Improvement of copper FAAS determination conditions via preconcentration procedure with the use of salicylaldoxime complex trapped in polymer matrix

Ion imprinted polymeric nanoparticles for selective separation and sensitive determination of zinc ions in different matrices

“…Langmuir adsorption isotherm is expressed by Eq. (5) [29]. The corresponding transformations of the equilibrium data for Zn 2+ ions gave rise to a linear plot, indicating that the Langmuir model could be applied in these systems and described by the equation:…”

Effect of the Structure of Alkyl Salicylaldoxime on Extraction of Copper(II)

“…Although salicylaldoxime and tert-butylsalicylaldoxime showed by far the weaker extraction capacity for Cu(II) than nonylsalicylaldoxime and tert-octylsalicylaldoxime, their extraction efficiencies for Cu(II) were also slightly higher at pH of 3-4 than at other pH values ( Figure 2). Salicylaldoxime-based extractants are acid organics, and they chelate Cu(II) in a 2:1 ratio, as shown in Figure 3 [19].…”

“…The extraction efficiency declined after the pH exceeds 4, because Cu(II) presents solid or colloidal particle forms in high pH solutions, which may interfere with its extraction [19].…”

Selective voltammetric determination of Cu(II) based on multiwalled carbon nanotube and nano-porous Cu-ion imprinted polymer

“…It has been shown that copper is an essential element for many biological processes such as blood formation and function of many important enzymes [1]. Copper is classified as biogenic element playing a significant role in photosynthesis, metabolism of nitrogen compounds or regulation of RNA and DNA transcription process [2]. Moreover, the presence of heavy metals such as copper in the aquatic environment is a source of great environmental concern.…”

“…Over the past two decades the idea of imprinted polymers has been developed and gained immense popularity both for molecules and metal ions. Leaching of the template ion/molecule from the obtained sorbent provides active cavities retaining spatial geometry of template [2]. Using of ion imprinted technique in carbon paste electrode as modifier can develop a highly selective copper sensor, would enable the fast, easy and low-cost detection of this element in different samples.…”