不同种类燕麦和苦荞中的膳食纤维测定

采用酶- 重量法分析不同产地的15 种燕麦和苦荞中总膳食纤维(TDF)、可溶性膳食纤维 (SDF)及不溶性膳食纤维(IDF)的含量。对于燕麦，TDF 含量平均为12%，其中黑龙江的米燕麦、山西的73014-336、河北的小莜麦样品含量较多，而青海的玉麦-2、宁夏的固原燕麦和云南的德钦燕麦含量较低；黑龙江的米燕麦的SDF 含量明显高于其他燕麦；河北的小莜麦和山西的73014-336 中IDF 含量较高；国外的Bup-1809 燕麦的TDF、SDF、IDF含量都低于平均值。对于苦荞，TDF 含量平均为7%，四川的额洛木尔惹苦荞的含量最高，为9.64%；贵州的90-3 苦荞的SDF 含量最高，为3.45%；四川的额洛木尔惹苦荞和山西的蔓荞子苦荞中的IDF 含量较高。酶- 重量法测定植物中膳食纤维其重现性较好，不同产地、不同种类燕麦和苦荞中膳食纤维含量与组成差异较大。

Determination of Dietary Fibers in Different Kinds of Oat and Buckwheat

Contents of total, soluble and insoluble dietary fibers in oat and buckwheat from different resources were determined by enzymatic-gravimetric method. Average total dietary fiber (TDF) was 12% in oat. However, TDF in oat from Heilongjiang, Shanxi and Hebei was higher than 12%, and TDF in oat from Qinghai, Ningxia were lower than 12%. The content of soluble dietary fiber (SDF) in Miyanmai from Heilongjiang were the highest, and the content of insoluble dietary fiber (IDF) in Xiaoyoumai from Hebei and in 73014-336 oat from Shanxi was higher. TDF, SDF and IDF in imported Bup-1809 were lower han average value. TDF in buckwheat was 7%. TDF in Eluomuerre from Sichuan province were the highest, which was 9.64%; SDF in 90-3 buckwheat from Guzhou were the highest, which was 3.45%; IDF in Eluomuerre from Sichuan and Manqiaozi from Shanxi was higher. Repeatability of this method for analyzing contents and compositions of dietary fibers in different kinds of oat and buckwheat was excellent.