【摘要】 建立了以 2 (5 溴吡啶偶氮 ) 5 二乙氨基苯酚 (5 Br PADAP)作显色剂 ,溴代十六烷基吡啶 (CPB)为增溶增敏剂 ,用小波变换—偏最小二乘分光光度法同时测定钴 ,镍 ,锌的方法。在波长 5 30～ 5 90nm范围内每隔 2nm测定其吸光值 ,将测定结果分别用偏最小二乘法处理和经小波变换后用偏最小二乘法处理。结果表明 ,经小波变换后处理结果回收率明显提高。更多还原

【Abstract】 The optimum conditions of the colour reaction of Cobalt,Nickel and Zinc with 5-Br-PADAP were established in the presence of the sensitizer/solubilizer CPB. The absorbances of the reaction system Co-Ni-Zn-(5-Br-PADAP)-CPB were measured in the spectral range of 530-590 nm at every 2 nm intervals. A chemometric method of data treatment was studied. Through the comparative study of data treatment by PLS method and by PLS after wavelet transformation, it was found that the recovery of determination is significantly improved by using the latter method.更多还原