五种昆虫脂肪酸组分与含量分析

采用了索式提取法提取了5种昆虫的脂肪,5种昆虫粗脂肪含量分别为其干重的10.03%,13.41%,25.53%,19.05%和21.32%。并用气相色谱法分析了5种昆虫脂肪酸的组成和含量。结果显示,5种昆虫都富含不饱和脂肪酸即油酸、亚油酸、亚麻酸,在脂肪总量中该3种不饱和脂肪酸的含量分别为油葫芦Gryllus testaceus77.22%、烟夜蛾Heliothis assulta71%、灰斑古毒蛾Orguia ericae67.9%、银纹夜蛾Argyrogramma agnata57.14%、白薯天蛾Herse convolvuli56.17%,特别是昆虫脂肪中亚麻酸的含量明显高于日常食用动植物油脂。研究结果表明昆虫脂肪酸组成和含量非常适于食用和药用,是极好的脂肪酸源。

Fatty acid composition and contents of five insect species

Fats of five insect species, Gryllus testaceus, Orguia ericae, Heliothis assulta, Argyrogramma agnata and Herse convolvuli were extracted using the Soxhlet extractor. The fatty acids composition and content of these five species were analyzed by gas chromatography. The ratios of the crude fats on a dry basis in the five insects species were 10.03%, 13.41%, 25.53%,19.05% and 21.32%, respectively and the relative amounts of unsaturated fatty acids to their total amount of the fats were 77.215% for G. testaceus, 70.996% for H. assulta, 67.904% for O. ericae, 57.143% for A. agnata, and 56.171% for H.convolvuli, respectively. Especially the percentages of linolenic acid in the crude fats of five insects were obviously higher than dietary oil from plants or animals. The results indicated that insect fatty acids could be a new resource for food or medicine.