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Risso F.,Regional Agency for Environmental Protection Liguria ARPAL | Narizzano R.,Regional Agency for Environmental Protection Liguria ARPAL | Ottonelli M.,University of Genoa | Magherini A.,Regional Agency for Environmental Protection Liguria ARPAL | And 2 more authors.
Analytical Methods | Year: 2012

A scheme for validation of subsampling activities and assessment of granulometry distribution uncertainty has been developed. The study has been performed to ensure the representativity of the aliquot, the subsample, selected for the analytical procedure with respect to the field sample and final results. The procedure developed provides an easily accessible empirical method based on repeated measurements. The uncertainty and its consequences on analytical results have been evaluated. Different soil typologies have been tested. © The Royal Society of Chemistry 2012.


Capelli C.,Regional Agency for Environmental Protection Liguria ARPAL | Foppiano D.,Regional Agency for Environmental Protection Liguria ARPAL | Venturelli G.,Regional Agency for Environmental Protection Liguria ARPAL | Carlini E.,Regional Agency for Environmental Protection Liguria ARPAL | And 2 more authors.
Analytical Letters | Year: 2014

An analytical method for the quantification of toxic metals in face-powders is presented and discussed. Acid digestion with HNO3-H2O2 or HNO3-HCl was performed and compared with total digestion by HF. The digestion with HNO3-H2O2 was the most suitable for these purposes. Analyses were performed by inductively coupled plasma atomic emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS), whose performances were compared by analyzing three different certified reference materials. The analysis of five commercial face-powders revealed the presence of all the considered metals in the range 0.06-8.0 μg/g. To simulate the bioaccessibility of metals in physiological conditions, a digestion with a simulated sweat solution was performed. In this case, the analysis of the same face-powder samples provided results below the limit of quantification, suggesting low bioaccessibility of the considered trace elements. © 2014 Taylor & Francis Group, LLC.


Risso F.,Regional Agency for Environmental Protection Liguria ARPAL | Magherini A.,Regional Agency for Environmental Protection Liguria ARPAL | Ottonelli M.,University of Genoa | Magi E.,University of Genoa | And 4 more authors.
Environmental Science and Pollution Research | Year: 2016

Worldwide polychlorinated biphenyls (PCBs) pollution is due to complex mixtures with high number of congeners, making the determination of total PCBs in the environment an open challenge. Because the bulk of PCBs production was made of Aroclor mixtures, this analysis is usually faced by the empirical mixture identification via visual inspection of the chromatogram. However, the identification reliability is questionable, as patterns in real samples are strongly affected by the frequent occurrence of more than one mixture. Our approach is based on the determination of a limited number of congeners chosen to enable objective criteria for Aroclor identification, summing up the advantages of congener-specific analysis with the ones of total PCBs determination. A quantitative relationship is established between congeners and any single mixture, or mixtures combination, leading to the identification of the actual contamination composition. The approach, due to its generality, allows the use of different sets of congeners and any technical mixture, including the non-Aroclor ones. The results confirm that PCB environmental pollution in northern Italy is based on Aroclor. Our methodology represents an important tool to understand the source and fate of the PCBs contamination. © 2016 Springer-Verlag Berlin Heidelberg


Narizzano R.,Regional Agency for Environmental Protection Liguria ARPAL | Risso F.,Regional Agency for Environmental Protection Liguria ARPAL | Magherini A.,Regional Agency for Environmental Protection Liguria ARPAL | Magi E.,University of Genoa | And 4 more authors.
Analytical and Bioanalytical Chemistry | Year: 2013

In the context of the entire analytical process, pre-treatment of soil samples is often inadequately considered although the reliability of the results is definitely compromised if the sample is not properly prepared. In this paper, the effect of drying conditions in soil sample pre-treatment on the determination of polycyclic aromatic hydrocarbons (PAHs) has been studied. A systematic approach has been adopted by varying soil type, drying temperatures and solvent polarity to highlight the effect on the analyte recovery; the relationship between PAH molecular structure and their evaporation process from soils is discussed. Experimental data demonstrate that, concerning temperature-assisted drying procedures, PAHs are divided in two distinct groups: PAHs lighter than pyrene, which are seriously affected by drying temperature; and heavier PAHs that can be considered as non-volatile compounds. For studies involving the analysis of lighter PAHs in environmental samples, working on as-received samples is necessary. © 2012 Springer-Verlag.


PubMed | University of Genoa and Regional Agency for Environmental Protection Liguria ARPAL
Type: Journal Article | Journal: Environmental science and pollution research international | Year: 2016

Worldwide polychlorinated biphenyls (PCBs) pollution is due to complex mixtures with high number of congeners, making the determination of total PCBs in the environment an open challenge. Because the bulk of PCBs production was made of Aroclor mixtures, this analysis is usually faced by the empirical mixture identification via visual inspection of the chromatogram. However, the identification reliability is questionable, as patterns in real samples are strongly affected by the frequent occurrence of more than one mixture. Our approach is based on the determination of a limited number of congeners chosen to enable objective criteria for Aroclor identification, summing up the advantages of congener-specific analysis with the ones of total PCBs determination. A quantitative relationship is established between congeners and any single mixture, or mixtures combination, leading to the identification of the actual contamination composition. The approach, due to its generality, allows the use of different sets of congeners and any technical mixture, including the non-Aroclor ones. The results confirm that PCB environmental pollution in northern Italy is based on Aroclor. Our methodology represents an important tool to understand the source and fate of the PCBs contamination.


PubMed | Regional Agency for Environmental Protection Liguria ARPAL
Type: Evaluation Studies | Journal: Analytical and bioanalytical chemistry | Year: 2013

In the context of the entire analytical process, pre-treatment of soil samples is often inadequately considered although the reliability of the results is definitely compromised if the sample is not properly prepared. In this paper, the effect of drying conditions in soil sample pre-treatment on the determination of polycyclic aromatic hydrocarbons (PAHs) has been studied. A systematic approach has been adopted by varying soil type, drying temperatures and solvent polarity to highlight the effect on the analyte recovery; the relationship between PAH molecular structure and their evaporation process from soils is discussed. Experimental data demonstrate that, concerning temperature-assisted drying procedures, PAHs are divided in two distinct groups: PAHs lighter than pyrene, which are seriously affected by drying temperature; and heavier PAHs that can be considered as non-volatile compounds. For studies involving the analysis of lighter PAHs in environmental samples, working on as-received samples is necessary.

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