采用顶空吸附萃取法(headspace sorptive extraction,HSSE)建立了小麦中部分风味物质的分析方法.以硅橡胶为原料,采用溶胶-热空气硫化法,在模具中定型制得硅橡胶萃取棒.萃取棒的硅橡胶层体积约为87 μL,热稳定性好,耐热温度达到390℃.萃取棒吸附的风味物质经自制热解吸装置热脱附,被吹扫进入气相色谱仪进行分析.考察了萃取温度及时间、相比、热解吸条件对该方法萃取效率的影响.在优化条件下分析小麦粉标准样品,结果表明:方法的线性关系良好(r＞0.997 9),检出限为0.09 ～1.00 μg/kg,标准物质的平均添加回收率为95％ ～121％,相对标准偏差在2.2％～7.8％之间.对小麦粉实际样品进行分析,采用外标法得到了7种风味物质的绝对含量.该方法简便快捷,检出限低,适用于小麦中风味物质的快速定量分析.
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