摘要
研究了非离子型表面活性剂 Ｔｒｉｔｏｎ Ｘ－ １００ 存在下，用５ － Ｂｒ－ Ｐ Ａ Ｄ Ａ Ｐ 光度法联合测定镍和锰的方法。结果表明：在ｐ Ｈ９ ．０ 的硼砂缓冲介质中，５ － Ｂｒ － Ｐ Ａ Ｄ Ａ Ｐ 与镍和锰生成紫红色络合物，最大吸收波长为λ Ｎｉｍ ａｘ ＝ ５７５ｎ ｍ ，λｍ ｎｍ ａ ｘ ＝ ５７５ｎｍ ；表现摩尔吸光系数为ε Ｎｉ５ ７ ５ ＝ １ ．０７ ×１０５ Ｌ·ｍ ｏｌ－ １ ·ｃｍ － １ ，ε Ｍｎ５ ７ ５ ＝ １ ．１２ ×１０５ Ｌ·ｍ ｏｌ－ １ ·ｃｍ － １ ；镍量在０ ～１６ μｇ／２５ ｍｌ ，锰量在０ ～１２ μｇ／２５ ｍｌ 的范围内符合比耳定律。实测了钢样中镍和锰的含量，结果令人满意。
The simultaneous determination of Nickel&Manganese with 5-Br-PADAP spectrophotometry in the presence of TritonX-100 was discussed. The experimental results indicated that a kind of purplish-red complex formed from 5-Br-PADAP,nickel and manganese was in the borax buffer medium of pH9.0.λ ni max =575nm,ε Ni 575nm =1.07×10 5L·mol -1 ·cm -1 、λ Mn max =575nm,ε Mn 575nm =1.12×10 5L·mol -1 ·cm -1 Beer's law was obeyed in the concentration range of 0-16μ?g/25ml of nickel and 0-12μ?g/25ml of manganese.The content of the nickel and manganese in the steel samples was determined,the result of which is quite satisfactory.
基金
内蒙古自然科学基金
