Mineral waters in Slovakia — Evaluation of chemical composition stability using both historical records and the most recent data

Bodiš, Dušan; Kordík, J.; Slaninka, I.; Malík, Peter; Liščák, Pavel; Panák, Daniel; Božíková, Jarmila; Marcin, Daniel

doi:10.1016/j.gexplo.2010.06.009

Cited by 12 publications

(1 citation statement)

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“…EuroGeoSurveys (The Geochemistry Group of the European Geological Surveys) managed a common European sampling campaign of bottled mineral and spring waters (analysis of 884 samples for N70 chemical parameters in one laboratory) whose results were published in 2010 in the Special Issue "Mineral Waters of Europe" of Journal of et al, 2010;Cicchella et al, 2010), Norway/Sweden/Finland/Iceland (Frengstad et al, 2010), Portugal (Lourenço et al, 2010), Serbia (Petrović et al, 2010), Slovakia (Dušan et al, 2010), and Slovenia (Brenčič and Vreča, 2010;.…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical study of spas groundwaters from southeast Brazil

Bonotto

2016

Journal of Geochemical Exploration

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This paper describes a hydrochemical study focusing spas groundwaters occurring at São Paulo and Minas Gerais states, Brazil, that are extensively used for drinking in public places, bottling and bathing purposes, among other. The water samples (75) for this study were taken from springs and pumped tubular wells drilled at different aquifer systems that are inserted in Paraná and Southeastern Shield hydrogeological provinces. The data acquisition for temperature, electrical conductivity (EC), pH, redox potential (Eh), dissolved gases (O 2 , CO 2 and H 2 S) and alkalinity was in situ performed for avoiding losses and modification due to transportation. The total dissolved solids (TDS) concentration was evaluated by gravimetry, the major cations and anions, iron and silica by colorimetry/atomic absorption spectrophotometry (AAS), and fluoride by potentiometry. The acquired database allowed establish the principal trends among the parameters analyzed after assuring its consistence from expected relationships found in hydrogeochemical surveys. The groundwaters are reducing (from pH and Eh data), there is a direct TDS-EC relationship, implying on a significant correlation between their ionic strength (IS) and EC. The major ions justifying such trends were sodium, (bi)carbonate, chloride, sulfate and phosphate that also correlated positively with the IS. The spas groundwaters were classified according to the guidelines of the Brazilian Code of Mineral Waters (BCMW) and EU directive for mineral waters. The major hydrochemical facies were also determined, as well the main sources influencing the groundwater composition and possible subsurface temperatures.

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Section: Introductionmentioning

confidence: 99%

Hydrogeochemical study of spas groundwaters from southeast Brazil

Bonotto

2016

Journal of Geochemical Exploration

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Luminescent Sensor for Carbonate Ion Based on Lanthanide(III) Complexes of 1,4,7,10-Tetraazacyclododecane-1,4,7-Triacetic Acid (DO3A)

et al. 2012

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Lanthanide(III) complexes of 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid (H(3)DO3A) are suggested as sensors for sensitive luminescence-based determination of a carbonate anion. Thermodynamic study of association of [Eu(H(2)O)(2)(DO3A)] with bidentate anionic ligands using luminescence spectroscopy reveals an affinity order CO(3)(2-) > oxalate(2-) > picolinate(-) > phthalate(2-) ≈ citrate(3-); presumably as a consequence of an increasing chelate ring size. The ternary [Eu(DO3A)(picolinate)](-) and [Tb(DO3A)(picolinate)](-) complexes show improved photophysical properties due to the antenna effect of the picolinate anion. High quenching effect of carbonate anion and, to a lesser extent also oxalate, enables construction of a linear calibration plot utilizing optimized experimental conditions (e.g. c(LnL) = 0.1 mM, c(picolinate) = 2-5 mM, pH = 7.4, λ(exc) = 286 nm, etc.) for carbonate determination in solution. Both sensors show a comparable sensitivity and the detection limit of about 0.4 mM. In order to improve the photophysical properties of Ln(III) sensor by shift of excitation wavelength about 40 nm to VIS range, the isoquinoline-3-carboxylic acid (IQCA) as antenna ligand was employed instead of picolinic acid. The analysis of commercial samples of European mineral waters was carried out and they were compared to the results obtained by capillary isotachophoresis to confirm there is no inherent (systematic) error to the present analysis. The Ln(III) sensor with IQCA is recommended since it has a better robustness than that with picolinate. The present analytical method is simple and rapid, and it is useful for sensitive determination of bicarbonate/carbonate concentration in water samples under aerobic conditions.

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