Cloud point extraction and flame atomic absorption spectrometric determination of cadmium(II), lead(II), palladium(II) and silver(I) in environmental samples.
The phase-separation phenomenon of non-ionic surfactants occurring in aqueous solution was used for the extraction of cadmium(II), lead(II), palladium(II) and silver(I). The analytical procedure involved the formation of understudy metals complex with bis((1H-benzo [d] imidazol-2yl)ethyl) sulfane (BIES), and quantitatively extracted to the phase rich in octylphenoxypolyethoxyethanol (Triton X-114) after centrifugation. Methanol acidified with 1molL(-1) HNO(3) was added to the surfactant-rich phase prior to its analysis by flame atomic absorption spectrometry (FAAS). The concentration of BIES, pH and amount of surfactant (Triton X-114) was optimized. At optimum conditions, the detection limits of (3 sdb/m) of 1.4, 2.8, 1.6 and 1.4 ng mL(-1) for Cd(2+), Pb(2+), Pd(2+) and Ag(+) along with preconcentration factors of 30 and enrichment factors of 48, 39, 32 and 42 for Cd(2+), Pb(2+), Pd(2+) and Ag(+), respectively, were obtained. The proposed cloud point extraction has been successfully applied for the determination of metal ions in real samples with complicated matrix such as radiology waste, vegetable, blood and urine samples.
Ghaedi
Mehrorang
M
Chemistry Department, Yasouj University, Yasouj, Iran. m_ghaedi@mail.yu.ac.ir
Shokrollahi
Ardeshir
A
Niknam
Khodabakhsh
K
Niknam
Ebrahim
E
Najibi
Asma
A
Soylak
Mustafa
M
D002104:Cadmium / Q000032:analysis* / Q000302:isolation & purification; D004785:Environmental Pollutants / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000032:analysis* / Q000302:isolation & purification; D017830:Octoxynol; D010165:Palladium / Q000032:analysis* / Q000302:isolation & purification; D011092:Polyethylene Glycols; D015203:Reproducibility of Results; D012834:Silver / Q000032:analysis* / Q000302:isolation & purification; D012965:Sodium Chloride; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013696:Temperature
D004785:Environmental Pollutants; D002104:Cadmium; D007854:Lead; D012834:Silver; D011092:Polyethylene Glycols; D012965:Sodium Chloride; D010165:Palladium; D017830:Octoxynol; C010615:Nonidet P-40