Continuous Determination of Copper, Lead and Zinc in Ore Samples by Atomic Absorption Spectrophotometry with Polyethylene Glycol as a Rapid Clarifier
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ABSTRACT
Based on the characteristics of water solubility and high polymerization of polyethylene glycol, a method for the continuous determination of copper, lead and zinc in ore samples by atomic absorption spectrophotometry after rapid clarification of the testing solution has been developed. The samples are completely dissolved with HCl-HNO3-HClO4. In the presence of 3 mL of polyethylene glycol, the testing solution is rapidly clarified within 2.5 h. The recoveries of the method for the elements are 86.3%~106.0% with precision of less than 5%RSD (n=5). The method has been applied to the determination of copper, lead and zinc in National Standard Reference rock samples and the results are in agreement with certified values.
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