摘要
稻谷是我国最重要的粮食作物之一,其生长过程中对土壤中的镉有着极强的富集能力,为更好的利用镉超标稻谷,对比不同降镉工艺对稻谷中镉含量的影响,同时提出可行的降镉方法,本文对比监测了白米及蒸谷米加工过程中稻谷内部的元素含量变化情况,对比了不同处理工艺对稻谷中镉含量的影响,并对超声浸提降镉工艺进行了工艺参数优化,以期为开发稻谷新型降镉工艺提供数据支撑。结果表明,蒸谷米加工过程中的综合降镉率为40.89%,优于白米加工中33.36%的综合降镉率。经过对碾米期间的元素含量变化情况的相关性分析,结果表明大米内部的钙、铬、锰、铁、铜、锌六种元素在糊粉层中富集程度高。以降镉率为评价指标,通过单因素及响应面优化试验,对稻谷的超声浸提降镉工艺进行了优化,得到的最佳浸提工艺为浸提时间160 min,超声功率560 W,浸提温度53℃,在此条件下,糙米的降镉率为38.97%。
Rice is one of the most important food crops in China,it has strong ability to accumulate cadmium in the soil during its growth process.In order to make better use of cadmium-exceeding rice grains,compare the effects of different cadmium-reduction processes on cadmium content in rice grains,and also propose feasible cadmiumreduction methods,to provide data support for the development of a new cadmium-reduction process for rice grains,the changes of elemental content inside rice grains during the processing of rice and parboiled rice was compared and monitored,the effects of different treatment processes on cadmium content in rice grains was compared,and the process parameters of ultrasonic leaching cadmium-reduction process was optimized.The results showed that the integrated cadmium reduction rate during parboiled grain rice processing was 40.89%,which was better than the integrated cadmium reduction rate of 33.36%in rice processing.After the correlation analysis of the changes in elemental content during rice milling,the results showed that six elements of calcium,chromium,manganese,iron,copper and zinc within the rice were enriched in the paste flour layer to a high degree.With the cadmiumreduction rate as the evaluation index,the ultrasonic leaching cadmium-reduction process of rice was optimized by single-factor and response surface optimization tests,and the optimal leaching process obtained was 160 min leaching time,560 W ultrasonic power and 53℃leaching temperature,and the cadmium reduction rate of brown rice was 38.97%under these conditions.
作者
张玉荣
曹仁杰
靳馥嘉
赵欣欣
赵晓洲
张咚咚
ZHANG Yurong;CAO Renjie;JIN Fujia;ZHAO Xinxin;ZHAO Xiaozhou;ZHANG Dongdong(Engineering Research Center of Grain Storage and Security of Ministry of Education,Henan Provincial Engineering Technology Research Center on Grain Post Harvest,School of Food and Strategic Reserves,Henan University of Technology,Zhengzhou 450001;College of Food Science and Engineering,Henan University of Technology,Zhengzhou 450001;Zhejiang Zhuji Grain Collection and Storage Co.,Ltd.,Zhuji 311800)
出处
《中国食品添加剂》
CAS
北大核心
2023年第8期41-50,共10页
China Food Additives
基金
财政部和农业农村部国家现代农业产业技术体系资助项目(CARS-03)
中国科协第五届青年人才托举工程项目(2019QNRC001)
河南工业大学高层次人才科研基金项目(2019BS011)。
关键词
ICP-MS
稻谷加工
元素含量
超声浸提
降镉
inductively coupled plasma-mass spectrometry(ICP-MS)
rice processing
elemental content
ultrasonic extraction
cadmium-reduction
