摘要
以湿法消解为食品中重金属电化学检测的前处理技术，通过电化学实验确定湿法消解的最佳条件，使得食品样品在前处理过程中能够消解完全。结果表明，采用硝酸-过氧化氢湿法消解体系，加入10mL硝酸后无需放置预消解，在120～140℃范围内加热，加入10～15mL过氧化氢，样品可以消解完全。湿法消解食品样品，电化学检测消解液的相关系数为0．99，加标回收率为82％～115％。湿法消解作为食品样品前处理技术，能够消解完全，满足电化学检测的要求。
Wet digestion is used as the pre-treatment technology for the electrochemical detection of heavy metals in food, and the complete wet digestion condition of food sample is optimized by electrochemical experiments. The results show that the ex- perimental samples can be digested completely using the Nitric acid-hydrogen peroxide system and is not pre-digested after adding 10 mL nitric acid at 120-140℃ and adding 10-15 mL of hydrogen peroxide during the heating process. The correlation coefficient of electrochemical detect is 0.99 for digestion solution of the samples, and the recovery of standard addition is 82 % -115%. Wet digestion as a pre-treatment technology of food samples, It can digest sample fully and meet the requirements of electrochemical detection.
出处
《河北科技大学学报》
CAS
2015年第2期170-175,共6页
Journal of Hebei University of Science and Technology
基金
国家自然科学基金(21106033)
关键词
电化学分析
湿法消解
食品
前处理技术
重金属
electrochemical analysis
wet digestion
food
pre-treatment technology
heavy metal
