Gian Maria Beone | Università Cattolica del Sacro Cuore (Catholic University of the Sacred Heart) (original) (raw)

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Research paper thumbnail of Determination of hexavalent, trivalent and metallic chromium in welding fumes

Toxicological & Environmental Chemistry, 1994

A procedure for the quantitative determination of the different chemical compounds of chromium in... more A procedure for the quantitative determination of the different chemical compounds of chromium in welding fumes is presented. Cr(0), Cr(III) and Cr(VI), whose toxicological properties are very different, are the three oxidation states in which this element can be present in air.The speciation has been performed by a selective solubilization procedure of welding fume particulates, collected on proper filters. Cr(VI), Cr(III), and Cr(0) are selectively and separately determined; it is also possible to distinguish the water soluble Cr(III) from the insoluble. Chromium in the examined welding fumes is present in all the three oxidation states (hexavalent, trivalent and metallic). Among the Cr(III) compounds the largest fraction in the welding fumes is represented by the soluble species.The importance of the kind of filter chosen to sample the particulate is illustrated, as well the typical interferences that can be encountered either in the solubilization or in the analytical measurements. Reprodiicibility obtained analysing 12 samples of welding fumes collected in the same working conditions was good and the standard deviation was 5%.

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Research paper thumbnail of Relative sensitivity of different soil biological properties to zinc

Soil Biology & Biochemistry, 2011

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Research paper thumbnail of Erratum: Determination of rare earth elements in tomato plants by inductively coupled plasma mass spectrometry techniques

Rapid Communications in Mass Spectrometry, 2010

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Research paper thumbnail of Determination of heavy metals in soils and sediments by microwave-assisted digestion and inductively coupled plasma optical emission spectrometry analysis

Analytica Chimica Acta, 2000

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Research paper thumbnail of Comparison of different analytical procedures in the determination of trace elements in lichens

Chemosphere, 2002

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Research paper thumbnail of Characterization of mercury species in soils by HPLC–ICP-MS and measurement of fraction removed by diffusive gradient in thin films

Talanta, 2008

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Research paper thumbnail of The role of analytical methods for the determination of trace elements in environmental biomonitors

Microchemical Journal, 2002

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Research paper thumbnail of Determination of rare earth elements in tomato plants by inductively coupled plasma mass spectrometry techniques

Rapid Communications in Mass Spectrometry, 2009

In recent years identification of the geographical origin of food has grown more important as con... more In recent years identification of the geographical origin of food has grown more important as consumers have become interested in knowing the provenance of the food that they purchase and eat. Certification schemes and labels have thus been developed to protect consumers and genuine producers from the improper use of popular brand names or renowned geographical origins. As the tomato is one of the major components of what is considered to be the healthy Mediterranean diet, it is important to be able to determine the geographical origin of tomatoes and tomato-based products such as tomato sauce. The aim of this work is to develop an analytical method to determine rare earth elements (RRE) for the control of the geographic origin of tomatoes. The content of REE in tomato plant samples collected from an agricultural area in Piacenza, Italy, was determined, using four different digestion procedures with and without HF. Microwave dissolution with HNO3 + H2O2 proved to be the most suitable digestion procedure. Inductively coupled plasma quadrupole mass spectrometry (ICPQMS) and inductively coupled plasma sector field plasma mass spectrometry (ICPSFMS) instruments, both coupled with a desolvation system, were used to determine the REE in tomato plants in two different laboratories. A matched calibration curve method was used for the quantification of the analytes. The detection limits (MDLs) of the method ranged from 0.03 ng g−1 for Ho, Tm, and Lu to 2 ng g−1 for La and Ce. The precision, in terms of relative standard deviation on six replicates, was good, with values ranging, on average, from 6.0% for LREE (light rare earth elements) to 16.5% for HREE (heavy rare earth elements). These detection limits allowed the determination of the very low concentrations of REE present in tomato berries. For the concentrations of REE in tomato plants, the following trend was observed: roots > leaves > stems > berries. Copyright © 2009 John Wiley & Sons, Ltd.

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Research paper thumbnail of MONITORING DURING TIME OF RELAPSES OF AN INCINERATION PLANT

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Research paper thumbnail of Mercury distribution in the main compartments of the eutrophic Lake Candia (Northern Italy

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Research paper thumbnail of The trend from 1934 to 2001 of metal concentrations in bivalve shells (Unio pictorum) from two small lakes: Lake Levico and Lake Caldonazzo (Trento Province, Northern Italy

... Oscar RAVERA*, Pier Renato TRINCHERINI1), Gian Maria BEONE2) and Bruno MAIOLINI3) ... The sam... more ... Oscar RAVERA*, Pier Renato TRINCHERINI1), Gian Maria BEONE2) and Bruno MAIOLINI3) ... The same solution was analyzed for Be, V, Cr, Ni, As, Mo, Cd, Pb and Co by ICP-MS by PR Trincherini and co-workers (Joint Research Centre of European Commission, IES – Ispra ...

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Research paper thumbnail of The role of natural purified humic acids in modifying mercury accessibility in water and soil

Journal of Environmental Quality, 2009

Contamination of soils with mercury can be a serious problem. It can be mobilized or stabilized b... more Contamination of soils with mercury can be a serious problem. It can be mobilized or stabilized by humic substances (HS) containing binding sites with reduced sulfur that can have different binding capacities for CH(3)Hg(+) and for Hg(2+). In this work we investigated the influence of different humic acids (HAs, extracted from lignite, compost, and forest soil) on mercury mobility and availability, both in a model solution and in soil samples from a mercury-polluted region. The technique of diffusive gradients in thin-films (DGT), which is capable of measuring: (i) free metal in solution; (ii) dissociated metal complexes previously mobilized by HA; (iii) mobilized metal-HA complexes that liberate metals by dissociation or by exchange reaction between the metal-HA complexes and the chelating groups on the resin-gel, was used in solutions and soils. The DGT measurements in solution, together with ultrafiltration, allowed estimation of the lability of Hg-HA complexes. Ultrafiltration results were also compared with predictions made by the windermere humic-aqueous model (WHAM). According to both these different approaches, Hg(2+) resulted nearly 100% complexed by HAs, whereas results from ultrafiltration showed that 32 to 72% of the CH(3)Hg(+) was bound to the HAs, with higher values for compost and lower values for forest and Aldrich HA. The DGT-measured mercury in soils was below 0.20 microg L(-1), irrespective of the extent of the contamination. Addition of HA increased the concentration of DGT-measured mercury in soil solution up to 100-fold in the contaminated soil and up to 30-fold in the control soil. The level of the increase also depended on the HA. The smallest increase (about 10 times) was found for lignite HA in both control and contaminated soils. The addition of forest HA gave the largest increases in DGT-measured mercury, in particular for the contaminated soil. Overall, the results demonstrated that DGT can be used for estimating the lability of mercury complexes in solution and for verifying enhanced mercury mobility when HA is added to contaminated soils.

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Research paper thumbnail of Seasonal variations in metal content of two Unio pictorum mancus (Mollusca, Unionidae) populations from two lakes of different trophic state

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Research paper thumbnail of Metal concentrations in Unio pictorum mancus(Mollusca Lamellibranchia) from of 12 Northern Italian lakes in relation to their trophic level

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Research paper thumbnail of Vantaggi e limiti del monitoraggio ambientale mediante l'analisi chimica dei Lamelli- branchi

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Research paper thumbnail of Comparison between the mercury contamination in populations of Unio pictorum mancus (Mollusca, Bivalvia) from two lakes of different trophic state: the oligo-mesotrophic Lake Maggiore and the eutrophic Lake Candia

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Research paper thumbnail of Levels of PCDD/Fs and trace elements in superficial soils of Pavia Province (Italy

Environment International, 2008

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Research paper thumbnail of Trace element concentrations in freshwater mussels and macrophytes as related to those in their environment

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Research paper thumbnail of Determination of hexavalent, trivalent and metallic chromium in welding fumes

Toxicological & Environmental Chemistry, 1994

A procedure for the quantitative determination of the different chemical compounds of chromium in... more A procedure for the quantitative determination of the different chemical compounds of chromium in welding fumes is presented. Cr(0), Cr(III) and Cr(VI), whose toxicological properties are very different, are the three oxidation states in which this element can be present in air.The speciation has been performed by a selective solubilization procedure of welding fume particulates, collected on proper filters. Cr(VI), Cr(III), and Cr(0) are selectively and separately determined; it is also possible to distinguish the water soluble Cr(III) from the insoluble. Chromium in the examined welding fumes is present in all the three oxidation states (hexavalent, trivalent and metallic). Among the Cr(III) compounds the largest fraction in the welding fumes is represented by the soluble species.The importance of the kind of filter chosen to sample the particulate is illustrated, as well the typical interferences that can be encountered either in the solubilization or in the analytical measurements. Reprodiicibility obtained analysing 12 samples of welding fumes collected in the same working conditions was good and the standard deviation was 5%.

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Research paper thumbnail of Relative sensitivity of different soil biological properties to zinc

Soil Biology & Biochemistry, 2011

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Research paper thumbnail of Erratum: Determination of rare earth elements in tomato plants by inductively coupled plasma mass spectrometry techniques

Rapid Communications in Mass Spectrometry, 2010

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Research paper thumbnail of Determination of heavy metals in soils and sediments by microwave-assisted digestion and inductively coupled plasma optical emission spectrometry analysis

Analytica Chimica Acta, 2000

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Research paper thumbnail of Comparison of different analytical procedures in the determination of trace elements in lichens

Chemosphere, 2002

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Research paper thumbnail of Characterization of mercury species in soils by HPLC–ICP-MS and measurement of fraction removed by diffusive gradient in thin films

Talanta, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The role of analytical methods for the determination of trace elements in environmental biomonitors

Microchemical Journal, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Determination of rare earth elements in tomato plants by inductively coupled plasma mass spectrometry techniques

Rapid Communications in Mass Spectrometry, 2009

In recent years identification of the geographical origin of food has grown more important as con... more In recent years identification of the geographical origin of food has grown more important as consumers have become interested in knowing the provenance of the food that they purchase and eat. Certification schemes and labels have thus been developed to protect consumers and genuine producers from the improper use of popular brand names or renowned geographical origins. As the tomato is one of the major components of what is considered to be the healthy Mediterranean diet, it is important to be able to determine the geographical origin of tomatoes and tomato-based products such as tomato sauce. The aim of this work is to develop an analytical method to determine rare earth elements (RRE) for the control of the geographic origin of tomatoes. The content of REE in tomato plant samples collected from an agricultural area in Piacenza, Italy, was determined, using four different digestion procedures with and without HF. Microwave dissolution with HNO3 + H2O2 proved to be the most suitable digestion procedure. Inductively coupled plasma quadrupole mass spectrometry (ICPQMS) and inductively coupled plasma sector field plasma mass spectrometry (ICPSFMS) instruments, both coupled with a desolvation system, were used to determine the REE in tomato plants in two different laboratories. A matched calibration curve method was used for the quantification of the analytes. The detection limits (MDLs) of the method ranged from 0.03 ng g−1 for Ho, Tm, and Lu to 2 ng g−1 for La and Ce. The precision, in terms of relative standard deviation on six replicates, was good, with values ranging, on average, from 6.0% for LREE (light rare earth elements) to 16.5% for HREE (heavy rare earth elements). These detection limits allowed the determination of the very low concentrations of REE present in tomato berries. For the concentrations of REE in tomato plants, the following trend was observed: roots > leaves > stems > berries. Copyright © 2009 John Wiley & Sons, Ltd.

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Research paper thumbnail of MONITORING DURING TIME OF RELAPSES OF AN INCINERATION PLANT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Mercury distribution in the main compartments of the eutrophic Lake Candia (Northern Italy

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The trend from 1934 to 2001 of metal concentrations in bivalve shells (Unio pictorum) from two small lakes: Lake Levico and Lake Caldonazzo (Trento Province, Northern Italy

... Oscar RAVERA*, Pier Renato TRINCHERINI1), Gian Maria BEONE2) and Bruno MAIOLINI3) ... The sam... more ... Oscar RAVERA*, Pier Renato TRINCHERINI1), Gian Maria BEONE2) and Bruno MAIOLINI3) ... The same solution was analyzed for Be, V, Cr, Ni, As, Mo, Cd, Pb and Co by ICP-MS by PR Trincherini and co-workers (Joint Research Centre of European Commission, IES – Ispra ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The role of natural purified humic acids in modifying mercury accessibility in water and soil

Journal of Environmental Quality, 2009

Contamination of soils with mercury can be a serious problem. It can be mobilized or stabilized b... more Contamination of soils with mercury can be a serious problem. It can be mobilized or stabilized by humic substances (HS) containing binding sites with reduced sulfur that can have different binding capacities for CH(3)Hg(+) and for Hg(2+). In this work we investigated the influence of different humic acids (HAs, extracted from lignite, compost, and forest soil) on mercury mobility and availability, both in a model solution and in soil samples from a mercury-polluted region. The technique of diffusive gradients in thin-films (DGT), which is capable of measuring: (i) free metal in solution; (ii) dissociated metal complexes previously mobilized by HA; (iii) mobilized metal-HA complexes that liberate metals by dissociation or by exchange reaction between the metal-HA complexes and the chelating groups on the resin-gel, was used in solutions and soils. The DGT measurements in solution, together with ultrafiltration, allowed estimation of the lability of Hg-HA complexes. Ultrafiltration results were also compared with predictions made by the windermere humic-aqueous model (WHAM). According to both these different approaches, Hg(2+) resulted nearly 100% complexed by HAs, whereas results from ultrafiltration showed that 32 to 72% of the CH(3)Hg(+) was bound to the HAs, with higher values for compost and lower values for forest and Aldrich HA. The DGT-measured mercury in soils was below 0.20 microg L(-1), irrespective of the extent of the contamination. Addition of HA increased the concentration of DGT-measured mercury in soil solution up to 100-fold in the contaminated soil and up to 30-fold in the control soil. The level of the increase also depended on the HA. The smallest increase (about 10 times) was found for lignite HA in both control and contaminated soils. The addition of forest HA gave the largest increases in DGT-measured mercury, in particular for the contaminated soil. Overall, the results demonstrated that DGT can be used for estimating the lability of mercury complexes in solution and for verifying enhanced mercury mobility when HA is added to contaminated soils.

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Research paper thumbnail of Seasonal variations in metal content of two Unio pictorum mancus (Mollusca, Unionidae) populations from two lakes of different trophic state

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Metal concentrations in Unio pictorum mancus(Mollusca Lamellibranchia) from of 12 Northern Italian lakes in relation to their trophic level

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Vantaggi e limiti del monitoraggio ambientale mediante l'analisi chimica dei Lamelli- branchi

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Comparison between the mercury contamination in populations of Unio pictorum mancus (Mollusca, Bivalvia) from two lakes of different trophic state: the oligo-mesotrophic Lake Maggiore and the eutrophic Lake Candia

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Levels of PCDD/Fs and trace elements in superficial soils of Pavia Province (Italy

Environment International, 2008

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Research paper thumbnail of Trace element concentrations in freshwater mussels and macrophytes as related to those in their environment

Bookmarks Related papers MentionsView impact