Determination of Mercury in Enviromental Samples by Flow Injection Cold Vapor Atomic Absorption Spectrometry
FAN Shi-hua *, JIN Jing (Research Center for Analytical Science, Northeastern University, Shenyang, 110004)
A method for the detemination of total mercury in soil samples based on cold-vapor generation atomic absorption spectrometry in combination with flow injection sampling is described. Calibration graphs are linear for 0 to 20 ng/mL of Hg(Ⅱ). The detection limit (3σ) obtained is 0 01 ng/mL. Other ions typically presented in soil solutions have no interference except Cr(Ⅵ). The present method allows the determination of mercury in the range of 0～20 ng/mL with a relative standard deviation (RSD) of 0.5%～1.5% at the rate of 90 samples/h. Recoveries for soils are 91%～110%. The method has been applied to the determination of mercury in soil samples.