Study on rapid detection of irradiated rice based on RVA profile  

作　　者：MEI Shufang FU Junjie ZHOU Xiyao XU Furong ZHAO Xiaojun 

机构地区：[1]Institute of Nuclear Agricultural Sciences, Zhejiang University [2]Jinhua Polytechnic College

出　　处：《Nuclear Science and Techniques》2013年第4期32-37,共6页核技术（英文）

基　　金：Supported by Special Funds for Agro-scientific Research in the Public Interest(No.201103007)

摘　　要：In order to confirm whether the rice sample was exposed to gamma radiation,the changes in starch pasting viscosity of rice irradiated by different absorbed doses with additive acid solution and distilled water were investigated.The peak viscosity of irradiated rice sample was significantly decreased with the increment of absorbed doses even for the samples stored over 360 days.Irradiation samples can be distinguished from non-irradiated samples by their RVA profile as in the acid solution(pH=2.5),the starch pasting viscosities of irradiated rice samples were apparently higher while the starch pasting viscosities of non-irradiated rice samples were lower than that in distilled water(pH=7.0).The irradiation absorbed dose can be estimated accurately by the regression equation constructed with peak viscosity and absorbed doses.In order to confirm whether the rice sample was exposed to gamma radiation,the changes in starch pasting viscosity of rice irradiated by different absorbed doses with additive acid solution and distilled water were investigated.The peak viscosity of irradiated rice sample was significantly decreased with the increment of absorbed doses even for the samples stored over 360 days.Irradiation samples can be distinguished from non-irradiated samples by their RVA profile as in the acid solution（pH=2.5）,the starch pasting viscosities of irradiated rice samples were apparently higher while the starch pasting viscosities of non-irradiated rice samples were lower than that in distilled water（pH=7.0）.The irradiation absorbed dose can be estimated accurately by the regression equation constructed with peak viscosity and absorbed doses.

关 键 词：RVA谱 大米 辐照 快速检测 峰值粘度 吸收剂量 淀粉糊化 回归方程 

分 类 号：S511[农业科学—作物学] TL99[核科学技术—核技术及应用]