酚藏花红为显色剂氧化显色光度法测定废水中的Cr(Ⅵ)

Oxidational Colour Spectrophotometric Determination of Chrornium in Waste Water by Using Phenosafranine as Colourins Reagent

研究了在非离子表面活性剂ＯＰ的存在下，以酚藏花红为显色剂，氧化显色光度法，测定废水中的Ｃｒ（Ⅵ），其摩尔吸光系数ε＝２．８８×１０４Ｌ·ｍｏｌ－１ｃｍ－１。回归方程Ａ＝０．００１２＋０．０１０２Ｃ，相关系数ｒ＝０．９９９９。该法简便，快速，灵敏度高，选择性好，稳定性更佳，在０～６．０×１０－２ｇ／Ｌ范围内服从比耳定律。实验结果令人满意。

Oxidational colour spectrophotometric determination of chrornium by using phenosafranine as colouring reagent was studied in this paper. Beer's law was obeyed in range of 0￣1.2μmol/50ml of chromiun with the absorptivity ε=2.88×10 4 L·mol -1 cm -1 ,and its regression equation is A =0.0102 C +0.002 with relative coefficient γ =0.9999. The proposed method is simple, rapid and of selectivity, and applied to the determination of chrornium in waste water with satisfactory results.