Differential Pulse Polarographic Determination of Uranium(VI) in Complex Materials after Adsorption of Its Trifluoroethylxanthate Cetyltrimethylammonium Ion-Associated Complex on Naphthalene Adsorbent

Solid phase extraction using silica gel modified with murexide for preconcentration of uranium (VI) ions from water samples

“…The sorption characteristics of SiAPMS-Mu is compared with those of other sorbents in Table 3 [7][8][9][10][11][12][13][14][15][16][26][27][28][29][38][39][40][41][42][43][44][45][46]. The new synthesized sorbent in the present study shows highest preconcentration factor for U(VI) among other modified silica gel with N-tripropionate-substituted tetraazamacrocycle [29], Quinoline-8- Table 4 Determination of U(VI) in water samples by the proposed sorbent Real sample a Added (g mL −1 ) Found (g mL −1 ) % Extraction (batch method) Added (g mL −1 ) Found (g mL −1 ) % Recovery (column method) ol [28], benzoylthiourea [26], calixarene semicarbazone [27] and catechol [41].…”

“…For this purpose, new sorbent materials such as polymeric resins, activated carbon, naphthalene and silica gel have been developed for more effective extraction. However, some of the sorbents suffer from a number of drawbacks such as long preconcentration time, low mechanical stability of the sorbent, slow kinetics, irreversible adsorption of target and swelling [7][8][9][10][11][12][13][14][15][16][17]. So, there is still a need for developing good sorbent for U(VI) ions.…”

Determination of Ultra Trace Amounts of Uranium (VI) by Adsorptive Stripping Voltammetry Using L-3-(3, 4-dihydroxy phenyl) Alanine as a Selective Complexing Agent

“…Thus, determination of uranium requires high sensitivity and selectivity due to its strong association with other elements. Therefore, several analytical techniques such as inductively coupled plasma atomic emission spectrometry (Fujino et al 2000), inductively coupled plasma-mass spectrometry (ICP-MS;Sabarudin 2007;D'Ilioet al 2007;Varga and Suranyi 2007), neutron activation analysis (NAA), gamma and alpha spectrometry (Ehmann et al 1991;Parry 1991;Smales 1996), gas chromatography (Hao et al 1996;Hiyama et al 1997), differential pulse polarography (Puri et al 2002), and electroanalysis using ion selective electrode (Koji et al 2003;Shamsipur et al 2004;Shamsipur et al 2002) have been reported for uranium determination. Although these methods benefit from a high sensitivity and favorable detection limits, their application requires expensive equipment and involves a higher running cost.…”

Anodic Stripping Differential Pulse Voltammetric Determination of Trace Amounts of Lead after Preconcentration of Its Complex with 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol onto Natural Analcime Zeolite by Column Method

“…[17][18][19][20][21] Unfortunately, electrochemical methods for direct determination of reducible substances, requires that the solvent should have a fairly high dielectric constant so as well-defined polarogram can be obtained. In this regard, various workers have mixed the organic phase after extraction with a solvent of high dielectric constant to obtain well-defined polarograms.…”