Viorica Popescu - Academia.edu (original) (raw)
Papers by Viorica Popescu
Applied Sciences
Groundwater pollution is a very common problem worldwide, as it poses a serious threat to both th... more Groundwater pollution is a very common problem worldwide, as it poses a serious threat to both the environment and the economic and social development and consequently generates several types of costs. The analysis of pollution control involves a permanent comparison between pollution costs and the costs associated with various methods of pollution reduction. An environmental policy based on economic instruments is more effective than an environmental policy focused on command and control tools. In this respect, the present paper provides a case study showing how anthropogenic factors such as wastewater, industrial, agricultural, and natural factors are able to change the physical and chemical parameters of groundwater in the study area, thus endangering their quality. In order to monitor the groundwater quality in the region of Dobrudja, an analysis of physico-chemical parameters was performed. The content of heavy metals was analyzed and the health risk index was taken into accoun...
Environmental Engineering and Management Journal
Fluoride content in some available teas, dry leaves and tea infusions were determined, in order t... more Fluoride content in some available teas, dry leaves and tea infusions were determined, in order to check the influence of brewing time on fluoride content in tea and to compare the percent extraction of fluoride releasing during tea infusion time. A fluoride ion selective electrode was used to determinate the fluoride content in tea samples (Hypericum perforatum, Tilia cordata and Camellia sinensis). Total fluoride contents of tea leaves were determined to be 91.1-162 mg/kg d.w., and 0.095-1.450 mg/L in tea infusions and the percentage of fluoride infused for analysed tea leaves ranged from 7.2% to 89.5%. The study shows that there are differences between the fluoride percentage in the tea infusions and about 85% of fluoride in tea leaves was released into Hypericum perforatum and Camellia sinensis, after 30 min of brewing. Tilia cordata shows a slow growth during the infusion process, having the lowest percentage of fluoride.
Environmental Engineering and Management Journal
The objective of this work was to assess the contents of selected organic pollutants (polycyclic ... more The objective of this work was to assess the contents of selected organic pollutants (polycyclic aromatic hydrocarbons-PAHs and organochlorine pesticides-POPs) in the surface waters of Danube Delta and Plitvice Lakes. These organic pollutants are among the most prevalent pollutants, being detected in almost all environmental compartments. The analyses of PAHs were performed by gas chromatography with mass spectrometer detector (GC-MS) and that of POPs by gas chromatography with electron capture detection (GC-ECD).
Environmental Engineering and Management Journal
Analyses of plants render important information in toxicological and environmental investigations... more Analyses of plants render important information in toxicological and environmental investigations since plants are a very significant link in the trophic chain. The aim of this study was to analyze quantitatively the distribution of heavy metals and ascorbic acid in Allium plants: Allium sativum L. (garlic) and Allium cepa L. (onion). Heavy metals accumulation in garlic and onion was quantified by flame atomic absorption spectrometry (FAAS) after the chemical mineralization of the samples with nitric acid and hydrogen peroxide in a Digesthal device. To determinate of vitamin C we used a titrimetric method with potassium brommat-bromide solution in acid medium, when vitamin C is oxidized to dehidroascorbic acid by bromine. Our results indicate a high concentration of vitamin C in leaves of the studied Allium plants.
Environmental Engineering and Management Journal
Some industry activities in the area of Constanta (Romania) contribute to the polluting of the en... more Some industry activities in the area of Constanta (Romania) contribute to the polluting of the environment with heavy metals. In order to estimate the pollution level and the danger created by this phenomenon, some analyses are required with regard to determining the concentration of the pollutant metals in plants samples. The investigated metals were determined by flame atomic absorbtion spectrometry in different types of vegetables and fruits, after the chemical mineralization of the sample with a Digesdahl device. These levels were compared with those from literature.
Environmental Engineering and Management Journal
The presence of pollutants in food raises some serious questions concerning their potential impac... more The presence of pollutants in food raises some serious questions concerning their potential impact on consumers health, being necessary to monitor their distribution in the environment. The present work provides data regarding levels of organochlorine pesticides (lindane, p,p'-DDT, p,p'-DDE, p,p'-DDD, HCB, aldrin, dieldrin, endrin and hepthaclor) and PAHs: acenaphthene (Ace), acenaphthylene (Acy), fluorene (F), naphthalene (Np), anthracene (An), fluoranthene (Fl), phenanthrene (Ph), benzo[α]anthracene (B[α]An), benzo[k]fluoranthene (B[k]Fl), chrysene (Chry), pyrene (Py), benzo[ghi]perylene (B[ghi]Pe), benzo[α]pyrene (B[α]Py), dibenzo[α,h]anthracene dB[α,h]An, indeno[1,2,3-cd]pyrene (I[1,2,3-cd]Py) in tomato (Solanum Lycopersicum) in different stages of growing. Samples of tomatoes were collected from rural (Slava Rusa) and urban (Constanta) areas from Romania, belonging to Dobrogea region. A Hewlett-Packard 5890 gas chromatograph (GC) equipped with an electron capture detector (ECD) and a HP-5 fused-silica capillary column was used for OCPs analysis, while for PAHs analysis, a Hewlett-Packard 5890 gas chromatograph (GC) equipped with a Hewlett-Packard 5972 mass spectrometer (MS) was used. DDD, DDE and DDT concentrations were under detection limits and all OCPs concentrations recorded for studied samples were under the maximum limits imposed by European Commission. A very wide range of PAH concentration was observed in studied samples. In tomato fruit from urban area the highest concentration was found for antracen (0.671 µg/kg). Benzo[α]pyrene concentration is a good marker of carcinogenic PAH levels in environmental samples and the maximum limit established by the Council Directive was 0.03 µg/kg for foodstuffs. Some levels of BaP for studied samples were over the maximum limit.
Environmental Engineering and Management Journal
The aim of this work was to study the content of Fe, Mn, Zn and Pb in the mixtures which contain ... more The aim of this work was to study the content of Fe, Mn, Zn and Pb in the mixtures which contain volatile oil between other components, obtained after the Soxhlet extraction or maceration of the samples (different organs of garden flowers-blue hyacinth and chrysanthemum). The blue hyacinth is a bulbous perennial herb in the Lilliaceae family, grown for its showy and fragrant springtime flower display. Garden chrysanthemums are tender perennials in the Asteraceae family in double-flowered forms. Flame atomic absorption spectrometry (FAAS) was used for the quantitative determination of metals in this matrix. Also, the refraction indexes and conductivity were measured using Abbe refractometer and LF 340-A conductometer, for the characterization of the obtained mixtures, respectively for correlation with the mineral content. It was observed that that iron concentrations are higher in blue hyacinth extract and macerates than chrysanthemum.
Revista de Chimie -Bucharest- Original Edition-
Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C t... more Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C tablet are proposed: conductometry and titrimetric method with potassium bromat-bromide solution in the acid medium. The procedures have been applied to the analysis of locally commercial Vitamin C tablet samples. The variations of Vitamin C concentration were studied in formation of temperature. For the kinetic study was determinate the rate constant, the half-time and the activation energy for vitamin C.
European Journal of Lipid Science and Technology, 2005
Page 1. Sabrina Moret Giorgia Purcaro Lanfranco S. Conte ... Correspondence: Sabrina Moret, Dipar... more Page 1. Sabrina Moret Giorgia Purcaro Lanfranco S. Conte ... Correspondence: Sabrina Moret, Dipartimento di Scienze degli Alimenti, Università di Udine, Via Marangoni 97, 33100 Udine, Italy. Phone 139 0432 590725, Fax: 139 0432 590719, e-mail: sabrina.moret@uniud.it ...
Environmental Monitoring and Assessment, 2010
In this study, 24 organochlorine pesticide residues in 109 different honey samples collected from... more In this study, 24 organochlorine pesticide residues in 109 different honey samples collected from stores and open markets in Konya, Turkey were analyzed by gas chromatographyelectron capture detection. Aldrin, cis-chlordane, trans-chlordane, oxy-chlordane, 2,4-DDE, and 4,4-DDE were found in all honey samples. The mean value was 0.0540 μg g −1 for oxy-chlordane. In the 55 samples of 109, levels of organochlorine pesticide residues of oxy-chlordane were determined as higher than those of Turkish Alimentarius Codex maximum residual limits (MRLs). Other organochlorine pesticide residues also exceeded MRLs except for cis-heptachlor epoxide and α-hexachlorocyclohexane. Since all of the honey samples are found contaminated and most of these samples exceeded MRLs, a control
The aim of this work is to determine the metal contents from different components of a fruit (pul... more The aim of this work is to determine the metal contents from different components of a fruit (pulp, film and peel). The determinations of metal's traces are very important because they are involved in biological cycles and indicate high toxicity. Analyses were performed using the flame atomic absorption spectrometry (Shimadzu AA 6200), after the chemical mineralization of the sample with a Digesdahl device. The obtained values are in good agreement with the literature data.
Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C t... more Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C tablet are proposed: conductometry and titrimetric method with potassium bromat-bromide solution in the acid medium. The procedures have been applied to the analysis of locally commercial Vitamin C tablet samples. The variations of Vitamin C concentration were studied in formation of temperature. For the kinetic study was determinate the rate constant, the half-time and the activation energy for vitamin C.
Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C t... more Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C tablet are proposed: conductometry and titrimetric method with potassium bromat-bromide solution in the acid medium. The procedures have been applied to the analysis of locally commercial Vitamin C tablet samples. The variations of Vitamin C concentration were studied in formation of temperature. For the kinetic study was determinate the rate constant, the half-time and the activation energy for vitamin C.
Journal of Dairy Research, 2016
This Research Communication reports analysis of 37 compounds comprising polycyclic aromatic hydro... more This Research Communication reports analysis of 37 compounds comprising polycyclic aromatic hydrocarbons (PAHs), organochlorine and organophosphate pesticides (OCPS and OPPS) in milk powder (one brand each of commercial infant formulae, follow-on formulae and baby formulae purchased from a local supermarket in Romania). The selected analytes were investigated using gas chromatography-mass spectrometry (GC-MS), gas chromatography with electron capture detector (GC-ECD) and gas chromatography with thermionic sensitive detection (GC-TSD). The estimated limits of detection for most target analytes were in the μg/kg level (range 0·001-0·320 µg/kg). The purpose of the study was to determine the selected analytes, to assess the exposure of babies and infants and to produce data for comparison with tolerable limits according to the European Union Regulations. In most of the samples the organochlorine pesticides values were under the limit of detection. Exceptions were heptachlor epoxide and endosulfan sulphate, the last of which was found in all analysed samples at low concentrations. We also found detectable levels of ethoprophos, parathion-methyl, chlorpyrifos, prothiofos, guthion, disulfoton and fenchlorphos in most of the analysed samples. Benzo[a]pyrene, which is used as an indicator for the presence of PAHs, was not detected in selected samples. The low level of exposure to contaminants indicates that there are no health risks for the infants and babies that consume this brand of milk powder formulae.
SSRN Electronic Journal, 2000
Journal of Thermal Analysis and Calorimetry
In order to evidence the ligand influence on the thermal stability for Co(II) complex combination... more In order to evidence the ligand influence on the thermal stability for Co(II) complex combinations, we have synthesized five complex combinations of this metal with Schiff bases obtained by condensation of ethylenediamine with acetylacetone and benzoylacetone; phenylenediamine with benzoylacetone and also anthranilic acid with benzaldehyde.
Revista de Chimie -Bucharest- Original Edition-
Revista de Chimie -Bucharest- Original Edition-
The properties of precipitation are mainly determined by solid, liquid and gaseous substances tha... more The properties of precipitation are mainly determined by solid, liquid and gaseous substances that exist in suspended or dissolved form. These substances come from many complex interactions between the atmosphere – hydrosphere – lithosphere – biota. The analytical characterization of precipitation has been based on the analysis of several chemical parameters: pH, conductivity, chloride, fluoride and ammonium ions, total hardness, alkalinity, H2S and sulphides, COD (Mn), nitrites, phosphorous, metallic ions (total iron, copper and chromium). In this purpose were collected rainwater, ice and snow from different areas (cities Năvodari, Constanţa, Buzău and Mihail Kogălniceanu) during November 2007 till February 2008. This study shows that chemical characteristics of the analyzed water samples vary from one region to another depending on the mineralogical composition of zones crossed, the contact time, temperature, weather conditions, the sampling period (day or night) and the nature of...
Applied Sciences
Groundwater pollution is a very common problem worldwide, as it poses a serious threat to both th... more Groundwater pollution is a very common problem worldwide, as it poses a serious threat to both the environment and the economic and social development and consequently generates several types of costs. The analysis of pollution control involves a permanent comparison between pollution costs and the costs associated with various methods of pollution reduction. An environmental policy based on economic instruments is more effective than an environmental policy focused on command and control tools. In this respect, the present paper provides a case study showing how anthropogenic factors such as wastewater, industrial, agricultural, and natural factors are able to change the physical and chemical parameters of groundwater in the study area, thus endangering their quality. In order to monitor the groundwater quality in the region of Dobrudja, an analysis of physico-chemical parameters was performed. The content of heavy metals was analyzed and the health risk index was taken into accoun...
Environmental Engineering and Management Journal
Fluoride content in some available teas, dry leaves and tea infusions were determined, in order t... more Fluoride content in some available teas, dry leaves and tea infusions were determined, in order to check the influence of brewing time on fluoride content in tea and to compare the percent extraction of fluoride releasing during tea infusion time. A fluoride ion selective electrode was used to determinate the fluoride content in tea samples (Hypericum perforatum, Tilia cordata and Camellia sinensis). Total fluoride contents of tea leaves were determined to be 91.1-162 mg/kg d.w., and 0.095-1.450 mg/L in tea infusions and the percentage of fluoride infused for analysed tea leaves ranged from 7.2% to 89.5%. The study shows that there are differences between the fluoride percentage in the tea infusions and about 85% of fluoride in tea leaves was released into Hypericum perforatum and Camellia sinensis, after 30 min of brewing. Tilia cordata shows a slow growth during the infusion process, having the lowest percentage of fluoride.
Environmental Engineering and Management Journal
The objective of this work was to assess the contents of selected organic pollutants (polycyclic ... more The objective of this work was to assess the contents of selected organic pollutants (polycyclic aromatic hydrocarbons-PAHs and organochlorine pesticides-POPs) in the surface waters of Danube Delta and Plitvice Lakes. These organic pollutants are among the most prevalent pollutants, being detected in almost all environmental compartments. The analyses of PAHs were performed by gas chromatography with mass spectrometer detector (GC-MS) and that of POPs by gas chromatography with electron capture detection (GC-ECD).
Environmental Engineering and Management Journal
Analyses of plants render important information in toxicological and environmental investigations... more Analyses of plants render important information in toxicological and environmental investigations since plants are a very significant link in the trophic chain. The aim of this study was to analyze quantitatively the distribution of heavy metals and ascorbic acid in Allium plants: Allium sativum L. (garlic) and Allium cepa L. (onion). Heavy metals accumulation in garlic and onion was quantified by flame atomic absorption spectrometry (FAAS) after the chemical mineralization of the samples with nitric acid and hydrogen peroxide in a Digesthal device. To determinate of vitamin C we used a titrimetric method with potassium brommat-bromide solution in acid medium, when vitamin C is oxidized to dehidroascorbic acid by bromine. Our results indicate a high concentration of vitamin C in leaves of the studied Allium plants.
Environmental Engineering and Management Journal
Some industry activities in the area of Constanta (Romania) contribute to the polluting of the en... more Some industry activities in the area of Constanta (Romania) contribute to the polluting of the environment with heavy metals. In order to estimate the pollution level and the danger created by this phenomenon, some analyses are required with regard to determining the concentration of the pollutant metals in plants samples. The investigated metals were determined by flame atomic absorbtion spectrometry in different types of vegetables and fruits, after the chemical mineralization of the sample with a Digesdahl device. These levels were compared with those from literature.
Environmental Engineering and Management Journal
The presence of pollutants in food raises some serious questions concerning their potential impac... more The presence of pollutants in food raises some serious questions concerning their potential impact on consumers health, being necessary to monitor their distribution in the environment. The present work provides data regarding levels of organochlorine pesticides (lindane, p,p'-DDT, p,p'-DDE, p,p'-DDD, HCB, aldrin, dieldrin, endrin and hepthaclor) and PAHs: acenaphthene (Ace), acenaphthylene (Acy), fluorene (F), naphthalene (Np), anthracene (An), fluoranthene (Fl), phenanthrene (Ph), benzo[α]anthracene (B[α]An), benzo[k]fluoranthene (B[k]Fl), chrysene (Chry), pyrene (Py), benzo[ghi]perylene (B[ghi]Pe), benzo[α]pyrene (B[α]Py), dibenzo[α,h]anthracene dB[α,h]An, indeno[1,2,3-cd]pyrene (I[1,2,3-cd]Py) in tomato (Solanum Lycopersicum) in different stages of growing. Samples of tomatoes were collected from rural (Slava Rusa) and urban (Constanta) areas from Romania, belonging to Dobrogea region. A Hewlett-Packard 5890 gas chromatograph (GC) equipped with an electron capture detector (ECD) and a HP-5 fused-silica capillary column was used for OCPs analysis, while for PAHs analysis, a Hewlett-Packard 5890 gas chromatograph (GC) equipped with a Hewlett-Packard 5972 mass spectrometer (MS) was used. DDD, DDE and DDT concentrations were under detection limits and all OCPs concentrations recorded for studied samples were under the maximum limits imposed by European Commission. A very wide range of PAH concentration was observed in studied samples. In tomato fruit from urban area the highest concentration was found for antracen (0.671 µg/kg). Benzo[α]pyrene concentration is a good marker of carcinogenic PAH levels in environmental samples and the maximum limit established by the Council Directive was 0.03 µg/kg for foodstuffs. Some levels of BaP for studied samples were over the maximum limit.
Environmental Engineering and Management Journal
The aim of this work was to study the content of Fe, Mn, Zn and Pb in the mixtures which contain ... more The aim of this work was to study the content of Fe, Mn, Zn and Pb in the mixtures which contain volatile oil between other components, obtained after the Soxhlet extraction or maceration of the samples (different organs of garden flowers-blue hyacinth and chrysanthemum). The blue hyacinth is a bulbous perennial herb in the Lilliaceae family, grown for its showy and fragrant springtime flower display. Garden chrysanthemums are tender perennials in the Asteraceae family in double-flowered forms. Flame atomic absorption spectrometry (FAAS) was used for the quantitative determination of metals in this matrix. Also, the refraction indexes and conductivity were measured using Abbe refractometer and LF 340-A conductometer, for the characterization of the obtained mixtures, respectively for correlation with the mineral content. It was observed that that iron concentrations are higher in blue hyacinth extract and macerates than chrysanthemum.
Revista de Chimie -Bucharest- Original Edition-
Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C t... more Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C tablet are proposed: conductometry and titrimetric method with potassium bromat-bromide solution in the acid medium. The procedures have been applied to the analysis of locally commercial Vitamin C tablet samples. The variations of Vitamin C concentration were studied in formation of temperature. For the kinetic study was determinate the rate constant, the half-time and the activation energy for vitamin C.
European Journal of Lipid Science and Technology, 2005
Page 1. Sabrina Moret Giorgia Purcaro Lanfranco S. Conte ... Correspondence: Sabrina Moret, Dipar... more Page 1. Sabrina Moret Giorgia Purcaro Lanfranco S. Conte ... Correspondence: Sabrina Moret, Dipartimento di Scienze degli Alimenti, Università di Udine, Via Marangoni 97, 33100 Udine, Italy. Phone 139 0432 590725, Fax: 139 0432 590719, e-mail: sabrina.moret@uniud.it ...
Environmental Monitoring and Assessment, 2010
In this study, 24 organochlorine pesticide residues in 109 different honey samples collected from... more In this study, 24 organochlorine pesticide residues in 109 different honey samples collected from stores and open markets in Konya, Turkey were analyzed by gas chromatographyelectron capture detection. Aldrin, cis-chlordane, trans-chlordane, oxy-chlordane, 2,4-DDE, and 4,4-DDE were found in all honey samples. The mean value was 0.0540 μg g −1 for oxy-chlordane. In the 55 samples of 109, levels of organochlorine pesticide residues of oxy-chlordane were determined as higher than those of Turkish Alimentarius Codex maximum residual limits (MRLs). Other organochlorine pesticide residues also exceeded MRLs except for cis-heptachlor epoxide and α-hexachlorocyclohexane. Since all of the honey samples are found contaminated and most of these samples exceeded MRLs, a control
The aim of this work is to determine the metal contents from different components of a fruit (pul... more The aim of this work is to determine the metal contents from different components of a fruit (pulp, film and peel). The determinations of metal's traces are very important because they are involved in biological cycles and indicate high toxicity. Analyses were performed using the flame atomic absorption spectrometry (Shimadzu AA 6200), after the chemical mineralization of the sample with a Digesdahl device. The obtained values are in good agreement with the literature data.
Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C t... more Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C tablet are proposed: conductometry and titrimetric method with potassium bromat-bromide solution in the acid medium. The procedures have been applied to the analysis of locally commercial Vitamin C tablet samples. The variations of Vitamin C concentration were studied in formation of temperature. For the kinetic study was determinate the rate constant, the half-time and the activation energy for vitamin C.
Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C t... more Two simple procedures for the determination of ascorbic acid (Vitamin C) content in a Vitamin C tablet are proposed: conductometry and titrimetric method with potassium bromat-bromide solution in the acid medium. The procedures have been applied to the analysis of locally commercial Vitamin C tablet samples. The variations of Vitamin C concentration were studied in formation of temperature. For the kinetic study was determinate the rate constant, the half-time and the activation energy for vitamin C.
Journal of Dairy Research, 2016
This Research Communication reports analysis of 37 compounds comprising polycyclic aromatic hydro... more This Research Communication reports analysis of 37 compounds comprising polycyclic aromatic hydrocarbons (PAHs), organochlorine and organophosphate pesticides (OCPS and OPPS) in milk powder (one brand each of commercial infant formulae, follow-on formulae and baby formulae purchased from a local supermarket in Romania). The selected analytes were investigated using gas chromatography-mass spectrometry (GC-MS), gas chromatography with electron capture detector (GC-ECD) and gas chromatography with thermionic sensitive detection (GC-TSD). The estimated limits of detection for most target analytes were in the μg/kg level (range 0·001-0·320 µg/kg). The purpose of the study was to determine the selected analytes, to assess the exposure of babies and infants and to produce data for comparison with tolerable limits according to the European Union Regulations. In most of the samples the organochlorine pesticides values were under the limit of detection. Exceptions were heptachlor epoxide and endosulfan sulphate, the last of which was found in all analysed samples at low concentrations. We also found detectable levels of ethoprophos, parathion-methyl, chlorpyrifos, prothiofos, guthion, disulfoton and fenchlorphos in most of the analysed samples. Benzo[a]pyrene, which is used as an indicator for the presence of PAHs, was not detected in selected samples. The low level of exposure to contaminants indicates that there are no health risks for the infants and babies that consume this brand of milk powder formulae.
SSRN Electronic Journal, 2000
Journal of Thermal Analysis and Calorimetry
In order to evidence the ligand influence on the thermal stability for Co(II) complex combination... more In order to evidence the ligand influence on the thermal stability for Co(II) complex combinations, we have synthesized five complex combinations of this metal with Schiff bases obtained by condensation of ethylenediamine with acetylacetone and benzoylacetone; phenylenediamine with benzoylacetone and also anthranilic acid with benzaldehyde.
Revista de Chimie -Bucharest- Original Edition-
Revista de Chimie -Bucharest- Original Edition-
The properties of precipitation are mainly determined by solid, liquid and gaseous substances tha... more The properties of precipitation are mainly determined by solid, liquid and gaseous substances that exist in suspended or dissolved form. These substances come from many complex interactions between the atmosphere – hydrosphere – lithosphere – biota. The analytical characterization of precipitation has been based on the analysis of several chemical parameters: pH, conductivity, chloride, fluoride and ammonium ions, total hardness, alkalinity, H2S and sulphides, COD (Mn), nitrites, phosphorous, metallic ions (total iron, copper and chromium). In this purpose were collected rainwater, ice and snow from different areas (cities Năvodari, Constanţa, Buzău and Mihail Kogălniceanu) during November 2007 till February 2008. This study shows that chemical characteristics of the analyzed water samples vary from one region to another depending on the mineralogical composition of zones crossed, the contact time, temperature, weather conditions, the sampling period (day or night) and the nature of...