Cobalt determination with FI-FAAS after on-line sorbent preconcentration using 1-nitroso-2-naphthol

RETRACTED: Novel analytical reagent for the application of cloud-point preconcentration and flame atomic absorption spectrometric determination of nickel in natural water samples

“…Although the atomic absorption spectrometric (FAAS) method is a powerful analytical tool for determining trace elements in environmental samples, preconcentration and separation techniques combined with FAAS are still necessary. Different chelating agents such as pyrrolidine dithiocarbamate [5], 2-(2-benzothiazolylazo)-2-p-cresol (BTAC) [6], diethyldithiocarbamate [7], dithione [8], 1,10-phenanthroline [9], 1-nitroso-2-naphthol [10], etc. have been used to remove and preconcentrate traces of nickel from various samples prior to their determination by FAAS.…”

“…The application of sophisticated instrumentation such as FI-CV-ICP [28], FIA-ICP-MS [29] or ETV-ICP-MS [30] has also been described for the determination of metal species. The present method was based on the complexation of nickel complexed with N-quino [8,7-b]azin -5-yl-2,3,5,6,8,9,11, 12octahydrobenzo[b] [1,4,7,10,13]pentaoxacyclopentadecin-15-yl-methanimine in presence of Triton X-114 (non-ionic surfactant) at pH 8.0 ± 0.2 using either HCl or NaOH. Optimum experimental conditions were investigated with respect to a standard solution of the same matrix, in order to examine the possibility to obtaining the maximum extraction efficiency with minor sample treatment and minimal experimental conditions.…”

Determination of cobalt in water samples by atomic absorption spectrometry after pre-concentration with a simple ionic liquid-based dispersive liquid-liquid micro-extraction methodology

“…Several analytical techniques such as UV-Vis spectrometry [4][5][6], spectrofluorimetry [7], flow injection chemiluminescence (FI-CL) [8,9], electroanalytical techniques [10][11][12], laser induced thermal lens spectrometry [13], X-ray fluorescence [14], neutron activation analysis (NAA) [15,16], flame atomic absorption spectrometry (FAAS) [17][18][19], electrothermal atomic absorption spectrometry (ET-AAS) [3,20,21], inductively coupled plasma optical emission spectroscopy (ICP-OES) [22][23][24] and inductively coupled plasma mass spectrometry (ICP-MS) [25,26] have been reported for the determination of cobalt in different samples.…”

Optimization of the preconcentration system of cadmium with 1(2-thiazolylazo)-p-cresol using a knotted reactor and flame atomic absorption spectrometric detection

“…FAAS appears to be one of the most attractive approaches for trace element analysis [11][12][13][14]; however, the direct determination of ultratrace amounts of elements by FAAS is usually difficult owing to an insufficient detection power. Consequently, preconcentration procedures, such as ion exchange, adsorption, solvent extraction and coprecipitation, are often needed before the FAAS determination [15].…”