Trace determination of cobalt ion by using malic acid–malonic acid double substrate oscillating chemical system

Wang, Jie; Yang, Wu; Ren, Jie; Guo, Miao; Chen, Xiao; Wang, Wen Bin; Gao, Jin Zhang

doi:10.1016/j.cclet.2008.06.012

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…U tabeli 1 sumarno su prikazani parametri određivanja koji obuhvataju oblasti koncentracija i statističke podatke dobijene regresionom analizom**. Dobri korelacioni koeficijenti (r ≥ ≥ 0,99) ukazuju na linearnost kalibracionih dijagrama u širokom opsegu koncentracija (dva [46,47,51,53,56,60, 66−69,71−73] i tri reda veličine [52,54,57,59,70], a u nekim slučajevima i četiri [55,58,75]). Može se videti da je metoda izuzetno osetljiva*** (LOD vrednosti su od ≈10 −9 mol L −1 do 10 −6 mol L −1 , ali i 5×10 −13 mol L −1 [58]), precizna 4 * (RSD ≤ 5 %) i tačna 5 * (RCV < 102 %).…”

Section: Određivanje Niskih Koncentracija Analita Primenom Pulsne Perunclassified

“…U ovom slučaju je korišćena konduktometrijska detekcija; g ΔA r i ΔP r je relativna promena amplituda ((A-A 0 )/A 0 ) i perioda oscilovanja ((P-P 0 )/P 0 ), respektivno;h ΔE m je maksimalna promena potencijala (E p − E s ) gde su A 0 i A amplitude oscilacija* pre i nakon dodatka analita u matricu (slika 3). Takođe, analitički signal može biti promena perioda oscilovanja, (ΔP)[51,54,58,59, 68,70−72,74,su P 0 i P periodi** oscilovanja pre i nakon dodatka analita u matricu.Iz navedenih signala su, kao kvantitativna karakteristika matrica, izvedeni bezdimenzioni parametri, kao što su relativna promena amplitude oscilovanja,…”

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Analytical applications of oscillatory chemical reactions: Determination of some pharmaceuticaly and biologically important compounds

Pejic

Anic²,

Kolar-Anic

2012

Hem Ind

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Novel analytical methods for quantitive determination of analytes based on perturbations of oscillatory chemical reactions realized under open reactor conditions (continuosly fed well stirred tank reactor, CSTR), have been developed in the past twenty years. The proposed kinetic methods are generally based on the ability of the analyzed substances to change the kinetics of the chemical reactions matrix. The unambiguous correlation of quantitative characteristics of perturbations, and the amount (concentration) of analyte expressed as a regression equation, or its graphics (calibration curve), enable the determination of the unknown analyte concentration. Attention is given to the development of these methods because of their simple experimental procedures, broad range of linear regression ( 10-7 10-4 mol L-1) and low limits of detection of analytes ( 10-6 10-8 mol L1, in some cases even lower than 10-12 mol L-1). Therefore, their application is very convenient for routine analysis of various inorganic and organic compounds as well as gases. This review summarizes progress made in the past 5 years on quantitative determination of pharmaceutically and biologically important compounds

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Section: Određivanje Niskih Koncentracija Analita Primenom Pulsne Perunclassified

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Analytical applications of oscillatory chemical reactions: Determination of some pharmaceuticaly and biologically important compounds

Pejic

Anic²,

Kolar-Anic

2012

Hem Ind

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“…Zhabotinskii [8] found a linear correlation between the reactant concentration and the period of the BZ reaction and proposed the use of this phenomenon for chemical analysis. Oscillating chemical reactions were also used for the determination of cobalt cation [9] and antioxidant activity of natural phenolic compounds [10]. Several studies have also been performed illustrating the possibility of analytical applications of regular chemical oscillations [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study of the BZ oscillating system in the presence of silica nanoparticles containing NiO using a new approach: Conductometry

2016

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Oscillating chemical reactions are complex systems involving a large number of chemical species, such as ionic, radical, and molecular intermediates, which exhibit uctuation in their concentration with time. One of the oscillating chemical reactions is BZ fH 2 SO 4-KBrO 3-CH 2 (COOH) 2-Ce(IV)g system. In this work, for the rst time, a new, simple, and appropriate method, i.e. conductometry, was applied to the investigation of BZ oscillating system. Furthermore, presence of SiO 2 nanoparticles containing NiO apparently a ected the intensity and period of BZ system. The e ect of varying concentration of H 2 SO 4 , KBrO 3 , CH 2 (COOH) 2 , and Ce(IV) on the conductance of BZ oscillating chemical system at 20 (0.1) C was also investigated. The obtained results of this work indicated that rather than potential and color of the BZ system, the conductance of system also oscillates during the reaction and is also proportional to the reactants concentration as well. The intensity and period of the oscillation are strongly dependent on the concentration of reactants.

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Selective Adsorption of Co(II) Ions by Whisker Surface Ion‐Imprinted Polymer: Equilibrium and Kinetics Modeling

et al. 2010

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Based on sodium trititanate whisker as support particles, the surface ion-imprinted polymer (S-IIP) was synthesized for the selective adsorption of Co(II) ions from aqueous solution. Characterization of S-IIP was achieved by FTIR spectra and SEM micrographs. Kinetic properties were successfully investigated by the pseudo-first-order model and pseudo-second-order model, and a chemisorption process as the essential adsorption step was also proposed. Equilibrium data were fitted with the Langmuir, Dubinin-Radushkevich and Freundlich isotherm equations, and the maximum adsorption amount of monolayer saturation for S-IIP was 33.75 mg/g at 298 K. Moreover, dimensionless separation factor R L (R L ＜1.0) indicated a highly favourable adsorption system between Co(II) ions and S-IIP. Selectivity experiments showed that selective adsorption of Co(II) ions for S-IIP was significantly higher than that of non-imprinted polymer (NIP).

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Trace determination of cobalt ion by using malic acid–malonic acid double substrate oscillating chemical system

Cited by 8 publications

References 6 publications

Analytical applications of oscillatory chemical reactions: Determination of some pharmaceuticaly and biologically important compounds

Analytical applications of oscillatory chemical reactions: Determination of some pharmaceuticaly and biologically important compounds

Study of the BZ oscillating system in the presence of silica nanoparticles containing NiO using a new approach: Conductometry

Selective Adsorption of Co(II) Ions by Whisker Surface Ion‐Imprinted Polymer: Equilibrium and Kinetics Modeling

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