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测定汽油中含氧化合物的ASTM D4815分析仪操作性能和精确度的改进

Abstract: 美国材料与试验协会(ASTM) D4815 标准方法被广泛应用于汽油中含氧化合物的测定。该方法为一种二维气相色谱法，即在毛细柱分析分离之前，先采用微填充预柱将烃类从含氧化合物中分离以消除其干扰。本应用研究描述了对预柱系统所做的改进，这些改进使分析方法更易于使用、操作更精确；展示了基于Agilent 6890 系列气相色谱平台并采用新型色谱柱所开发的分析仪，该分析仪可以满足或优于美国材料与试验协会关于D4815 标准方法的性能指标。 American Society for Testing and Materials method D4815 is widely used for the analysis ox oxygenated additives in gasoline. This two-dimensional gas chromatographic method uses a micro-packed precolumn to separate hydrocarbon interference from teh oxygenated compounds prior to analytical separation on a capillary column. This application note describes improvements made to the precolumn assembly that results in a method that is easier to use and more precise in operation. Analyzers built on the Agilent 6890 Series gas chromatograph platform include this new column and are shown to meet or exceed American Society for Testing and Materials performance specifications for the D4815 method.

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