摘要
研究了微分电位溶出技术测定蔬菜干制品中铜含量新的测定方法,对影响检测结果的底液 pH值、沉积电位、平衡电位、沉积时间、平衡时间等参数进行了优化。通过实验结果表明,铜的线性测定范围为0～1600 ng,相关系数r=0.9976,铜的检出限为0.85 ng/mL。该法测定蔬菜干制品中铜含量的结果与石墨原子吸收法无显著差异。
A new method for detecting copper content in dried vegetables by quadratic differential potentiometric stripping is studied.Experimental parameters are optimized,such as pH values,deposition potential,equilibrium potential,deposition time,equilibrium time.The peak data are linear with the concentration in the range from 0 ng to 1600 ng;the correlation coefficient r is 0.9976;the detection limit is 0.85 ng/mL.The result of this method has no significant difference with that of GFAAS.
出处
《中国调味品》
CAS
北大核心
2014年第8期104-105,114,共3页
China Condiment
基金
河南省2007年重点科研攻关项目(072102320020)
关键词
微分电位溶出
蔬菜干制品
铜
检测
differential potentiometric stripping
dried vegetables
copper
detection
