摘要
为了给镉污染的水稻提供新的利用途径。该文初步研究了水、氢氧化钙、氢氧化钠、柠檬酸溶液对大米淀粉中镉的脱除效率,利用扫描电镜观察判断淀粉的损伤程度,最后用脱镉淀粉进行复配,通过双螺杆挤压机制得了挤压重组米,并利用酸水解法、质构仪分析了重组米饭的理化性质。结果表明柠檬酸是一种较好的大米镉去除剂。以脱镉大米淀粉为原料制备的重组米品质得到改善,耐酸性提高。重金属污染大米经过加工可以成为一种品质更好、价值更高的主食。
In order to provide a new utilization method for cadmium-contaminated rice,a preliminary study of the removal of rice starch cadmium by water,calcium hydroxide,sodium hydroxide and citric acid was conducted,the damage degree of starch was compared by SEM,and then the recombinant rice was obtained by a twin-screw extruder using the starch which met the safety standard.The physical and chemical properties of recombinant rice were analyzed by acid hydrolysis and texture analyzer.The results showed that citric acid was a good rice cadmium removal agent.The quality of recombinant rice prepared from cadmium-removed rice starch was improved;the acid resistance was increased.Heavy metal contaminated rice can be a staple food with better quality and higher value through processing.
作者
陶湘林
庞敏
郭晋琦
魏颖娟
吴跃辉
唐汉军
TAO Xiang-lin;PANG Min;GUO Jin-qi;WEI Ying-juan;WU Yue-hui;TANG Han-jun(Research Team of Crop Starch Chemistry and Metabonomics,Hunan Academy of Agricultural Sciences,Changsha 410125,PRC;Hunan Institute of Agricultural Product Processing,Changsha 410125,PRC;College of Longping,Graduate School of Hunan University,Changsha 410125,PRC)
基金
湖南省重点领域研发计划(2019NK2121)
湖南省农科院创新基金(2018ZD 04-1-2)。
关键词
脱镉
大米淀粉
扫描电镜
质构
耐酸性
Cadmium removal
Rice starch
SEM
Texture
Acid resistance
