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首页> 外文会议>Annual ISA Analysis Division symposium >On-Line Analysis of Volatile Organics in Water Using Head Space Gas Chromatography: Evaluation of Five Head Space Techniques
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On-Line Analysis of Volatile Organics in Water Using Head Space Gas Chromatography: Evaluation of Five Head Space Techniques

机译：顶空气相色谱在线分析水中的挥发性有机物：五种顶空技术的评估

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摘要

Many industrial effluent streams require monitoring for volatile organic carbon (VOC) at part per billion concentration levels. Head-space gas chromatography (GC) is a suitable on-line technique for this analysis (the VOCs are stripped from the water prior to analysis by GC). This paper evaluates five dynamic head-space systems for sensitivity, linearity, response time and simplicity. One of the head-space systems is commercially available while the other four systems were fabricated in house. The thin-film head-space (TFHS) design was selected as the best design for Dow Sarnia applications. This head-space system along with the associated sample system will be discussed in greater detail. The TFHS system can easily measure VOCs at the 50 ppb concentration level, has a response time of less than five min. and requires less than 4 hours per week routine maintenance.
机译：许多工业废水需要以十亿分之一的浓度水平监测挥发性有机碳（VOC）。顶空气相色谱法（GC）是一种适用于此分析的在线技术（在通过GC分析之前将VOC从水中汽提）。本文评估了五个动态顶空系统的灵敏度，线性，响应时间和简便性。其中一个顶空系统是可商购的，而其他四个系统是在内部制造的。薄膜顶空（TFHS）设计被选为陶氏Sarnia应用的最佳设计。将更详细地讨论此顶空系统以及相关的样本系统。 TFHS系统可以轻松测量浓度为50 ppb的VOC，响应时间不到5分钟。并且每周需要少于4个小时的例行维护。

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