以羧基化碳纳米管为固相分散吸附材料，建立了原子吸收光谱法测定工业废水中镍含量的方法。利用羧基碳纳米管在中性环境中对镍离子的快速吸附和酸性条件下对镍离子快速脱附的特性，通过对各项参数进行优化，建立了基于羧基化碳纳米管的样品富集净化的前处理方法，净化富集脱附后的样品采用原子吸收光谱仪测定。实验结果表明，该方法在0.36~2.50 mg/L线性良好（R2=0.999 1），检出限为0.11 mg/L，定量限为0.36 mg/L，以0.5、1.5、2.5 mg/L质量浓度水平添加回收率为97.4%~99.3%，相对标准偏差（RSD）为1.48%~ 1.97%。

A method for the determination of nickel in industrial wastewater by atomic absorption spectrometry with carboxy lated carbon nanotubes as solid phase dispersion adsorption material was established.Based on the rapid adsorption of Ni ions in neutral environment and the rapid desorption of Ni ions under acidic conditions，the pretreatment method of sample enrich ment and purification based on carboxylated carbon nanotubes was established by optimizing the parameters.The samples after enrichment and purification were determined by atomic absorption spectrometry.Results showed that the linearity of the method was good in the range of 0.36~2.50 mg/L（R2=0.999 1）.The limit of detection was 0.11 mg/L and the limit of quantity was 0.36 mg/L.The recoveries were 97.4%~99.3% and the relative standard deviation（RSD） was 1.48%~1.97% at the concentrations of 0.5，1.5，2.5 mg/L.