摘要
文章研究在硫酸介质中，利用铜催化过氧化氢氧化甲基橙和亮绿褪色的反应体系.探讨该褪色指示反应的最佳实验条件，在此基础上建立高灵敏度测定痕量铜的动力学分析新方法.通过对该反应催化体系和非催化体系吸光度的测定，确定该体系的最大吸收峰位于波长510 nm和640 nm处.工作曲线的线性范围：0.100～2.00μg/25mL.检出限：3.64×10^-9 g/mL，相对标准偏差：1.2%.本方法体系稳定，灵敏度高，选择性好，用于亳州道地药材中痕量铜的测定，结果较为满意.
This thesis studies on a system of oxidation fading reaction among hydrogen peroxide,methyl or-ange and brilliant green in the sulfuric acid medium. Under the best experimental conditions of the reaction discussed,a new kinetic analysis for trace copper with high sensitivity is established. A result shows that the maximum absorption peak lies at 510 nm and 640 nm respectively by means of absorbance deteriminaton in the catalytic and non-catalytic systems. The linear range of the working curve of this method is 0.100~ 2.00μg/25mL. The detection limit is 3.64 ＆#215; 10-9g/mL. The relative standard deviation is 1.2%. With highly stabili-ty,sensitivity and selectivity,the determination of trace copper can apply to genuine regional Chinese herb medicines in Bozhou,with satisfactory results.
出处
《淮北师范大学学报（自然科学版）》
CAS
2014年第1期30-33,共4页
Journal of Huaibei Normal University：Natural Sciences
基金
安徽省教育厅自然科学基金(KJ2012z260)
关键词
铜
双指示剂
催化光度法
甲基橙
亮绿
中药材
copper
dual-indicator
catalytic spectrophotometry
methyl orange
brilliant green
Chinese herb medicines
