Separation analysis of organic solvent is needed in working environment analysis. In organic solvents, there are various organic compounds, so it is difficult to select which absorbents are good for each separations. It is good for the selection of absorbents to refer to “Gas Chromatographic Retention Data”. Separation analysis of solvents is needed in environmental studies; however, choosing a packing material to be able to separate all organic components is difficult. It is recommended that selection may be made by consulting literature on the subjects, e.g. ‶Gas Chromatographic Retention Data", from which the figurers in Table 1 have been taken. GL Sciences supplies 2 types of packing for solvent analysis, BX-10 and BX-100. BX-10 gives the best separation for solvent analysis, and good peaks even for quantification of trace amounts of alcohols. However, it is not suitable for samples containing water or air (Fig. 2). BX-100 is suitable for trace analysis of solvents in air, and the analysis can be carried out without any risk of air causing Oxidative decomposition. Its mechanical strength and maximum operating temperature are lower (Fig. 4). Porous polymers are often used in solvent analysis. Gaskuropack 54, for example, is suitable for analysis of organic solvents in water or air (Fig. 5). Gaskuropack 55 is suitable for trace analysis of polar substances, but not for injection of large quantities of water or air (Fig. 6). In addition, Unisole 30T with its wide field of applications can be used for solvents analysis (Fig. 7). Unisole F-200 is used for separation of low free fatty acids. It may also be suitable for analyzing solvent traces in water giving ghost peaks (Fig. 8). The retention times of main solvents measured using above 7 types of stationary phases columns are listed in the Retention Index Table as below, please refer it.