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

Guo, Wei; Lin, Hong; Liu, Limin; Song, Junfeng

doi:10.1016/j.jpba.2003.12.006

Cited by 26 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 A variety of analytical methods have been developed for the determination of this drug in both pharmaceutical and biological samples, such as spectrophotometry, [3][4][5][6] different chromatographic methods (HPLC, LC/MS, GC, GC/MS, and TLC), [7][8][9][10][11] dispersive liquid-liquid microextraction, 12 capillary electrophoresis, 2 radioimmunoassay 13 and electrochemical methods. [14][15][16][17][18][19] Among these methods, electrochemical techniques are a powerful and versatile analytical technique that offers high sensitivity, accuracy, and precision as well as a large linear dynamic range, with relatively low-cost instrumentation than other methods. 20 Selection the type of working electrode materials is an important factor in electrochemical experiments.…”

Section: Introductionmentioning

confidence: 99%

Electroanalytical determination of diazepam in tablet and human serum samples using a multiwalled carbon nanotube embedded molecularly imprinted polymer-modified carbon paste electrode

Hosseini

Motaharian

2015

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Electroanalytical determination of diazepam in tablet and human serum samples using a multiwalled carbon nanotube embedded molecularly imprinted polymer-modified carbon paste electrode

Hosseini

Motaharian

2015

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Solution: 1.5 Â 10 26 mol/l hemin þ 1 Â 10 22 mol/l K 2 S 2 O 8 þ pH 9.5 NH 3 -NH 4 Cl; Other conditions as in Fig. 1. scan rate v (Guo et al 2004). The current function for the original reduction wave P 1 was stable when scan rate increased in the range of 100 -700 mV/s (Fig.…”

Section: Mechanism Of Parallel Catalytic Wavementioning

confidence: 90%

“…Peak P is about 20 times peak P 1 . Oxidant K 2 S 2 O 8 plays an important role in the formation of peak P. It has been proved that K 2 S 2 O 8 can act as an active oxidant of parallel catalytic wave (Guo et al 2004;Li et al 2004). Hence, peak P could be a new parallel catalytic wave of hemin.…”

Section: Parallel Catalytic Wave Of Heminmentioning

confidence: 99%

Determination of Hemin using a Parallel Catalytic Reduction Wave of its Protoporphyrin IX Ring

Luo

2007

Analytical Letters

View full text Add to dashboard Cite

Hemin, iron (III) protoporphyrin IX chloride, in NH 3 -NH 4 Cl buffer solution of pH 9.5 produces an insensitive reduction wave at about 20.70 V (vs. saturated calomel reference electrode, SCE) by using single sweep polarography. Adding oxidant K 2 S 2 O 8 to the solution, hemin reduction wave is catalyzed, yielding a parallel catalytic wave. The catalytic current is 20 times of hemin original reduction current. The derivative peak height is linearly proportional to the hemin concentration in the range of 7.5 Â 10 28 to 4.5 Â 10 26 mol/l, the detection limit is 5.0 Â 10 28 mol/l. Serum albumin, common amino acids, and metal ions have no interference with the hemin determination. The proposed method has been applied to the determination of hemin content in oral liquid samples with satisfactory results. The parallel catalytic wave is attributed to the catalytic reduction of porphyrin ring of hemin at the dropping mercury electrode. The new method could be useful in biochemical, clinical, and pharmaceutical analysis.

show abstract

“…CV is the first technique enforced in an electrochemical inspection based on potential control and is more applicable in the study of redox reactions [24]. It is the most proficient electroanalytical tool for the analysis of drugs and biologically active compounds [25][26][27]. The present work gives the new voltammetric technique for the individual and simultaneous determination of IC, MO, and TZ.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2019

RJLBPCS

View full text Add to dashboard Cite

An electrocatalytic method was developed for the acute and selective determination of Indigo carmine (IC) using poly (Adenine) fabricated carbon nanotube paste electrode (PAMCNTPE). This modified electrode delineated the excellent current sensitivity towards the redox reaction of IC compared to bare carbon nanotube paste electrode (BCNTPE). Cyclic voltammetry (CV) study disclosed that this PAMCNTPE have quasi-reversible redox behavior in electrolyte solution. The electron transition kinetics on the electrode has been evaluated along with the variation of scan rate, concentration and pH. The surface morphology of the electrodes were characterized using field emission scanning electron microscopy (FESEM). The single and simultaneous determination of IC, Methyl Orange (MO)and Tartrazine (TZ) was executed using CV. The electrocatalytic behavior of IC at BCNTPE and PAMCNTPE in differential pulse voltammetry (DPV) was inspected. The calibration curve for IC gives a linear response in the range of 8×10 -6 to 1.3×10 -4 M in 0.2 M Phosphate buffer solution (PBS) at pH 8.0 with detection limit (LOD) 2.7×10 -7 M and limit of quantification (LOQ) 9.3×10 -7 M. The fabricated electrode exhibited high sensitivity, selectivity, stability and was successfully adapted for the determination of IC in the real sample.

show abstract

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

Cited by 26 publications

References 22 publications

Electroanalytical determination of diazepam in tablet and human serum samples using a multiwalled carbon nanotube embedded molecularly imprinted polymer-modified carbon paste electrode

Electroanalytical determination of diazepam in tablet and human serum samples using a multiwalled carbon nanotube embedded molecularly imprinted polymer-modified carbon paste electrode

Determination of Hemin using a Parallel Catalytic Reduction Wave of its Protoporphyrin IX Ring

Untitled

Contact Info

Product

Resources

About