铁（Ⅱ）－1－（2－吡啶偶氮）－2－萘酚－TritonX－100显色体系的研究及应用

Study and Application of Fe(Ⅱ)-1-(2 pyridine-azo)-2- Naphthol-Tritonx-100 Developed System

本文研究了ＴｒｉｔｏｎＸ一１００存在下，铁（Ⅱ）与１－（２－吡啶偶氮）－２－萘酚（ＰＡＮ）的显色反应，在ＰＨ值３．０～９．０范围内，配合物的最大吸收波长为７４０ｎｍ，表现摩尔吸光系数ε＝１．６×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），铁量在０～８０ｕｇ／２５ｍｌ范围内遵守比耳定律。该法用于纯铝、铝合金、铝基稀土合金中微量铁的测定，结果准确。

This paper studies the developed reaction between Fe(Ⅱ) ana 1-(2 pyrine azo )-2-naphthol (PAN)nnder existence of Tritonx-100.When the PH value is within the limite of 3.0-9.0.the max.absorption wave length of composite is 740mm,apparent Mole absorptivity εis 1.6×10￣4L· mol￣(-1)· cm￣(-1)and Fe content is 0.80μg/25ml. the developed reaction will abide by beer'’s law.The determining result used by this method is accurate to determine micro Fe in pnre aluminium, aluminium alloy and rare earth alloy of aluminium base.