The effect of experimental conditions on the absorbance is studied.The method is proved to be simple and quick and has been satisfactorily applied to the determination of nitrophenol in wastewater.

• 探索了反应的最佳显色条件，以及废水中可能存在的有机及无机物质的干扰情况，为药厂废水中对硝基酚含量的测定提供了方便快速、灵敏度高、重现性好的检测方法。