食品科学 ›› 2017, Vol. 38 ›› Issue (14): 181-186.doi: 10.7506/spkx1002-6630-201714028

• 工艺技术 • 上一篇    下一篇

响应面法优化柠檬酸去除香菇中镉工艺

胡静,孙君社,谭晓妍,胡绍峰,秦子芳,宁慧娟,张秀清   

  1. (1.中国农业大学食品科学与营养工程学院,北京 100083;2.农业部规划设计研究院,北京 100125)
  • 出版日期:2017-07-25 发布日期:2017-09-06
  • 基金资助:
    国家自然科学基金面上项目(21576142);中国农业大学基本科研业务费项目(2017SP001)

Removal of Cadmium from Lentinus edodes Using Citric Acid: Optimization of Processing Conditions Using Response Surface Methodology

HU Jing, SUN Junshe, TAN Xiaoyan, HU Shaofeng, QIN Zifang, NING Huijuan, ZHANG Xiuqing   

  1. (1. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China;2. Chinese Academy of Agricultural Engineering, Beijing 100125, China)
  • Online:2017-07-25 Published:2017-09-06

摘要: 为降低香菇中重金属镉的含量,本实验以干香菇为原料,采用柠檬酸为洗脱剂去除香菇中的重金属镉,并对去除方法进行优化。通过单因素试验和响应面优化方法,分析柠檬酸浓度、pH值和转速对香菇中镉去除率的影响。结果表明,采用柠檬酸作为洗脱剂,在浓度0.32?mol/L、pH?5.0、30?℃、转速70?r/min条件下,香菇中镉的去除率达到最大,为57.0%,去除后香菇中镉残留量最高为0.41?mg/kg,低于国家限量标准0.5?mg/kg。同时采用该方法处理后,香菇中多糖及蛋白质含量损失少,较好地保留了香菇中的营养成分。该方法对降低香菇中镉的残留具有一定的应用参考价值。

关键词: 香菇, 镉, 柠檬酸, 响应面

Abstract: The removal of the heavy metal cadmium in dried Lentinus edodes using citric acid content was optimized using a combination of one-factor-at-a-time method and response surface methodology. The removal efficiency of cadmium was investigated as a function of three independent variables: citric acid concentration, pH and rotation speed. It turned out that the maximum removal rate of cadmium of 57.0% was obtained under the following optimized conditions: citric acid concentration 0.32 mol/L, pH 5.0, and rotation speed 70 r/min. After the treatment, the maximum residual cadmium content was 0.41 mg/kg, lower than the national limit of 0.5 mg/kg. Meanwhile, low losses of polysacccharides and proteins were observed suggesting good retention of nutrients in L. edodes. The proposed method could have a high application potential for reducing residual cadmium in L. edodes.

Key words: Lentinus edodes, cadmium, citric acid, response surface methodology

中图分类号: