Cobalt（Ⅱ）ion can catalyze the decolorrization reaction of hydrogan peroxide and m-cresol purple in a pH=10.0 NH3-NH4Cl buffer solution.The kinetic condition was studied,and the apparent activation energy（E′a=51.2...Cobalt（Ⅱ）ion can catalyze the decolorrization reaction of hydrogan peroxide and m-cresol purple in a pH=10.0 NH3-NH4Cl buffer solution.The kinetic condition was studied,and the apparent activation energy（E′a=51.26 KJ/mol.）and apparent rate constant[k′=1.13×10-4(s-1)]were determined.The linear range is 4.0～40 μg/L,and the detection limit for cobalt（Ⅱ）is 6.0×10-10 g/mL.The method was applied to the direct determination of trace Co（Ⅱ）in VB12,Jasmine tea and groundwater samples.展开更多
文摘Cobalt（Ⅱ）ion can catalyze the decolorrization reaction of hydrogan peroxide and m-cresol purple in a pH=10.0 NH3-NH4Cl buffer solution.The kinetic condition was studied,and the apparent activation energy（E′a=51.26 KJ/mol.）and apparent rate constant[k′=1.13×10-4(s-1)]were determined.The linear range is 4.0～40 μg/L,and the detection limit for cobalt（Ⅱ）is 6.0×10-10 g/mL.The method was applied to the direct determination of trace Co（Ⅱ）in VB12,Jasmine tea and groundwater samples.
