The experiment uses microwave digestion-inductively coupled plasma mass spectrometry(ICP-MS)to determine arsenic and mercury in the soil of industrial parks.The soil samples are digested using microwave,in the acid digestion system,the volume ratio of concentrated nitric acid,hydrofluoric acid,and perchloric acid is 2∶1∶1,with a digestion time of 35 min and a digestion temperature of 180℃.The results indicate that the arsenic concentration is 0.1～50.0 μg/L,the linear relationship is good,with a correlation coefficient of 0.9996(greater than 0.995),a spiked recovery rate of 103.2%,a relative standard deviation(RSD)of 2.33%,and a detection limit of 0.056 μg/L;mercury concentration is 0.1～15.0 μg/L,the linear relationship is good,with a correlation coefficient of 0.9984(greater than 0.995),a spiked recovery rate of 99.2%,RSD of 1.84%,and a detection limit of 0.009 μg/L.This method has good repeatability and high precision,and is suitable for the detection of trace element residues in soil of industrial parks.
关键词
微波消解/ICP-MS/土壤/砷和汞
Key words
microwave digestion/ICP-MS/soil/arsenic and mercury
维普
万方数据