本研究制备了铜-凹凸棒石粘土（凹土）（Cu -ATT）、锌-凹土（Zn -ATT）、铁-凹土（Fe-ATT）催熟材料，通过电感耦合等离子体质谱（ICP-MS）、x射线衍射（XRD）、扫描电子显微镜（SEM）、透射电镜（TEM）对其金属元素组成及微观结构形貌进行分析表征，利用氢火焰气相色谱仪、ICP-MS 对酒样主要香味成分及金属含量进行分析。结果表明，与对照样相比，Cu-ATT、Zn-ATT酒样中乙酸乙酯、己酸乙酯含量增加，乙酸、己酸含量减少，与白酒自然老熟的酸与酯类变化不一致，并且酒样风味不良，金属元素溶出较多。而Fe-ATT酒样中乙酸乙酯、己酸乙酯含量减少，乙酸、己酸含量增加，与白酒自然老熟成分变化基本一致，酒样窖香纯正，酒体协调，丰满、味净，Fe元素溶出量较少，催熟作用显著。Fe-ATT白酒催熟效果是否与Fe元素的引入有关有待进一步研究。

Copper-attapulgite (Cu-ATT), zinc-attapulgite (Zn-ATT), and iron-attapulgite clay (Fe-ATT) composites were developed for artificial aging of Luzhou-flavor liquor. The compositions of metallic elements and microstructural morphology of these composites were characterized by inductively coupled plasma mass spectroscopy (ICP-MS), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The flavor components and metal content of liquor samples were analyzed using gas chromatography-flame ionization detection (GC-FID) and ICP-MS. The results showed that Cu-ATT and Zn-ATT samples exhibited an increase in ethyl acetate and ethyl caproate content and a decrease in acetic acid and hexanoic acid content compared with the control samples. However, this is inconsistent with known changes in the content of acids and esters in naturally-aged liquor. In addition, flavor of these liquor samples was unpleasant, with a high concentration of metallic elements detected. On the other hand, Fe-ATT liquor sample exhibited decreased content of ethyl acetate and ethyl caproate, with increased content of acetic acid and hexanoic acid, which is consistent with known changes in the components of naturally-aged liquor. Furthermore, Fe-ATT liquor sample exhibited pure flavor, a full and well-balanced body, and a clean taste. Additionally, the Fe concentration detected was low and the aging effect was significant. Further investigation is required to ascertain whether the aging effect of Fe-ATT is associated with introduction of Fe element.

江苏省科技支撑计划（BE2012111）