Improved voltammetric method for simultaneous determination of Pt and Rh using second derivative signal transformation – application to environmental samples

Monteiro, Carolino; Cobelo-Garcı́a, Antonio; Caetano, Miguel; Santos, Margarida M. Correia dos

doi:10.1016/j.talanta.2017.06.067

Cited by 12 publications

(10 citation statements)

References 31 publications

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“…As to elemental characterization, total carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) were determined using a TruSpec CHNS micro analyser (LECO). The instrument is a dry combustion type with infrared detection for CHS and thermal conductivity detection for N. As to Pt and Rh, both elements were determined after acid-digestion in aqua regia by AdCSV, as previously described in Monteiro et al (2017). The quantification of Pt and Rh was done using the standard addition method.…”

Section: Road Dust Characterizationmentioning

confidence: 99%

“…The truly dissolved fraction of Pt and Rh was determined by AdCSV following the procedure optimized previously (Monteiro et al, 2017). Briefly, voltammetric determinations were performed in an Autolab PGSTAT 12 (Metrohm) connected to the VA stand model 663 (Metrohm).…”

Section: Determination Of Truly Dissolved Pt and Rh In The Leachatesmentioning

confidence: 99%

“…Adsorptive cathodic stripping voltammetry (AdCSV) enables the determination of truly dissolved Pt in aquatic systems, like estuaries (Cobelo-García et al, 2013) and the ocean (López-Sánchez et al, 2019). Only recently dissolved Rh concentrations in water samples were reported (Monteiro et al, 2017). In this work, we innovate by combining analytical methods to provide a better insight into the speciation analysis of Pt and Rh.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Speciation analysis of Pt and Rh in urban road dust leachates

Monteiro

Cobelo-Garcı́a

Caetano

et al. 2020

Science of The Total Environment

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Section: Road Dust Characterizationmentioning

confidence: 99%

Section: Determination Of Truly Dissolved Pt and Rh In The Leachatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Speciation analysis of Pt and Rh in urban road dust leachates

Monteiro

Cobelo-Garcı́a

Caetano

et al. 2020

Science of The Total Environment

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“…Surface water drainage effluents from hospitals with an oncology ward contain patient excretions of Pt-based anticancer drugs and display Pt concentrations that could exceed natural inputs (Vyas et al 2014). Monteiro et al (2017) evaluated Pt D concentrations in the inflow and outflow of a wastewater treatment plant (WWTP) in Lisbon as ,5 and 15 ng L À1 respectively after a dry weather period and ,10 and 25 ng L À1 after a rain event. In the western part of the Genoa Harbor, Pt inputs from sewage treatment plants reach the Polcevera river mouth (Fig.…”

Section: Hospital and Sewage Effluentsmentioning

confidence: 99%

Spatial variability and sources of platinum in a contaminated harbor – tracing coastal urban inputs

Abdou¹,

Schäfer²,

Gil-Díaz³

et al. 2020

Environ. Chem.

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Environmental context. Emerging contaminants such as platinum are continuously released into aquatic environments. Analytical challenges, however, have restricted information on their geochemical cycles. We examine the potential use of platinum as a tracer of anthropogenic inputs in a model industrial/urban site (Genoa Harbor, Italy), and provide a first estimate of dissolved platinum baseline concentrations in the northern Mediterranean coast.Abstract. Biogeochemical cycles that include processes to control platinum (Pt) distribution remain widely unknown in aquatic environments, especially in coastal systems. Dissolved Pt concentrations in coastal seawater (Pt D ) and in suspended particulate matter (SPM, Pt P ) were measured, together with master variables comprising dissolved oxygen, dissolved and particulate organic carbon, chlorophyll-a, turbidity, and ammonium levels, along two longitudinal profiles in the industrial Genoa Harbor (north-west Italy). Concentrations and spatial distribution of Pt D and Pt P levels reflect distinct concentration gradients that were attributed to different Pt sources such as hospital, domestic and industrial wastewater, atmospheric deposition, and/or road runoff. Concentrations reaching up to 0.18 ng L À1 Pt D and 14 ng g À1 Pt P reflect the impact of Pt urban inputs to coastal sites. These first data highlight considerable anthropogenic contamination in a confined harbor compared with the proposed reference value for the western Mediterranean surface seawater measured at external sites. Identified correlations between Pt levels and human pollution signals suggest the potential use of Pt as a new tracer of anthropogenic inputs that can be applied to other urbanised coastal systems. Biogeochemical processes that induce changes in the partitioning and fate of Pt in coastal seawater reflect a spatial variability and highlight the need for comprehensive environmental monitoring at an appropriate spatial scale.

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“…We used the secondderivative transformation signal as it was more efficient in eliminating the background interferences. (20)…”

Section: Measurement Proceduresmentioning

confidence: 99%

Label-free Amperometric Immunosensor for Quantitative Detection of Low-concentration Brucellapositive Standard Serum

Yang¹,

Zhang²,

Song³

et al. 2019

Sensors and Materials

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Brucella bacteria are widely distributed throughout the world causing huge losses in agriculture and threatening human health through zoonotic infection. In this article, a label-free amperometric immunosensor for the quantitative detection of a low-concentration Brucellapositive standard serum was developed to identify diseased livestock earlier and thereby reduce economic losses. The developed immunosensor consists of a screen-printed gold electrode (SPGE) and a signal-acquiring interface. The SPGE was first functionalized with cysteamine for the immobilization of Brucella melitensis. Then, Brucella-positive standard sera of various concentrations were introduced dropwise onto the surface of the electrode and captured by B. melitensis. This resulted in current changes that could be measured with differential pulse and square wave voltammetries in the electrolyte solution using an electrochemical workstation. There was a linear relationship between the variation in peak current and the logarithmic value of Brucella-positive standard serum concentrations from 1 × 10 −5 to 1 × 10 2 IU/mL. Furthermore, the second-derivative transformation was applied, and the optimized linear correlation between the variation in peak value and the corresponding Brucella-positive standard serum concentration was established. Moreover, the regression equation has a lower detection limit, a higher goodness of fit, and a smaller residual sum of squares.

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Improved voltammetric method for simultaneous determination of Pt and Rh using second derivative signal transformation – application to environmental samples

Cited by 12 publications

References 31 publications

Speciation analysis of Pt and Rh in urban road dust leachates

Speciation analysis of Pt and Rh in urban road dust leachates

Spatial variability and sources of platinum in a contaminated harbor – tracing coastal urban inputs

Label-free Amperometric Immunosensor for Quantitative Detection of Low-concentration Brucellapositive Standard Serum

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