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气相色谱中,组分的定性是采用单位固定液重量的保留体积V_g 值来表示的。即式中g 为固定液的重量,V_R 为保留体积。由于在一定的条件下V_g 值仅决定于物质的性质,因此在色谱分析中,就用它作为组分的定性指标,为了不用纯物质的校正,即可预测未知物的结构,人们常常在一定的条件下研究各物质的V_g 值的互相联系,或在不同的条件下研究同一的物质的V_g 值的內在联系,以便通过这些关系来辨别未
In gas chromatography, the qualitative characterization of the components is expressed in terms of the retention volume V_g per unit weight of fixative. That is where g is the weight of the fixative and V_R is the retention volume. Since the V_g value depends only on the nature of the material under certain conditions, it is used as a qualitative indicator of the composition in chromatographic analysis. In order to predict the structure of an unknown material without the correction of a pure substance, Under the conditions of each material V_g value of the interrelationship, or under different conditions, the same substance V_g value of the internal relations, so that through these relations to identify