铬的石墨炉原子吸收信号动力学数学模型的建立及参数测定  

Establishment of kinetic mathematic model and determination of kinetic parameters for chromium absorption signal in graphite furnace atomic absorption spectrometry

作　　者：康维钧[1] 哈婧[2] 孙汉文[3] 

机构地区：[1]河北医科大学公共卫生学院,河北石家庄050017 [2]河北科技大学化学与制药工程学院,河北石家庄050018 [3]河北大学化学与环境科学学院河北省分析科学技术重点实验室,河北保定071002

出　　处：《冶金分析》2007年第8期5-8,共4页Metallurgical Analysis

基　　金：河北省教育厅基金(200114);河北省教育厅博士基金(B2004120)

摘　　要：建立了铬的石墨炉原子吸收信号动力学数学新模型,考察了铬的浓度、氩气流量、原子化温度对动力学参数的影响,并对不同条件下该数学模型的参数进行了计算。结果表明,不同条件下该数学模型的理论曲线与实验结果相吻合,相关系数R2>0.994,测得铬从平台石墨管形成原子的表观活化能为77.65 kJ/mol。A new kinetic mathematic model for graphite furnace atomic absorption signal of chromium has been established. The influence of the experimental conditions such as concentration of chromium, flow rate of argon and atomization temperature on kinetic parameters is investigated, and the kinetic parameters of the model under different conditions are successfully calculated. The results show that the theoretic curves of different condition are accordant with the experimental results, and the correlation coefficient R^2〉0. 994. The apparent activation energy for chromium atomization on flat graphite tube surface is 77.65 kJ/mol.

关 键 词：石墨炉原子吸收光谱法 吸收信号 动力学 铬 

分 类 号：P575[天文地球—矿物学]