热裂解气相色谱-质谱法测定葡萄干提取物的热裂解产物

50g葡萄干用70%乙醇溶液300mL在80℃回流提取3h,提取两次,过滤提取物,滤液减压浓缩至干。残渣用5200裂解仪在400℃,500℃,600℃,800℃下处理,在各裂解温度下得到的裂解产物导入仪器进行气相色谱-质谱分析。结果表明:主要裂解产物是糠醛、呋喃甲醇、5-甲基糠醛、5-羟甲基-2-呋喃甲醛、2,3-二氢-3,5-二羟基-6-甲基-4H-吡喃酮,这些裂解产物是赋予卷烟具有独特香味和较好口感的重要物质。

Determination of Pyrolytic Products of Extract of Raisin by Py-GC-MS

50 g of raisin were extracted twice by refluxing with 300 mL of 70% ethanol at 80 ℃ for 3 h.The extracts were filtered and the filtrate was evaporated to dryness under reduced pressure.The residue was treated with Pyroprobe 5200 at 400 ℃,500 ℃,600 ℃ and 800 ℃,the pyrolytic products obtained at each of the pyrolytic tempuratures were introduced into the instrument and analyzed by GC-MS.It was shown that the main pyrolytic products obtained were furfural,2-furanmethanol,5-methyl-2-furancarboxaldehyde,5-hydroxymethyl-2-furancarboxaldehyde,and 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one.These pyrolysates are the important substances to make cigarettes to have distinctive fragrance and better taste.