摘要
在酸性条件下,Bi(Ⅲ)可以定量置换出Cu(Ⅱ)-EDTA中的Cu(Ⅱ),Cu(Ⅱ)对过氧化氢同时氧化甲基绿和中性红的褪色反应效果具有催化作用.通过测量535 nm和627 nm波长下的吸光度,建立双波长催化动力学分光光度法间接测定药物中铋的新方法.实验所得的最佳条件下进行实验,Bi(Ⅲ)在0.010~2.20μg/25 m L范围与ΔA呈良好的线性关系,检出限为8.9×10^-9g/m L.用于药物中铋的测定,结果满意.
It was found that Cu(II) had catalytic decolorization reaction of methyl green and neutral red by hydrogen peroxide in acidic condition(sulfuric acid system), and Bi(III) can displace Cu(II) in EDTA-Cu (II). By measuring the absorbance at 535 nm and 627 nm wavelength, a new method for dual-wavelength catalytic kinetic spectrophotometry indirect determination of Bi (III) has been developed.The linear range was 0.100-2.20 μg/25mL, and the detection limit was 8.9 ×10^-9 g/mL.It has been successfully applied to the determination of bismuth in medicine.
出处
《淮北师范大学学报(自然科学版)》
CAS
2015年第3期30-34,共5页
Journal of Huaibei Normal University:Natural Sciences
基金
安徽省高校省级自然科学研究重点基金项目(KJ2011A255)
关键词
分光光度法
铋(Ⅲ)
双波长
甲基绿
中性红
spectrophotometry
bismuth (III)
dual wavelength
methyl green
neutral red