkler滴定法和气相色谱-顶空平衡技术用于氧分析之间具有良好的一致性。当在4°C下储存30天而不使用盐酸保存时，一些现场样品中的氧气被大大耗尽。
An analytical procedure is described for the determination of dissolved oxygen and methane in groundwater samples. The method consists of generating a helium gas headspace in a water filled bottle, and analysis of the headspace by gas chromatography. Other permanent gases such as nitrogen, and volatile aliphatic hydrocarbons such as ethane, propane, and butane could also be analyzed. BTX analyses could also be done on the sample. Detection limit for oxygen was 0.1 mg/l and 0.002 mg/l for methane. Good agreement was shown between Winkler titration and the GC-Headspace Equilibration Technique for oxygen analyses by a linear regression coefficient,R2= 0.998. Oxygen was greatly depleted in some field samples when they were stored for 30 days at 4°C without hydrochloric acid preservation.