Carrier Element-Free Coprecipitation for Preconcentration of Mn2+, Co2+, Ni2+, Cd2+ and Cu2+ Ions from Water, Brewed Tea and Tobacco Samples

Mohammadi, Sayed Zia; Balengei, Maryam; Pourhasanghani, Alieyeh; Fozooni, Samieh; Amiri, Asghar

Document Type : Full research article

Authors

¹ Department of Chemistry, Payame Noor University, P.O. BOX 19395-3697 Tehran, Iran

² Depatment of Mining Engineering, Higher Education Complex of Zarand, Zarand, Iran

Abstract

A preconcentration procedure, based on the coprecipitation of Mn²⁺, Co²⁺, Ni²⁺, Cd²⁺ and Cu²⁺ ions using a new organic coprecipitant, (2-(4-{[(4-{5-oxo-4-[1-(2-thienyl) methylidene]- 4,5-dihydro- 1,3- oxazole-2-yl} phenyl) imino] methyl} phenyl) methylidene ] amino} phenyl) -4-[ 1-phenyl methylidene] -1,3-oxazole-5(4H)-one (OTMDO) without adding any carrier element has been developed. The resultant concentrated elements were determined by using flame atomic absorption spectrometer. The influences of some analytical parameters including pH, amount of the coprecipitant, standing time, centrifugation rate and time, sample volume and diverse ions were investigated on the quantitative recoveries of analyte ions. Under the optimized experimental conditions, the calibration curves for the analyte ions were studied. The relative standard deviations for seven replicate determinations of a mixture of 0.1 mg mL⁻¹ Mn²⁺, Co²⁺, Ni²⁺, Cd²⁺ and Cu²⁺ ions in the original solution were 2.5, 2.4, 2.2, 2.1 and 2.5%, respectively. The detection limits based on 3S_b/m for Mn²⁺, Co²⁺, Ni²⁺, Cd²⁺ and Cu²⁺ ions in the original solution were 1.2, 1.3, 1.2, 0.6 and 1.5 ng mL⁻¹, respectively. The proposed method has been applied for determination of trace amounts of the analyte ions in the standard, water samples; brewed tea; tobacco samples and satisfactory results were obtained.

Keywords

20.1001.1.23832207.2018.5.1.1.8

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Iranian Journal of Analytical Chemistry

Carrier Element-Free Coprecipitation for Preconcentration of Mn2+, Co2+, Ni2+, Cd2+ and Cu2+ Ions from Water, Brewed Tea and Tobacco Samples

References

References

Volume 5, Issue 1 - Serial Number 1
March 2018
Pages 1-8

Carrier Element-Free Coprecipitation for Preconcentration of Mn2+, Co2+, Ni2+, Cd2+ and Cu2+ Ions from Water, Brewed Tea and Tobacco Samples

References

References

Volume 5, Issue 1 - Serial Number 1March 2018Pages 1-8

Volume 5, Issue 1 - Serial Number 1
March 2018
Pages 1-8