Electrogenerated Chemiluminescence (ECL) Determination of Ephedrine with a Self-Assembly Multilayer Ni(II)-Polyluminol Modified Electrode

Li, Guixin; Zheng, Xusheng; Zhang, Zhujun

doi:10.1007/s00604-005-0480-y

Cited by 13 publications

(6 citation statements)

References 47 publications

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“…Obviously, the ECL intensities in the presence of palmatine were increased with the increase of surface hydrophobicity (34,35). It was reported that the micro‐environment of the electrode surface not only strongly affected the electrochemical reaction, but also affected the subsequent CL reaction (36,37). In the present work, the hydrophobic micro‐environment of the vaseline‐impregnated anode surface might not have decreased the formation rate of OH • , but could decrease the recombination rate of two [O] to form 1 O 2 due to weak interaction between [O] and the vaseline‐impregnated anode surface (37–39), which facilitated more palmatine base to be chemically oxidized by electrogenerated OH • .…”

Section: Resultsmentioning

confidence: 99%

“…It was reported that the micro‐environment of the electrode surface not only strongly affected the electrochemical reaction, but also affected the subsequent CL reaction (36,37). In the present work, the hydrophobic micro‐environment of the vaseline‐impregnated anode surface might not have decreased the formation rate of OH • , but could decrease the recombination rate of two [O] to form 1 O 2 due to weak interaction between [O] and the vaseline‐impregnated anode surface (37–39), which facilitated more palmatine base to be chemically oxidized by electrogenerated OH • . Because both the lowest background ECL intensity and the highest ECL intensity in the presence of palmatine were produced at the vaseline‐impregnated graphite anode, this anode was selected for use throughout the experiment.…”

Section: Resultsmentioning

confidence: 99%

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Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Liang

Song

2011

Luminescence

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A strong electrochemiluminescence (ECL) of palmatine in NaOH medium was observed at a vaseline-impregnated graphite anode. The ECL production could be described as follows: hydroxyl radical (OH(•)) was generated via the oxidation of hydroxyl group (OH(-)) in NaOH medium, and the formed OH(•) subsequently oxidized palmatine base converted from palmatine in NaOH medium to the excited state oxypalmatine (oxypalmatine*). As the oxypalmatine* went back to its ground state, a stronger chemiluminescence was produced. Based on the ECL of palmatine, an ECL method for the determination of palmatine was proposed. An ECL signal of palmatine in NaOH solution was obtained by applying direct current of 15 mA to the vaseline-impregnated graphite anode. The ECL intensity was rectilinear with palmatine concentration in the range of 8.0 × 10(-7) to 2.0 × 10(-5) mol l(-1) and the limit of detection (signal-to-noise = 3) was 3 × 10(-7) mol l(-1) . The proposed method was applied to the determination of palmatine in pharmaceutical preparations.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Liang

Song

2011

Luminescence

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“…The ECL in the absence and the presence of CPF increased in the same order: bare glassy carbon cathode ≈ bare graphite cathode < wax-impregnated graphite cathode. It was reported that the micro-environment of the electrode surface not only strongly effected the electrochemical reaction but also effected the subsequent CL reaction (50). In the present study, the hydrophobic environment at the waximpregnated cathode surface may not only prolong the lifespan of active species such as SO 4 •− , HO 2 • , and 1 O 2 (51), which results in the increase of yield of 1 (O 2 ) 2 , but may also facilitate energy transfer from 1 (O 2 ) 2 to CPF.…”

Section: Optimization Of Analytical Conditionsmentioning

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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“…The electrochemiluminescent (ECL) generation of Ru(III) complexes is receiving a lot of interest due to the favourable characteristics of these species, such as excellent chemical stability, high emission quantum yield and long lifetime of the excited state (15,(25)(26)(27)(28)(29)(30)(31)(32). The major limitations of ECL are those associated with electrodes, such as fouling, and the need for reconditioning of the electrode surface to sustain a constant CL signal.…”

Section: +mentioning

confidence: 99%

Chemiluminescence determination of chlorpheniramine using tris(1,10‐phenanthroline)–ruthenium(II) peroxydisulphate system and sequential injection analysis

et al. 2008

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] and a peristaltic pump to propel the sample. The experimental conditions affecting the chemiluminescence reaction were systematically optimized, using the univariate approach. Under the optimum conditions linear calibration curves of 0.1-10 mg/ml were obtained. The detection limit was 0.04 mg/ml and the relative standard deviation (RSD) was always < 5%. The procedure was applied to the analysis of CPA in pharmaceutical products and was found to be free from interferences from concomitants usually present in these preparations.

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Electrogenerated Chemiluminescence (ECL) Determination of Ephedrine with a Self-Assembly Multilayer Ni(II)-Polyluminol Modified Electrode

Cited by 13 publications

References 47 publications

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

Electrochemiluminescence of palmatine being oxidized by electrogenerated hydroxyl radical and its analytical application

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

Chemiluminescence determination of chlorpheniramine using tris(1,10‐phenanthroline)–ruthenium(II) peroxydisulphate system and sequential injection analysis

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