Preconcentration of thallium(III) with 2,6-bis(N-phenyl carbamoyl) pyridine on microcrystalline naphthalene prior to its trace determination in human serum spectrophotometrically

Solid phase extraction of heavy metal ions in environmental samples on multiwalled carbon nanotubes

“…Due to its cheap cost, simplicity, atomic absorption spectrometry is the main instrument for the determination of heavy metals in many laboratories. However, the determination of metals at g l −1 level by especially flame atomic absorption spectrometry is impossible due to their lower levels and interferic effects of 1A and 2A group elements in the determinations [3][4][5]. In order to solve these problems in flame atomic absorption spectrometric determinations, separation-enrichment procedures including cloud point extraction, membrane filtration, liquid-liquid extraction, coprecipitation, solid phase extraction have been used [6][7][8][9][10][11].…”

Nano-level determination of copper with atomic absorption spectrometry after pre-concentration on N,N-(4-methyl-1,2-phenylene)diquinoline-2-carboxamide–naphthalene

“…A survey of the literature revealed that various adsorbents such as thiol cotton [47,48], silinized glass beads resin [49], silica gel [50], activated carbon [11], C 60 -C 70 fullerene [51] and microcrystalline naphthalene [52] have been investigated for pre-concentration of metal ions. In this work copper (II) is separated and pre-concentrated by adsorption on N,N-(4-methyl-1,2-phenylene)diquinoline-2-carboxamide-naphthalene ((Mebqb)-naphthalene) adsorbent, then eluted by hydrochloric acid and determined by FAAS.…”

Determination of thallium in environmental samples by surfactant assisted dispersive liquid-liquid microextraction combined with first order derivative spectrophotometry

“…But they are commonly used in medicines for dermatological disorders, dyes, pigments, fungicides, insecticides, rodenticides and as reagents in chemical research [4]. They are also used in the manufacture of corrosion-resistant alloys, scintillation counters and low-melting special glass for highly reflective lenses [5][6][7][8].…”