Determination of mercury content in soil by ultrasonic aqua leaching-inductively coupled plasma mass spectrometry(ICP-MS)method
To accurately determine the mercury content in soil,a single factor experiment was conducted to investigate the effects of aqua regia,ultrasonic time,and ultrasonic temperature on the determination of mercury content in soil.An ultrasonic aqua regia leaching-inductively coupled plasma mass spectrometry(ICP-MS)method for determining mercury in soil was established.The results show that the best ultrasonic effect is achieved with 7 mL of aqua regia,an ultrasonic temperature of 70℃,and an ultrasonic time of 60 minutes.The method has a detection limit of 0.006 μg/g,a lower limit of quantification of 0.024 μg/g,an RSD of 2.40%～3.93%(n=6),and a sample recovery rate of 90.4%～110.1%.
ultrasonicaqua regia leachinginductively coupled plasma mass spectrometrymercury in soil
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