Determination of folic acid by chemiluminescence based on peroxomonosulfate-cobalt(II) system

Zhang, Bo-Tao; Zhao, Lixia; Lin, Jin‐Ming

doi:10.1016/j.talanta.2007.08.027

Cited by 119 publications

(63 citation statements)

References 29 publications

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“…The terms folic acid and folates are often used interchangeably, but folic acid is approximately twice as bioavailable as the folates [3]. Analytical methods for folic acid include bioassays [4], enzymatic methods [5], fluorimetry [6][7][8][9][10][11][12][13], spectrophotometry [14][15][16], chromatography [17][18][19][20][21][22][23][24][25], chemiluminescence [26][27][28], phosphorimetry [29] and inductively coupled plasmaatomic emission spectroscopy [30]. Electrochemical methods have been used to detect folic acid [31][32][33][34][35][36][37][38][39][40][41][42] and to investigate its redox properties [43].…”

Section: Introductionmentioning

confidence: 99%

Folic acid Determination in neutral pH electrolyte by Adsorptive Stripping Voltammetry at the Mercury Film Electrode

Farias¹

2012

iosrphr

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A stripping method for the determination of folic acid at the submicromolar concentration levels is described. The method is based on controlled adsorptive accumulation of folic acid at the hanging mercury drop electrode followed by differential pulse measurement of the adsorbate. The adsorptive stripping response was evaluated with respect to concentration dependence, accumulation time, accumulation potential, scan-rate, size of the mercury drop, pH, ionic strength, presence of possible interferences and other variables. Cyclic voltammograms at pH 7.1(0.2 mol.L -1 KH 2 PO 4 / NaOH buffer solution) showed four cathodic peaks at -0.57, -0.75, -1.18 and -1.39 V. The second peak, (at -0.75 mV), was the most useful for analytical purposes (more sensitive, quasi reversible and well defined) and it was used for quantifying folic acid by differential pulse adsorptive stripping voltammetry in four types of pharmaceutical multivitamin preparations. Sequential determination of folic acid with ascorbic acid is also possible. The results obtained in analysing medicines having folic acid as active constituent were compared favourably with those obtained by HPLC with UV detection. The average content of folic acid found in these medicines by HPLC was 4.81±0.09mg and by voltammetry, 4.87±0.09mg. The proposed method is very simple, efficient and does not involve time-consuming separation steps.

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Section: Introductionmentioning

confidence: 99%

Folic acid Determination in neutral pH electrolyte by Adsorptive Stripping Voltammetry at the Mercury Film Electrode

Farias¹

2012

iosrphr

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“…In recent years, several methods for the determination of FA have been reported, including high-performance liquid chromatography (HPLC), [4][5][6][7][8][9] chemiluminescence (CL), [10][11][12] spectrophotometric, 13,14 electroanalytical, [15][16][17] and fluorometric methods. 18,19 However, HPLC technique has superiority in terms of separating and quantifying different forms of FA with the minimum interference from enzymes but it involves complicated system operation and maintenance, high consumption of samples and expensive reagents.…”

Section: 2mentioning

confidence: 99%

Europium-Enoxacin Complex as Fluorescence Probe for the Determination of Folic Acid in Pharmaceutical and Biological Samples

Alam¹,

Kamruzzaman²,

Lee³

et al. 2012

Bulletin of the Korean Chemical Society

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A simple, rapid and sensitive spectrofluorometric method was developed for the determination of folic acid (FA), based on its quenching effect on the fluorescence intensity of enoxacin (ENX)-europium (Eu 3+) complex as a fluorescent probe. Fluorometric interaction between ENX-Eu 3+ complex and FA was studied using UVvisible and fluorescence spectroscopy. The quenched fluorescence intensity at an emission wavelength of 614 nm was proportional to the concentration of FA. Optimum conditions for the determination of FA were investigated. Under optimal conditions, the reduced fluorescence intensity at 614 nm was responded linearly with the concentration of FA. The linearity was maintained in the range of 1.25 × 10 −9 to 1.50 × 10 −7 M (R = 0.9986) with the limit of detection (3S b /m) (where S b is the standard deviation of blank and m is the slop of linear calibration curve) of 6.94 × 10 −10 M. The relative standard deviation (RSD) for 9 repeated measurements of 1.0 × 10 −9 M FA was 1.42%. This method was simple, cost effective, and relatively free of interference from coexisting substances. Successful determinations of FA in pharmaceutical formulation and biological samples with the developed method were demonstrated.

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“…Flow-injection chemilluminescence(CL) methods are powerful analytical techniques that have been frequently used for the analysis of pharmaceuticals in recent years and have excellent sensitivity, wide linear dynamic range, a high degree of reproducibility, which requires relatively simple and inexpensive instrumentation [22][23][24][25]. To the best of our knowledge, up to the present time, nothing has been published concerning the determination of tramadol with a flow injection CL method.…”

Section: Introductionmentioning

confidence: 99%

Flow Injection Determination of Tramadol Based on Its Sensitizing Effect on the Chemiluminescent Reaction of Permanganate-Sulfite

Yao¹,

Zhang²,

Li³

2011

AJAC

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In this paper, a novel chemiluminescence (CL) method for the determination of tramadol has been developed by combining the flow injection technique and its sensitizing effect on the weak CL reaction between sulfite and acidic KMnO 4 . A mechanism for the CL reaction has been proposed on the basis of fluorescent and CL spectra. Under the optimized conditions, the proposed method allows the measurement of tramadol hydrochloride over the range of 0.04 -4 g/mLwith a correlation coefficient of 0.9995 (n = 8) and a detection limit of 0.01 g/mL (3σ), and the relative standard deviation for 2.0 g/mL tramadol (n = 11) is 2.1%. The utility of this method was demonstrated by determining tramadol hydrochloride in tablets and injections.

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Determination of folic acid by chemiluminescence based on peroxomonosulfate-cobalt(II) system

Cited by 119 publications

References 29 publications

Folic acid Determination in neutral pH electrolyte by Adsorptive Stripping Voltammetry at the Mercury Film Electrode

Folic acid Determination in neutral pH electrolyte by Adsorptive Stripping Voltammetry at the Mercury Film Electrode

Europium-Enoxacin Complex as Fluorescence Probe for the Determination of Folic Acid in Pharmaceutical and Biological Samples

Flow Injection Determination of Tramadol Based on Its Sensitizing Effect on the Chemiluminescent Reaction of Permanganate-Sulfite

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