ガスクロマトグラフ用圧力計に基因するゴーストピークとその除去法

概要

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Oxygen and nitrogen peaks appear as the ghost peaks in gas chromatographic analysis of high purity gas. The ghost oxygen and nitrogen are originated from the small quantity of air in the bourbon tube of the pressure gauge.<BR>As a very small amount of air is injected into carrier gas by pressure change with sampling cock operation, the ghost peaks have the same retention times respectively with oxygen and nitrogen in sample.<BR>It was demonstrated that a new type pressure gauge having a carrier gas channel in the bourbon tube eliminated the ghost peaks and shortened stabilization time. It is illustrated in Fig. 3 and is called the scavenge pressure gauge.
社団法人日本分析化学会の論文