Assessment of Different Instruments and Methods for Detecting Pollution Share Rate of Heavy Metals in Water Samples

摘要

[Objective]This study aimed to investigate the impacts of different instruments and methods on detection of water samples and evaluate the detection results and pollution share rate. [Method]Concentrations of six heavy metals in three surface water samples and three underground water samples were detected by AAS and ICP-AES to analyze the differences in detection results and calculate the pollution share rate of heavy metals. [Result]As a result,the pollution share rate of six heavy metals varied significantly. Calculation results of comprehensive pollution share rate based on the lower pollution index of the same heavy metal in the same water sample detected by two methods were different from the results using either method. Due to different detection limits of instruments,detection results of heavy metals in the same water sample were different,which affected the accuracy of environmental quality assessment. [Conclusion] The detected pollution share rate varies with different detection limits. Therefore,instruments and methods with lower detection limit should be used. To be specific,AAS is suitable for detection of Pb and Cd,while ICP is suitable for detection of Cu,Zn,Fe and Mn.