Volume 8, Issue 25 (Summer 2014)
IJT 2014, 8(25): 1041-1047 |
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Mostafa Delavar1 
, Majid Ramezani *2 , Mahdi Abdollahi3 , Atefeh Navabi3 , Abdolreza Baderestani4 , Shoukofeh Hadavand5 , Masoodeh Sadeghi5
, Majid Ramezani *2 , Mahdi Abdollahi3 , Atefeh Navabi3 , Abdolreza Baderestani4 , Shoukofeh Hadavand5 , Masoodeh Sadeghi5
1- Department of Pharmacology, Arak University of Medical Sciences, Arak, Iran.
2- Department of Chemistry, Arak Branch Islamic- Azad University, Arak, Iran. ,mramazani@iau-arak.ac.ir
3- MSc, Expert of Control Laboratory Food and Beverage, Decorative, Hygienic Products of Arak's Medical Sciences University.
4- MSc, Expert of Control Office on Food and Beverage, Decorative, Hygienic Products of Arak’s Medical Sciences University.
5- MSc, Chemistry Expert Advisor, Arak University of Medical Sciences, Arak, Iran.
2- Department of Chemistry, Arak Branch Islamic- Azad University, Arak, Iran. ,
3- MSc, Expert of Control Laboratory Food and Beverage, Decorative, Hygienic Products of Arak's Medical Sciences University.
4- MSc, Expert of Control Office on Food and Beverage, Decorative, Hygienic Products of Arak’s Medical Sciences University.
5- MSc, Chemistry Expert Advisor, Arak University of Medical Sciences, Arak, Iran.
Abstract: (7504 Views)
Background: cold-induced aggregation micro extraction based (CIAME) based on ionic liquid was used as a rapid and simple method for determination trace amounts of cadmium and lead in milk powder by analysis with flame atomic absorption spectrometry (FAAS).
Methods: Sample solution containing of Cd2+ and Pb2+ in dynamic range, phosphate buffer (pH = 9, 3 ml), diethyl dithiocarbamate (complexing agent), Triton X-100, NaPF6 ,[HMIM][PF6] (extraction solvent) were transferred into conical bottom glass tube. Sample was kept in a thermostated bath and then ice bath a cloudy solution was formed. Two phases separated by centrifugation. After removing of aqueous phase, IL-phase was dissolved in methanol and diluted was injected to the FAAS by microsampler introduction.
Results: ILs, containing imidazoliumcation and hexafluoro phosphate anion, [HMIM][PF6](70mg), 200 mg NaPF6 ,0.01 mol.L-1 DDTC, 0.015% of Triton X-100 obtained, pH 9 and centrifuge time 5 min (4000 rmp) was chosen. Detection limit were obtained 0.12 µgL-1, 1.61µgL-1, RSD 0.95%, 2.2% and enrichment factor of 70, 67 for Cd and Pb, respectively.
Conclusion: CIAME allows determination of cadmium and lead in real samples in a simple, rapid and safe method with only a small amount of ionic liquid was used. In comparison with the organic solvent extraction, CIAME is much safer and the determination of species in high ionic strength samples is possible.
Methods: Sample solution containing of Cd2+ and Pb2+ in dynamic range, phosphate buffer (pH = 9, 3 ml), diethyl dithiocarbamate (complexing agent), Triton X-100, NaPF6 ,[HMIM][PF6] (extraction solvent) were transferred into conical bottom glass tube. Sample was kept in a thermostated bath and then ice bath a cloudy solution was formed. Two phases separated by centrifugation. After removing of aqueous phase, IL-phase was dissolved in methanol and diluted was injected to the FAAS by microsampler introduction.
Results: ILs, containing imidazoliumcation and hexafluoro phosphate anion, [HMIM][PF6](70mg), 200 mg NaPF6 ,0.01 mol.L-1 DDTC, 0.015% of Triton X-100 obtained, pH 9 and centrifuge time 5 min (4000 rmp) was chosen. Detection limit were obtained 0.12 µgL-1, 1.61µgL-1, RSD 0.95%, 2.2% and enrichment factor of 70, 67 for Cd and Pb, respectively.
Conclusion: CIAME allows determination of cadmium and lead in real samples in a simple, rapid and safe method with only a small amount of ionic liquid was used. In comparison with the organic solvent extraction, CIAME is much safer and the determination of species in high ionic strength samples is possible.
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