基于电子仿生学的玛咖粉鉴伪  

Study on authenticity of Maca (Lepidium meyenii) powder based on electronic bionics

作　　者：党艳婷 李爱民 苑鹏[1] 夏凯 刘士伟[1] 刘亚旭 赵可心 周文萱 段盛林[1] 温霖 

机构地区：[1]中国食品发酵工业研究院,北京100015 [2]江南大学生物工程学院糖化学与生物技术教育部重点实验室,江苏无锡214122 [3]新时代健康产业(集团)有限公司,北京102206

出　　处：《食品与发酵工业》2017年第12期169-175,共7页Food and Fermentation Industries

基　　金：国家重点研发计划<现代食品加工及粮食收储运技术与装备>中"薯类主食化加工关键新技术装备研发及示范项目"中"薯类主食化技术提升与装备研发"课题(2016YFD0401303);北京市科技重大专项<马铃薯主食加工装备研究及特膳食品开发项目>(D171100001917003)

摘　　要：为鉴别玛咖粉的真伪文中运用台式能谱扫描电镜观察了玉米粉、萝卜粉、蔓菁粉和玛咖粉颗粒的微观形态,并对玛咖粉和蔓菁粉的元素组成进行了分析测试。结果表明,萝卜粉、玉米粉与玛咖粉形态差异明显,蔓菁粉与玛咖粉微观形态最相近,但表观也有区别,同样可以进行玛咖粉的真假鉴伪;由X射线能谱分析结果可知,若被测样品中N元素质量比接近(43.75±0.79)%,O元素质量比接近(29.92±0.74)%,可初步推定该样品为纯玛咖粉;否则被测样品为疑似掺蔓菁粉的假玛咖粉。同时运用电子鼻对掺有蔓菁粉的玛咖粉进行鉴别。结果表明,掺不同蔓菁比例的玛咖粉气味指纹图谱呈现一定的规律性,电子鼻能够有效鉴别掺蔓菁的玛咖粉,还可以大致确定掺假的比例区间;此外通过统计质量控制(statistical quality control,SQC)分析模型可以实现原料和产品的质量控制。In recent years,Chinese Maca industry has been development rapidly,experienced with price dramatically fluctuating. When Maca held at high price,the powder of corn flour,radish powder and turnip powder were adulated into commercial Maca powder and authenticity of Maca powder became a severe question. This study uses desktop scanning electron microscopy（ SEM） to observe the microstructures of corn flour,radish powder,turnip powder and Maca powder. The result illustrated that radish powder and corn flour were evidently different from the micro-morphology of Maca powder. Turnip powder was the closest to Maca powder,but there were still apparent differences. By X-ray energy spectrum analysis,the result showed： if N and O element mass ratio were close to（ 43. 75 ± 0. 79） %and（ 29. 92 ± 0. 74） % respectively,the sample was considered pure Maca powder preliminarily; otherwise it was suspected to fake Maca powder. Meanwhile,electronic nose was used to detect Maca powder with different proportions of turnip powder. The results showed a certain regularity of adulteration in Maca powder flavor fingerprints. Electronic nose could effectively identify the authenticity of Maca powder,and roughly calculated the proportional range of adulteration. In addition,statistical quality control（ SQC） analysis model can be used to control the raw materials and final products quality.

关 键 词：玛咖粉 蔓菁粉 鉴伪 台式扫描电镜 电子鼻 统计质量控制(statistical quality control SQC)分析 

分 类 号：TS207.3[轻工技术与工程—食品科学]