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以氮气作载气, 在单台Agilent 6890N 气相色谱仪上运行ASTM D4815 和ASTM D5580 方法

Abstract: 描述了Agilent 6890N 气相色谱系统，在同一硬件配置情况上，能实现方法ASTM D4815 和D5580 的运行，以分析汽油中的氧化物和芳烃。此外，本方法使用氮气为载气，以替代氦气。由于在某些场所易于得到色谱级氮气，且价格便宜，有时宁愿选择氮气为载气。6890N 气相色谱系统使实验室效率明显提高，实验室操作费用降低。本应用概括了气相色谱硬件的详细配置，包括用于分析的柱子和仪器条件。详细描述了配置和方法的优化。本系统用若干个汽油样品验证，显示了保留时间和检测器响应的良好分析精密度。 An Agilent 6890N GC system is described that allows both ASTM methods D4815 and D5580 to be run on single hardware configuration for the analysis of oxygenates and aromatics in gasoline. Additionally, the methods were implemented with nitrogen instead of helium as the carrier gas. Nitrogen is sometimes preferred because it is cheaper and easier to obtain in chromatographic grades in some locations. The 6890N based system offers a significant improvement in laboratory efficiency and a reduction in laboratory operating expenses. This paper outlines the details of the GC hardware including columns and instrument conditions for performing these analyses. Set-up and optimization of the methods is described in detail. The system was then extensively tested with several gasoline samples and was shown to give excellent analytical precision for both retention time and detector response

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