2022
DOI: 10.3390/s22218209
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Supporting Electrolyte Manipulation for Simple Improvement of the Sensitivity of Trace Vanadium(V) Determination at a Lead-Coated Glassy Carbon Electrode

Abstract: The paper presents a very simple way to extremely improve the sensitivity of trace V(V) determination. The application of a new supporting electrolyte composition (CH3COONH4, CH3COOH, and NH4Cl) instead of the commonly used acetate buffer (CH3COONa and CH3COOH) significantly enhanced the adsorptive stripping voltammetric signal of vanadium(V) at the lead-coated glassy carbon electrode (GCE/PbF). A higher enhancement was attained in the presence of cupferron as a complexing agent (approximately 10 times V(V) si… Show more

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Cited by 3 publications
(13 citation statements)
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“…The complexing agents used in the voltammetric analysis of vanadium are listed in Table 1 , together with the detection limits obtained. The most commonly chosen complexing agent in voltammetric procedures for the determination of vanadium is cupferron [ 45 , 46 , 47 , 48 , 49 , 50 ]. Other complexing agents are also used, such as chloranilic acid [ 51 , 52 , 53 , 54 ], catechol [ 55 ], chromoxane cyanine R [ 56 ], alizarin violet [ 57 ], pyrocatechol [ 58 ], 2,3–dihydroxybenzaldehyde [ 59 ], galic acid [ 60 ], pyrogallol [ 61 ], quertic–5–sulfonic [ 62 ] and 2,3–dihydroxynaphthalene [ 63 ].…”
Section: Adsorptive Stripping Voltammetry Of Vanadiummentioning
confidence: 99%
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“…The complexing agents used in the voltammetric analysis of vanadium are listed in Table 1 , together with the detection limits obtained. The most commonly chosen complexing agent in voltammetric procedures for the determination of vanadium is cupferron [ 45 , 46 , 47 , 48 , 49 , 50 ]. Other complexing agents are also used, such as chloranilic acid [ 51 , 52 , 53 , 54 ], catechol [ 55 ], chromoxane cyanine R [ 56 ], alizarin violet [ 57 ], pyrocatechol [ 58 ], 2,3–dihydroxybenzaldehyde [ 59 ], galic acid [ 60 ], pyrogallol [ 61 ], quertic–5–sulfonic [ 62 ] and 2,3–dihydroxynaphthalene [ 63 ].…”
Section: Adsorptive Stripping Voltammetry Of Vanadiummentioning
confidence: 99%
“…In the papers [ 45 , 46 ], the concentration of cupferron was optimized in the range from 5 × 10 −6 mol L −1 to 4 × 10 −5 mol L −1 , with a concentration of 2 × 10 −5 mol L −1 used for further research. It turned out that the concentration selected as the most optimal in the works [ 47 , 48 ] was 7 × 10 −5 mol L −1 . The lowest concentration of cupferron 8 × 10 −5 mol L −1 was used in the work [ 49 ], while the highest concentration of 1 × 10 −3 mol L −1 was selected in the vanadium determination procedure using BiµFE as the working electrode [ 47 ].…”
Section: Adsorptive Stripping Voltammetry Of Vanadiummentioning
confidence: 99%
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