Study on the Polarographic Catalytic Wave of Vitamin P in the Presence of Persulfate and Its Application

Song, Jun; He, Ping; Guo, Wei

doi:10.1006/abio.2001.5605

Cited by 15 publications

(7 citation statements)

References 19 publications

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“…In such polarographic catalytic wave, polarographic reduction of the reducible groups of organic compounds was simultaneous with chemical regeneration of the reducible groups through oxidation of their free radicals by oxidant on electrode surface. Recently, the polarographic catalytic waves of organic compounds such as sulfur-containing amino acid [14], protein [15][16][17][18], steroid [19], unsaturated carbonyl acid [20], flavonone [21], isoquinolinium alkaloid [22] and others in the presence of such oxidants as KIO 3 , H 2 O 2 or K 2 S 2 O 8 have been reported. Using the polarographic catalytic wave for the determination of these organic compounds, the improvement of analytical sensitivity was one or two orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Polarographic determination of diazepam with its parallel catalytic wave in the presence of persulfate

Guo

Lin

Liu

et al. 2004

Journal of Pharmaceutical and Biomedical Analysis

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Section: Introductionmentioning

confidence: 99%

Polarographic determination of diazepam with its parallel catalytic wave in the presence of persulfate

Guo

Lin

Liu

et al. 2004

Journal of Pharmaceutical and Biomedical Analysis

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“…B (d)]. The increased peak current in the presence of S 2 O 8 2− is due to chemical oxidation of CPF red by S 2 O 8 2− and SO 4 •− to the original CPF (equation 9) : …”

Section: Resultsmentioning

confidence: 99%

Cathodic electrochemiluminescence of the peroxydisulphate–ciprofloxacin system and its analytical applications

Liang

Song

2011

Luminescence

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The cathodic electrochemiluminescence (ECL) of peroxydisulphate (S(2)O(8)(2-))-ciprofloxacin (CPF) system at a wax-impregnated graphite electrode was studied. When CPF was absent, S(2)O(8)(2-) was electrochemically reduced to sulphate free radical (SO(4)(•-)), and dissolved oxygen absorbed on the electrode surface was reduced to protonated superoxide anion radical (HO(2)(•)). The HO(2)(•) was oxidized by SO(4)(•-) to produce molecular oxygen in both singlet and triplet states. Some of the singlet molecular oxygen ((1)O(2)) further combined through collision to be an energy-rich precursor singlet molecular oxygen pair ((1)O(2))(2). A weak ECL was produced when (1)O(2) or ((1)O(2))(2) was converted to ground-state molecular oxygen ((3)O(2)). When CPF was present, a stronger ECL was produced, which originated from two emitting species. The main emitting species was excited state CPF (CPF*), which was produced by accepting energy from ((1)O(2))(2). The other emitting species was excited singlet molecular oxygen pair [((1)O(2))(2)*], which originated from the chemical oxidation of CPF by SO(4)(•-) and dissolved oxygen. Based on the stronger ECL phenomenon, an ECL method for the determination of either S(2)O(8)(2-) or CPF was proposed. The proposed ECL method has been applied to the determination of CPF in pharmaceutical preparations.

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“…Some supporting electrolytes such as HAc-NaAc, sodium citrate-HCl, tartaric acid-sodium tartrate, Na 2 …”

Section: Effect Of Supporting Electrolytementioning

confidence: 99%

Polarographic Behavior of Gemfibrozil in the Presence of Dissolved Oxygen and Its Analytical Application

Song

Guo

et al. 2004

Electroanalysis

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The polarographic behavior of gemfibrozil is investigated in 0.2 mol L À1 KH 2 PO 4 -Na 2 HPO 4 (pH 5.8 AE 0.1)-8% ethanol supporting electrolyte in the absence and the presence of dissolved oxygen. The results demonstrate that the polarographic reduction peak at ca. À 1.17 V is a catalytic hydrogen wave after deaeration, and the enhanced reduction peak in the presence of dissolved oxygen is the so-called parallel catalytic hydrogen wave. Based on the parallel catalytic hydrogen wave, a novel method has been developed for the determination of gemfibrozil by single sweep polarography. Calibration plot is linear in the range of 1.8 Â 10 À7 ± 2.4 Â 10 À6 mol L À1 and detection limit is 9.0 Â 10 À8 mol L À1. The proposed method is applied to the direct determination of the gemfibrozil in pharmaceutical preparations. The proposed method is simpler, faster and more sensitive than the known methods for gemfibrozil analyses.

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Study on the Polarographic Catalytic Wave of Vitamin P in the Presence of Persulfate and Its Application

Cited by 15 publications

References 19 publications

Polarographic determination of diazepam with its parallel catalytic wave in the presence of persulfate

Polarographic determination of diazepam with its parallel catalytic wave in the presence of persulfate

Cathodic electrochemiluminescence of the peroxydisulphate–ciprofloxacin system and its analytical applications

Polarographic Behavior of Gemfibrozil in the Presence of Dissolved Oxygen and Its Analytical Application

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