摘要
为有效辨别食用淀粉掺假,运用扫描电镜和稳定碳同位素比质谱技术对马铃薯淀粉中掺假玉米淀粉行为进行定性和半定量鉴别。根据马铃薯淀粉与玉米淀粉在颗粒超微形貌上的明显差别,运用扫描电镜清晰辨别出马铃薯淀粉中掺假的玉米淀粉颗粒。当玉米淀粉的掺假量大于10%时,根据二者在稳定碳同位素比上的自然显著差异,稳定碳同位素比法不仅能够定性鉴别马铃薯淀粉中的玉米淀粉掺假行为,而且依照给出的公式可以估算出掺假玉米淀粉的含量。本法可作为国内淀粉市场上产品质量监督的检测方法。
In order to distinguish the adulteration of edible starch, scanning electron microscope （SEM） and stable carbon isotope ratio （SCIR） analysis were used to qualitatively and semi-quantitatively identify the adulteration of maize starch in potato starch. Due to the difference in microscopic morphology between potato and maize starch granules, the adulterated maize starch granules can be easily distinguished from potato starch granules under SEM. Moreover, the SCIR technology can not only qualitatively discriminate the adulterated maize starch from potato starch, but also determine the content of adulterated maize starch at the condition of higher than 10%. This method can be used as product quality supervision of domestic starch market.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第22期332-335,共4页
Food Science
