Critical ReviewApproaching the use of oscillating reactions for analytical monitoring

Jiménez-Prieto, Rafael; Silva, Manuel; Pérez‐Bendito, Dolores

doi:10.1039/a703354k

Cited by 70 publications

(43 citation statements)

References 52 publications

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“…This oscillating system has a high potential for analytical determination, owing to the different responses to sample perturbation exhibited by this oscillation. 4 In this work, adding a trace amount of L-Asp can perturb the oscillating profile, implying that the L-Asp has reacted with some of components in oscillating system. Figure 1 shows typical oscillation profiles for the proposed system in the absence (I) and presence (II) of L-aspartic acid.…”

Section: Resultsmentioning

confidence: 77%

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Determination of L-aspartic acid by using the Cu(II)-catalyzed oscillating reaction

Gao¹,

Lv²,

Sun³

et al. 2009

J. Braz. Chem. Soc.

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Foi proposto um procedimento conveniente por meio de um sistema químico oscilante como uma ferramenta analítica para a determinação de ácido L-aspártico (L-Asp). O sistema envolve a reação entre peróxido de hidrogênio e tiocianato de sódio, catalizada por íons Cu(II) em meio alcalino. O método baseia-se na relação linear entre as mudanças no período de oscilação e o logarítmo da concentração de ácido L-aspártico. Condições otimizadas foram posteriormente validadas para garantir a confiabilidade do método. Sob condições otimizadas, o gráfico de calibração é linear e proporcional à concentração do ácido L-aspártico no intervalo de 1,17 × 10 -5 mol L -1 a 7,10 × 10 -8 mol L -1 com um coeficiente de regressão linear de 0,9990 e RSD de 2,75%. O limite de determinação (LOD) foi de 5,58 x 10 -8 mol L -1 . O método proposto foi empregado na determinação do ácido L-aspártico em amostras de medicamentos. Além disto, a técnica HPLC foi empregada para confirmar os resultados.A convenient procedure by means of oscillating chemical system as an analytical tool to determine the L-aspartic acid (L-Asp) is proposed. The system involves the Cu(II)-catalyzed reaction between hydrogen peroxide and sodium thiocyanate in an alkaline medium. The method relies on the linear relationship between the changes in the oscillation period and the logarithm of concentration of L-aspartic acid. Optimized conditions were further validated to ensure the reliability of the method. Under optimum conditions, the calibration plot is linearly proportional to the concentration of L-aspartic acid over the range from 1.17 × 10 -5 mol L -1 to 7.10 × 10 -8 mol L -1 with a corresponding regression coefficient of 0.9990 (RSD 2.75%). A lower limit of determination (LOD) was 5.58 × 10 -8 mol L -1 . The proposed method has been used to determine L-aspartic acid in drug sample. Additionally, the HPLC technique was also used to confirm the determination results.

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Section: Resultsmentioning

confidence: 77%

“…Compared to these methods, the application of oscillating chemical reaction for the determination of trace amounts of substances has gained interest from many analysts [4][5] because of its simplicity, largely linear range (ca. 10 -7 -10 -3 mol L -1 ), and lower detection limit (ca.…”

Section: Introductionmentioning

confidence: 99%

Determination of L-aspartic acid by using the Cu(II)-catalyzed oscillating reaction

Gao¹,

Lv²,

Sun³

et al. 2009

J. Braz. Chem. Soc.

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“…The application of oscillating chemical reaction to analytical chemistry has made a long progress during the last 20 years [1,2], in which the combination of the "continuously stirred tank reactor" (CSTR) [3] and the "analyte pulse perturbation technique" (APP) [4] was considered as a turning point. Most of organic compounds and some inorganic ions can be determined quantitatively in the range from 10 -3 to 10 -6 mol L -1 with a lower detection limit of 10 -7 mol L -1 .…”

Section: Introductionmentioning

confidence: 99%

Determination of p-nitroaniline by the tartrate-acetone-Mn2+-KBrO3-H2SO4 double organic substrate oscillating system using non-equilibrium stationary state

et al. 2009

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“…Since then, some analysts started to move their focus on the analytical potential of oscillating chemical reactions. Professor Dolores Perez-Bendito [2] has reviewed the progress of oscillating chemical reactions in analytical chemistry up until 1998. In this critical review, the basic principle of oscillating reactions, three kinds of oscillating systems, the analyte pulse perturbation technique (APP), the continuously stirred tank reactor (CSTR), as well as the analytical applications were discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Determination of p-nitrobenzene-azo-naphthol by an oscillating chemical reaction using the analyte pulse perturbation technique

et al. 2005

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A simple analytical method for the determination of p-nitrobenzene-azo-naphthol was proposed by a sequential perturbation with different amounts of p-nitrobenzene-azonaphthol on an oscillating chemical system. The method involves a Cu(II)-catalysed oscillating reaction between hydrogen peroxide and sodium thiocyanate in alkaline medium with the aid of continuous-flow stirred tank reactor (CSTR). A good linear relationship between the changes, oscillation amplitude or/and period, and the concentration of p-nitrobenzene-azo-naphthol was obtained. The use of analyte pulse perturbation technique provides a possibility of sequential determination in a same oscillating system, due to a new steady state that reappeared rapidly after each perturbation. The calibration curve fits a linear equation very well when the concentration of p-nitrobenzene-azo-naphthol ranging from 5.2×10 −7 to 3.3×10 −3 M. Influence of temperature, injection point, flow rate and reactants variables on this system were investigated in detail.

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Critical ReviewApproaching the use of oscillating reactions for analytical monitoring

Cited by 70 publications

References 52 publications

Determination of L-aspartic acid by using the Cu(II)-catalyzed oscillating reaction

Determination of L-aspartic acid by using the Cu(II)-catalyzed oscillating reaction

Determination of p-nitroaniline by the tartrate-acetone-Mn2+-KBrO3-H2SO4 double organic substrate oscillating system using non-equilibrium stationary state

Determination of p-nitrobenzene-azo-naphthol by an oscillating chemical reaction using the analyte pulse perturbation technique

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