Determination of Aluminium in Water by Graphite Furnace Atomic Absorption Spectrometry with Tungsten and Tantalum Matrix

Replacing tantalum coated on graphite tube by tungsten and tantalum matrix,the direct graphite furnace atomic absorption spectrometry was used to determine aluminium in water.This method avoids the disadvantages of complicated preparation and low use frequency of tantalum-coated graphite tube,and has high sensitivity,high stability,less matrix interference,stable and accurate result.The detection limits can reach 1.0 μg/L.During determination of four water samples for their aluminium contents by this method,the RSD are 2.6% to 5.3%,and the recoveries are 95% to 108%.