本文报道了2,4-二羟基-5-安替比林偶氮苯甲醛(DAP)及DAP与聚乙烯醇(PVA)的缩合产物(PV·DAP)的合成.并利用PV·DAP做萃取剂,析相萃取和光度测定了铝合金和环境水样中的镍.实验结果还表明,高分子显色剂与相应的小分子试剂相比,在液-固萃取方面表现为易获得高萃取率且不受萃合物电性的影响,在光度测定方面则表现出较高的灵敏度和稳定性.从而说明试剂的高分子化可改善其性能. In this paper, the synthesis of 2,4-dihydroxy-5-antipyrine azobenzaldehyde (DAP) and the condensation product of DAP with polyvinyl alcohol (PVA) was reported. Agent, phase extraction and photometric method for the determination of nickel in the water of the aluminum alloy and the environment.The experimental results also show that compared with the corresponding small molecule reagent, the polymer chromogenic reagent has the advantages of easy extraction in the liquid-solid extraction Rate and not affected by the electrical properties of the extract, photometry in the show showed higher sensitivity and stability, thus indicating that the polymer can improve the performance of reagents.