Study on Rapid Determination of Nitrobenzene and Aniline in Water by an Improved Azo Photometric Method

An reducing-azo photometric method is established for rapid,simultaneously determination of nitrobenzene and aniline in water,the improvement of pre-treating device based on experimental principles,which simplify the experiment procedure and avoid samples losses during solution filtration process,The pre-treating experimental efficiency increased by 90%. The improved method can be used to simultaneously determine of nitrobenzene and aniline. The precision of the method was determined by repeated( n = 6) analysis, the RSDs were 1. 9%-3. 2%. The method was successfully applied to the simultaneously determination of nitrobenzene and aniline in standard reference material and real wastewater samples,the determined values are accordant with the results of national standard method. the results are satisfactory. The recoveries of the method were determined with the standard addition method,the results were 96%-101%. The results show that the improved method is accurate and reliable,can be used to simultaneously determine of nitrobenzene and aniline in water and wastewater.