用2-乙基正丁酸为内标物,提出用气相色谱-质谱联用全扫描法测定豉香型白酒中β-苯乙醇和在特定保留时间窗内选择性离子法测定庚二酸二乙酯、辛二酸二乙酯和壬二酸二乙酯含量.此方法对β-苯乙醇的检出限(S/N=3)为5.0 mg·L-1,对其他3种二元羧酸的二乙酯的检出限均为0.01 mg·L-1,测得方法的回收率在90%~110%之间,相对标准偏差(n=10)均小于9%.

Gas chromatography in hyphenation with mass spectrometry (GC-MS) was applied to the determination of β-phenylethanol and diethyl esters of three dicarboxylic acids,namely diethyl heptanedioate,diethyl octanedioate and diethyl nonanedioate,in “Chi”-flavoured white spirit. In the GC-MS analysis,2-ethyl-butanoic acid was used as internal standard,and full scanning method was used for determination of β-phenylethanol and selective ion monitoring mode was used for determination of diethylesters at difinite retention time. Detection limit (S/N=3) of the method were found to be 5.0 mg·L-1 for β-phenylethanol,and 0.01 mg·L-1 for all the 3 diethyl esters. Values of recovery obtained were in the range of 90%-110%,and values of RSD′s (n=10) were less than 9%.