Ozone oxidation of organic sequestering agents in water prior to the determination of trace metals by anodic stripping voltammetry

“…The application of ozone as a digestion agent can also be an effective strategy to destroy dissolved organic matter prior to the determination of trace metal by voltammetry. 21,22 However, depending on sample organic load, dilution can be necessary to complete ozonolysis in a suitable time of digestion, 22 affecting the detectability of the determination. Thus, the proposed UV-digestion of the effluent samples can be used as an alternative sample pretreatment procedure, reducing the volume of reagents and the time of pretreatment.…”

Section: Sample Preparationmentioning

confidence: 99%

UV-Assisted Digestion of Petrochemical Industry Effluents Prior to the Determination of Zn, Cd, Pb and Cu by Differential Pulse Anodic Stripping Voltammetry

Domingos

Neta

Massa

et al. 2016

Journal of the Brazilian Chemical Society

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A petrochemical effluent is usually a matrix of very high complexity and composition variability, requiring robust and suitable methods for routine analysis. In this paper, the feasibility of applying a voltammetric technique for the determination of metals species in the petrochemical industry effluent was demonstrated after UV-assisted digestion procedure. Voltammetric (electrolyte volume, deposit time, pulse time, pulse amplitude and scan rate) and digestion variables (hydrogen peroxide volume, nitric acid volume and digestion time) were studied using a 2-level factorial design. The developed voltammetric method using anodic stripping voltammetry (ASV) presented limits of quantification of 11, 5, 15 and 5 µg L −1 for Zn, Cd, Pb and Cu, respectively, and was effective to analyze petrochemical effluents after UV-digestion.

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“…However, to eliminate the effect of adsorption, removal or destruction of organic matter is desirable prior to the stripping analysis of organic-rich samples. This is usually accomplished using ultraviolet irradiation or ozone oxidation procedures [30,31]. Both of which take a long time.…”

Section: Introductionmentioning

confidence: 99%

“…The use of potassium iodine to eliminate organic matrix in ASV is also known [35]. For samples low in dissolved organics, the standard additions method was used to correct the effect of organic interference [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Simple, insensitive to environmental matrix interferences method of trace cadmium determination in natural water samples

Adamczyk

Grabarczyk

2019

Ionics

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A simple, fast, and inexpensive anodic stripping voltammetric procedure for trace determination of cadmium in natural water samples containing high concentrations of surface-active substances was described. It was proved that interferences from the organic matrix such as surface-active substances could be removed by the addition of Amberlite XAD-7 resin to the analyzed sample prior to the voltammetric measurement. A renewable mercury film silver-based electrode (Hg(Ag)FE) was used as the working electrode. The following optimum conditions were found: 0.1 mol L −1 acetic acid, accumulation potential of − 0.8 V, and accumulation time of 30 s. The linear range of Cd(II) was observed over the concentration range from 5 × 10 −8 mol L −1 to 6 × 10 −5 mol L −1 , with a correlation coefficient equal to 0.997. The detection limit of Cd(II) for preconcentration time of 30 s was 1.3 × 10 −8 mol L −1 . The proposed procedure was successfully tested for the detection of cadmium in different non-pretreated and non-deaerated real water samples.

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Ozone oxidation of organic sequestering agents in water prior to the determination of trace metals by anodic stripping voltammetry

Cited by 44 publications

References 25 publications

Pseudopolarographic determination of metal complex stability constants in dilute solution by rapid scan anodic stripping voltammetry

Pseudopolarographic determination of metal complex stability constants in dilute solution by rapid scan anodic stripping voltammetry

UV-Assisted Digestion of Petrochemical Industry Effluents Prior to the Determination of Zn, Cd, Pb and Cu by Differential Pulse Anodic Stripping Voltammetry

Simple, insensitive to environmental matrix interferences method of trace cadmium determination in natural water samples

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