食品科学 ›› 2010, Vol. 31 ›› Issue (22): 332-335.doi: 10.7506/spkx1002-6630-201022072

• 分析检测 • 上一篇    下一篇

扫描电镜和稳定碳同位素比质谱法鉴别马铃薯淀粉中的掺假玉米淀粉

王绍清,武士奎,穆同娜,曹 红,曹宝森   

  1. 国家食品质量安全监督检验中心
  • 收稿日期:2009-09-21 修回日期:2010-06-29 出版日期:2010-11-25 发布日期:2010-12-29
  • 通讯作者: 王绍清 E-mail:wwwshq@yahoo.cn

Detection of Adulterated Maize Starch in Potato Starch by Scanning Electron Microscope and Stable Carbon Isotope Ratio Analysis

WANG Shao-qing,WU Shi-kui,MU Tong-na,CAO Hong,CAO Bao-sen   

  1. China National Food Quality and Safety Supervision and Inspection Center, Beijing 100094, China
  • Received:2009-09-21 Revised:2010-06-29 Online:2010-11-25 Published:2010-12-29
  • Contact: WANG Shao-qing E-mail:wwwshq@yahoo.cn

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。

关键词: 食品掺假, 马铃薯淀粉, 玉米淀粉, 超微形貌, 扫描电镜(SEM), 稳定碳同位素比(SCIR)

Abstract:

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.

Key words: food adulteration, potato starch, maize starch, microscopic morphology, scanning electron microscope (SEM), stable carbon isotope ratio (SCIR)

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