Indian Journal of Chemical Technology, Vol.7, No.1, 35-37, 2000
Rapid estimation of zinc and copper in tent cloth materials using flame AAS/ICP-AES
A rapid, simple, ecofriendly and cost effective method is described for the determination of Zn and Cu in tent cloth materials using flame Atomic Absorption Spectrometry (F-AAS) and or Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) after the selective dissolution of Zinc and Copper naphthenates into ammoniacal ethylene diamine tetra acetic acid (EDTA) in solutions. EDTA in ammoniacal medium is used as chelating agent to leach the Zinc and Copper from their respective naphthenates. The solutions are filtered and made up to a known volume. An acidity of 5% v/v is maintained w.r.t HNO3 prior to their aspiration either in to flame AAS or ICP-AES for their individual estimation. This method has been applied to some tent cloth samples and the Zn and Cu values are compared with the standard dry ashing/ignition method as per American Society for Testing Materials (ASTM) procedure. The values so obtained are in very good agreement with the standard ignition procedure both by F-AAS/ICP-AES. The relative error by the proposed method varies from <1% to 4.50 % RSD for both Zn and Cu depending upon the content of the elements.
Keywords:GEOLOGICAL-MATERIALS