Rapid Determination of Arsenic in Infiltration Wastewater of Lanzhou City Garbage Storage Field by Hydride Generation-Atomic Fluorescence Spectrometry

In this paper HNO₃-HClO₄ was used to digeste the sample, thiourea and chloric acid were added to reduce the sample in hydrochloric acid solution, and arsenic in the pretreated sample was analyzed using hydride-atomic absorption spectrometry. The method had been applied to the city rubbish infiltration wastewater in the sewage storage site of Lanzhou. The recoveries were 98.3%~104%, the relative standard deviation were 1.2%~3.2%, and the detection limit of method was 0.35 μg/L, the Linear regression equation was: IF=15.962×C+0.423 and the correlation coefficient was 0.999 8. It is confirmed by testing that the method is simple, rapid, accurate and reliable, and has a wide measurable range, it is an effective detection method for the directly determination of urban sewage, and is able to provide a scientific basis for the evaluation of garbage storage site of Lanzhou city on the degree of impact of the environment and the governance.