Determination of Heavy Metallic Elements in Tea by ICP-AES with Interference Element Correction

The tea sample was digested by microwave.Barium,cobalt,chromium,copper,nickel,lead,strontium and vanadium in the sample were determined by ICP-AES.Interference element correction was used to eliminate elements interference.The detection limits of barium,cobalt,chromium,copper,nickel,lead,strontium and vanadium were 0.17,1.1,3.2,2.6,2.0,5.1,0.17,0.78 μg·L-1,respectively.The method was used to analyze the standard substance (GBW 10052),giving results in agreement with the certified values and RSD (n=6) in the range of 0.41%-1.6%