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Volume :37 Issue : 1 2010      Add To Cart                                                                    Download

Micelle mediated methodology for the determination of heavy metals in real samples by flame atomic absorption spectrometry

Auther : FARSHID AHMADI*, AZADEH KHANMOHAMMADI**, JAMSHID JAFARPOUR*** AND SAAYAD ATAOLLAH EFTEKHARI****

**Chemistry Department, Islamic Azad Univercity,Sama Branch, Gachsaran, Iran

***Young Researchers Club, Islamic Azad University, Gachsaran Branch, Gachsaran, Iran

****Islamic Azad Univercity, Yasouj Branch, Yasouj, Iran

*E-mail: Ahmadi@iaug.ac.ir or Ahmadi.farshid@yahoo.com

 

ABSTRACT

 

A simple and sensitive method is described for the pre-concentration by cloud point extraction followed by atomic absorption spectrometric determination of nickel, lead, zinc and copper ions in real samples. At a solution pH of 7.0, 2-amino-5-mercapto-1, 3, 4 -thiadiazole (AMTD) and Triton X-114 were used as hydrophobic ligand and non-ionic surfactant. The adopted concentrations for AMTD, Triton X-114 and HNO3, bath temperature, centrifuge rate and time were optimized. Detection limits (3SDb/m) of 1.4, 1.6, 1.7 and 1.5 ng mL-1 for along with enrichment factors of 29 for these ions were achieved. The presented procedure was applied to the determination of analytes in cow liver, natural and industrial waste water and blood samples with successful results (recoveries greater than 97%, R.S.D., lower than 1.8 % for N=3).

 

Keywords: 2-Amino-5-mercapto-1, 3, 4-thiadiazole (AMTD), nickel, lead, zinc, copper, cloud point extraction; Flame Atomic Absorption Spectrometry) FAAS).

 

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