Square-Wave Voltammetric Determination of Acetaldehyde in Povidone

1987 ◽  
Vol 70 (3) ◽  
pp. 566-568
Author(s):  
Robert M Lanniello ◽  
Regina Colonnese ◽  
Nancy Machnicki
Keyword(s):  
Direct Measurement ◽  
Square Wave Voltammetry ◽  
Aqueous Electrolyte ◽  
Accurate Method ◽  
Voltammetric Determination ◽  
Polyvinyl Pyrrolidone ◽  
Square Wave ◽  
Wave Voltammetry

Abstract A rapid, precise, and accurate method is described for the determination of acetaldehyde in povidone (polyvinyl pyrrolidone). The sample is dissolved in a basic aqueous electrolyte and analyzed using square-wave voltammetry. The proposed method allows for direct measurement of acetaldehyde under gentle conditions, thus avoiding loss of analyte due to volatility of acetaldehyde. The method is specific for acetaldehyde in the presence of other aldehydes and povidone process impurities.

Use of a membraneless extraction module for the voltammetric determination of total sulfites in wine

2010 ◽  
Vol 75 (7) ◽  
pp. 721-730 ◽  
Author(s):  
Luís Moreira Gonçalves ◽  
Miriam Franco da Anunciação ◽  
Inês Maria Valente ◽  
João Grosso Pacheco ◽  
José António Rodrigues ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Sample Preparation ◽  
Volatile Compounds ◽  
Square Wave Voltammetry ◽  
Voltammetric Determination ◽  
Voltammetric Analysis ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Good Repeatability

A recently developed membraneless extraction module (MLEM) for sample preparation aiming the analysis of volatile and semi-volatile compounds is applied in the voltammetric analysis of total sulfites in wine. Square-wave voltammetry (SWV) is very advantageous in this case because sulfur dioxide (SO2) is instrumentally directly detected. The developed method shows good repeatability (RSD lower than 5%) and linearity (between 20 to 220 mg l–1) as well as suitable limits of detection (6 mg l–1) and quantification (19 mg l–1). The proposed method was also compared with the reference methodology (an iodimetry, the Ripper method) showing no significant differences in the obtained results.

Simultaneous determination of ascorbic and uric acids and dopamine in human serum samples using three-way calibration with data from square wave voltammetry

2016 ◽  
Vol 129 ◽  
pp. 205-212 ◽  
Author(s):  
Adrian Marcelo Granero ◽  
Gastón Darío Pierini ◽  
Sebastián Noel Robledo ◽  
María Susana Di Nezio ◽  
Héctor Fernández ◽  
...  
Keyword(s):  
Human Serum ◽  
Simultaneous Determination ◽  
Square Wave Voltammetry ◽  
Serum Samples ◽  
Square Wave ◽  
Human Serum Samples ◽  
Wave Voltammetry

Square-Wave Voltammetry of Decamethylferrocene at the Three-Phase Junction Organic Liquid/Aqueous Solution/Graphite

2001 ◽  
Vol 66 (3) ◽  
pp. 434-444 ◽  
Author(s):  
Šebojka Komorsky-Lovrić ◽  
Milivoj Lovrić ◽  
Fritz Scholz
Keyword(s):  
Aqueous Solution ◽  
Linear Relationship ◽  
Square Wave Voltammetry ◽  
Aqueous Electrolyte ◽  
Graphite Electrode ◽  
Organic Liquid ◽  
Aqueous Electrolytes ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Three Phase

Drops of nitrobenzene and 1,2-dichloroethane with 0.1 M decamethylferrocene (dmfc) are attached to the surface of a paraffin-impregnated graphite electrode and immersed into various aqueous electrolytes. The oxidation of dmfc and the reduction of dmfc+ cation are enabled by simultaneous transfers of anions between the aqueous electrolyte and the organic solvents. Square-wave voltammetry of this reaction is reported. A linear relationship was observed between the peak potentials of dmfc and the standard Galvani potential differences of the anions. The influence of the anion concentration on this relation is explained.

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