Ion‐flotation Separation of Cd(II), Co(II) and Pb(II) Traces Using a New Ligand before Their Flame Atomic Absorption Spectrometric Determinations in Colored Hair and Dryer Agents of Paint

Abstract

A simple, rapid and inexpensive method for separation and preconcentration of some traces of hazardous elements is presented prior to their flame atomic absorption spectrometric determinations. At pH 6.5; cadmium(II), cobalt(II) and lead(II) were separated simultaneously with 1,2-bis((1H-benzo[d]imidazol-2-yl)methoxy)benzene (BBIMB) as a new complexing agent and floated after adding sodium dodecyl sulfate (SDS) as a foaming reagent. The floated layer was then eluted by concentrated nitric acid in methanol and introduced to the flame atomic absorption spectrometer (FAAS). The effects of pH, concentration of BBIMB, type and amount of surfactant as the floating agent, type and amount of eluting agent and influence of foreign ions on the recoveries of the analyte ions were investigated. Also, by using a non-linear curve fitting method the formation constants of Cd(II), Co(II) and Pb(II) complexes were obtained 1.02 × 10 6 , 1.17 × 10 6 and 1.46 × 10 6 , respectively. The detection limits of Cd(II), Co(II) and Pb(II) ions were 1.2, 0.7 and 0.5 mg/L, respectively. The enrichment factors were 45.0, 42.0 and 39.0 for Cd(II), Co(II) and Pb(II) ions, respectively. The proposed procedure was then successfully applied for determination of those heavy metals in colored human hair and dryer agents of paint samples.

Supported liquid membrane based removal of lead(II) and cadmium(II) from mixed feed: Conversion to solid waste by precipitation

“…Moreover, PbCl remained undissociated as H 2 PbCl 4 at lower pH condition and it further inhibits complexation of solute with carrier [22]. Similar results were reported by other researchers too [23,24]. Both the extraction and recovery start decreasing beyond the pH of 5.0 when sufficient HCl is unavailable for the protonation.…”

Determination of Lead(II) as Brillant Black BN Chelates in Water and Soil Samples After Separation-Preconcentration on Cellulose Nitrate Membrane Filter

“…In various separation and preconcentration studies (34)(35)(36)(37)(38)(39) it has been reported that complexation of metal ions with a suitable chelating agent improves the recoveries of the analyte ions. In our study, we examined the influence of different Brillant Black BN amounts on the recoveries of Pb(II) on the cellulose nitrate membrane filter while keeping other parameters constant.…”

Ultra‐Trace Silver Determination in Biological and Water Samples by Electrothermal Atomic Absorption Spectrometry after Electrodeposition on a Graphite Probe

“…[1][2][3][4][5][6] Hence, a simple, sensitive and powerful method is necessary to determine silver at trace and ultra-trace levels. The direct determination of silver in complex matrix by common methods, such as flame atomic absorption spectrometry (FAAS), 7 electrothermal atomic absorption spectrometry (ETAAS), 8 neutron activation analysis (NAA), 9 inductively coupled plasma atomic emission spectrometry (ICP-AES), 10 is usually difficult because of low concentration of silver and matrix interference and an initial sample pretreatment is necessary. Several different methods, such as liquid-liquid extraction (LLE), 11 cloud point extraction (CPE), 12 and solid phase extraction (SPE), 13,14 have been used for this purpose.…”