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首页> 外文期刊>Korean Journal of Food Science and Technology >Discriminating domestic soybeans from imported soybeans by 20 MHz pulsed NMR
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Discriminating domestic soybeans from imported soybeans by 20 MHz pulsed NMR

机译：通过20 MHz脉冲NMR区分国产大豆与进口大豆

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摘要

A 20 MHz pulsed NMR systems was employed to discriminate the geographical origin of soybeans and black beans (yak-kong) from Korea and foreign countries. Crude fat contents measured by soxhlet method were significantly (p<0.05) different between domestic and imported soybeans. Moisture and crude protein contents, measured by AOAC, were significantly different between domestic and imported black beans. In soybeans, values by solid fat content method and Carr-Purcell-Meiboom-Gill (CPMG) method using20 MHz pulsed NMR showed the significant difference among soybeans from various the geographical origins. In black beans (yak-kong), NMR values measured by NMR except T_1 SR pulse sequence revealed the significant difference by the geographical origins.The habitat of soybeans and black beans could be identified by canonical discriminant analysis of chemical composition with 70-91.7 percent accuracy. Low field NMR data followed by discriminant analysis, however, granted the 100 percent of accuracy for classification of soybeans.
机译：使用20 MHz脉冲NMR系统来区分韩国和国外的大豆和黑豆（y牛）的地理起源。用索氏提取法测得的粗脂肪含量在国产和进口大豆之间有显着差异（p <0.05）。通过AOAC测量的水分和粗蛋白含量在国产和进口黑豆之间存在显着差异。在大豆中，采用固体脂肪含量法和使用20 MHz脉冲NMR的Carr-Purcell-Meiboom-Gill（CPMG）法测得的值表明，不同地理来源的大豆之间存在显着差异。在黑豆（y牛）中，除T_1 SR脉冲序列外，通过NMR测得的NMR值在地理来源上显示出显着差异。可以通过对化学成分进行规范判别分析来鉴定大豆和黑豆的生境，占70-91.7％准确性。但是，通过低场NMR数据进行判别分析后，大豆分类的准确度达到了100％。

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