市售进口Camembert干酪的游离脂肪酸和挥发性风味物质对比研究

分别采用气相色谱-质谱(gas chromatography-mass spectrometry,GC-MS)法和顶空固相微萃取(headspace solid phase microextraction,HS-SPME)-GC-MS法对6种不同品牌的市售Camembert干酪的游离脂肪酸和挥发性风味化合物进行比较分析。结果表明:6种市售进口Camembert干酪中的游离脂肪酸种类是一致的,肉豆蔻酸、棕榈酸、亚油酸和硬脂酸是水解生成量较多的游离脂肪酸,且6种样品的总游离脂肪酸含量差异不显著;6种样品所含的挥发性风味化合物含量存在显著性差异,其中样品FRA1和FRA2的羧酸类化合物含量最高,而其他4种样品的酮类化合物含量较高,这可能与干酪的成熟度有关;感官评价结果表明,样品FRA1和FRA2的单项感官指标评分和总体评分均较低,其他4种干酪得分无显著性差异。

Comparison of Free Fatty Acids and Volatile Flavor Compounds of Six Brands of Imported Camembert Cheese in China

The free fatty acid and volatile flavor compositions of six brands of imported Camembert cheese in China were measured comparatively by gas chromatography-mass spectrometry (GC-MS) and headspace solid phase microextraction (HS-SPME) combined with GC-MS. The results showed that all analyzed samples had an identical free fatty acid composition, myrisitc, palmitic, linoleic, and stearic acid being the major ones and no significant difference among the total free fatty acid contents of the six samples was found. On the other hand, a significant difference was noted in the contents of volatile flavor compounds, the samples FRA1 and FRA2 containing the highest contents of carboxylic acids while the remaining samples having higher contents of ketone compounds, which may be related to the maturity of cheese. Sensory evaluation of FRA1 and FRA2 showed lower scores for sensory attributes and overall quality, while the other four samples showed no significant difference.