摘要
在硫酸介质中,铋(Ⅲ)对碘酸钾氧化生物染料曙红B的褪色反应有强烈的催化作用,据此建立了测定痕量铋(Ⅲ)的催化动力学新方法。体系催化反应吸光度(A)和非催化反应吸光度(A0)的变化值(ΔA)与铋(Ⅲ)浓度在0.2~1.2 mg/L范围内呈良好的线性关系。方法检出限为7.22×10-11 g/L,表观速率常数为2.97×10-4 s-1,表观活化能为36.74 kJ/mol。将该法用于水体中痕量铋(Ⅲ)的测定,结果满意,回收率为98.5%~104.2%。
In H2SO4 media,bismuth(Ⅲ) has strong catalytic effect on the decolorizing reaction of potassium iodate oxidizing biological dyestuff,bromeosin B.According to this phenomenon,a new method of trace bismuth(Ⅲ) de-termination by catalytic kinetics has been established hereby.The absorbency variation value ΔA of system catalytic reaction(A) and non-catalytic reaction(A0) have good linear relationship with bismuth(Ⅲ) whose mass concentration is in the range of 0.2-1.2 mg/L,and the detection limits is 7.22×10-11 g/L.The apparent velocity con-stant is 2.97×10-4 s-1,and apparent activated energy is 36.74 kJ/mol.The method has been applied to the determina-tion of trace bismuth(Ⅲ) in water body.The results are satisfactory and its recovery rate is 98.5%-104.2%.
出处
《工业水处理》
CAS
CSCD
北大核心
2010年第8期69-71,共3页
Industrial Water Treatment
基金
重庆市教育委员会资助项目(KJ051201)
重庆文理学院校级重点资助项目(Z2009HH09)
关键词
曙红B
催化动力学光度法
痕量铋(Ⅲ)
bromeosin B
catalytic kinetics spectrophotometry
trace bismuth(Ⅲ)