A new Cu(II)- 5-(4-sulphophenylazo)-8-aminoquinoline complex used for copper determination in presence of gold and silver in water and mineral samples

Recent trends in solid phase spectrometry: 2003–2009. A Review

“…Inevitably, 50 to 1000 cm 3 sample solutions had to be used for trace analysis to compensate for the shorter light path of solid particle layers. Although novelty in the light measurement techniques could not be found in these papers, some interesting results on the applicability of multicomponent analysis to improve the selectivity and analytical performance [17], a prevalidation method to evaluate the validity or reliability of the SPS method [18], a newly synthesized chromogenic reagent [19] and specific determination of different oxidation states [20] are described. Quite recently, a 0.06 cm 3 portion of a cation exchanger was used to concentrate the target Cr(VI) in a 20 cm 3 water sample, and resin beads were introduced in a flow cell of 1.5-mm diameter and having a 10-mm light path length.…”

“…Because of the strong interaction between aromatic rings, the distribution ratio (D) of target chemical species containing aromatic rings for the polystyrene-type ion-exchange resin is usually higher than that for the gel-type ion exchanger. Morales et al used a DEAE-Sephadex anion exchanger for the adsorbent of 5-(4-sulphophenylazo)-8-aminoquinoline (SPA) so that it would function as a chelating resin for Cu(II) in the sample solution [19]. For this purpose, the polystyrene-type ion-exchange resin seemed to be suitable, but they selected to use the gel type because of easier diffusion of the ligand in the ion exchanger phase.…”

Recent development in derivative ultraviolet/visible absorption spectrophotometry: 2004–2008

“…Morales et al [17] proposes to use spectrophotometry for determination of copper in derivative modality to reach detection limits at trace level carrying out a previous preconcentration to the instrumental measure, obtaining the analytical signal directly in the solid phase, in order to increase the sensitivity and to diminish the previous stages. With the same objective, natural analcime zeolite was used for the solid-phase extraction of trace palladium from water and synthetic samples [29].…”

Application of 2‐(benzyliminomethyl)‐6‐methoxy‐4‐(4‐methoxyphenyl‐azo)phenol in construction of ion‐selective PVC membrane electrode for determination of copper (II) in mineral water sample

“…Generally, several techniques such as extraction, spectrophotometry flow injection analysis, kinetic methods , luminescent, voltammetric determination, graphite furnace atomic absorption spectrometry (GFAAS) flame atomic absorption spectrometry (FAAS), liquid chromatography and inductively coupled plasma spectrometry, have been widely utilized for the efficient determination of copper (II) ion. Most of these methods, especially those based on complex instrumental techniques, are expensive and time‐consuming.…”