摘要
研究稻谷加工工艺(砻谷、碾米)与稻谷镉去除率的关系,明确通过砻谷、碾米工艺获得大米镉含量达标的可能性,为制定镉超标稻谷的加工利用技术提供科学依据。以不同镉含量的稻谷为材料,通过砻谷、碾米获得不同加工精度的大米;使用微波消解-石墨炉原子吸收光谱法检测其镉含量,分析稻谷在砻谷、碾米过程中镉含量的动态变化。结果表明:1)稻谷经砻谷加工后镉含量降低;镉含量低于0.226 mg/kg的稻谷,通过砻谷获得镉含量达标(0.2 mg/kg)的糙米。2)碾米加工可降低大米的镉含量,当碾米精度为23.83%时对镉的去除效果最佳;镉含量低于0.288 mg/kg的糙米,通过碾米获得镉含量达标的大米。3)镉含量高于0.323 mg/kg的稻谷,应考虑其他加工途径去除或降低大米或产品的镉含量。
The aim of this paper is determine the relationship of hulling, milling process and cadmium （Cd） re- moval rate in rice, study the feasibility of get low Cd concentration rice products, to provide the scientific basis for Cd contaminated rice processing and utilization technology. Use various Cd contaminated rice as experimental material, hulling and milling the rice sample, detecting the Cd concentration of rice products the by microwave digest-inductively coupled graphite furnace atomic absorption spectrophotometry （GFAAS）, discussing the dynamic variation rule rice prod- ucts Cd concentration in hulling and milling process. This study indicates： （1）Cd concentration in rice decreased after hulling process, paddy Cd concentration lower than 0.226 mg/kg can produce brown rice Cd concentration lower than 0.2 mg/kg（National Food Safety Standards）. （2） Milling process can reduce Cd concentration in rice products, removal effi- ciency achieve optimal when milling degree get to 23.83%. Brown rice Cd concentration lower than 0.288 mg/kg can pro- duce rice product Cd concentration lower than 0.2 mg/kg（National Food Safety Standards）.
出处
《中国食品学报》
EI
CAS
CSCD
北大核心
2015年第3期146-150,共5页
Journal of Chinese Institute Of Food Science and Technology
基金
国家自然科学基金项目(31201457)
农业部农业行业标准制定与修订项目(2011-403)
关键词
稻谷
砻谷
碾米
大米
镉
paddy
hulling
milling
rice
cadmium
