The voltammetic property of amikacin was studied by cyclic voltammetery and differential pulse cathode stripping voltammetry at glassy carbon electrod.In HCl(pH=2) solution,the sensitive reductive peak was obtained ...The voltammetic property of amikacin was studied by cyclic voltammetery and differential pulse cathode stripping voltammetry at glassy carbon electrod.In HCl(pH=2) solution,the sensitive reductive peak was obtained for amikacin at about-0.42V(vs.Ag/AgCl).There was a good linear relationship between the differential pulse peak current and the concentrate of Amikacin sulfate in the range from 1.25 10-6mol/L to 9.5 10-4 mol/L.The detection limit was 2.75×10-7mol/L.The method was used to determine amikacin in injection samples with satisfactory results.展开更多
采用HNO3-H2O2消解-电化学方法测定小米中的铬含量。在DTPA-HAc-Na Ac体系中铬(Ⅵ)离子在镀汞电极上形成汞齐从而得到氧化峰电流,考察能够满足电化学测定的前处理消解技术。结果表明,铬(Ⅵ)离子的消解液在温度130℃,硝酸10 m L,过...采用HNO3-H2O2消解-电化学方法测定小米中的铬含量。在DTPA-HAc-Na Ac体系中铬(Ⅵ)离子在镀汞电极上形成汞齐从而得到氧化峰电流,考察能够满足电化学测定的前处理消解技术。结果表明,铬(Ⅵ)离子的消解液在温度130℃,硝酸10 m L,过氧化氢38 m L,p H值呈中性时能够得到很好的电化学测定结果,线性相关系数为0.99,回收率为90%~110%。方法可以用于米中痕量铬(Ⅵ)的测定。展开更多
文摘The voltammetic property of amikacin was studied by cyclic voltammetery and differential pulse cathode stripping voltammetry at glassy carbon electrod.In HCl(pH=2) solution,the sensitive reductive peak was obtained for amikacin at about-0.42V(vs.Ag/AgCl).There was a good linear relationship between the differential pulse peak current and the concentrate of Amikacin sulfate in the range from 1.25 10-6mol/L to 9.5 10-4 mol/L.The detection limit was 2.75×10-7mol/L.The method was used to determine amikacin in injection samples with satisfactory results.
文摘采用HNO3-H2O2消解-电化学方法测定小米中的铬含量。在DTPA-HAc-Na Ac体系中铬(Ⅵ)离子在镀汞电极上形成汞齐从而得到氧化峰电流,考察能够满足电化学测定的前处理消解技术。结果表明,铬(Ⅵ)离子的消解液在温度130℃,硝酸10 m L,过氧化氢38 m L,p H值呈中性时能够得到很好的电化学测定结果,线性相关系数为0.99,回收率为90%~110%。方法可以用于米中痕量铬(Ⅵ)的测定。