17 research outputs found
Native Fluorescent Natural Deep Eutectic Solvents for Green Sensing Applications: Curcuminoids in Curcuma longa Powder
Natural deep eutectic solvents are a trending topic in Green Chemistry. These solvents present high solubilization capacity, reusability, tunable properties, simple preparation, biodegradability, safety, high availability, and low cost, making them excellent candidates for analytical applications. In this work, a new family of fluorescent eutectic systems is described, with the fluorescence property being unknown and unused so far. For this purpose, a novel preparation method using an ultrasound probe was employed, by means of an innovative single-step procedure, that included the preparation of FCH (fructose, citric acid, and water, 1:1:5 molar ratio) and the extraction/determination of curcuminoids from Curcuma longa powder. This methodology was successfully carried out by employing a portable and inexpensive 3D-printed fluorometer and a smartphone. In this way, extraction efficiencies between 90 and 106%, relative to the NIST reference method, were obtained in just 3.40 min. Besides, the greenness of the new methodology was evaluated by employing the AGREE metric, showing that the developed approach is >2.5 times greener than previously published works for curcuminoid determination. This groundbreaking procedure is robust, versatile, and simple to implement, does not require sophisticated apparatus or instruments in the detection step, and, mainly, agrees with Green Analytical Chemistry (GAC) principles.Fil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Mendoza. Instituto de BiologĂa AgrĂcola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de BiologĂa AgrĂcola de Mendoza; ArgentinaFil: Vidal, Ezequiel Martin. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Silva, MarĂa Fernanda. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Mendoza. Instituto de BiologĂa AgrĂcola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de BiologĂa AgrĂcola de Mendoza; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Gomez, Federico Jose Vicente. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Mendoza. Instituto de BiologĂa AgrĂcola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de BiologĂa AgrĂcola de Mendoza; Argentin
Electrochemically reduced graphene oxide-based screen-printed electrodes for total tetracycline determination by adsorptive transfer stripping differential pulse voltammetry
Disposable electrochemically reduced graphene oxide-based (ERGO) screen-printed electrodes (SPE) were developed for the determination of total tetracyclines as a sample screening approach. To this end, a selective adsorption-detection approach relied on adsorptive transfer stripping differential pulse voltammetry (AdTDPV) was devised, where the high adsorption capacity and the electrochemical properties of ERGO were simultaneously exploited. The approach was very simple, fast (6 min.), highly selective by combining the adsorptive and the electrochemical features of tetracyclines, and it used just 10 ÎŒL of the sample. The electrochemical sensor applicability was demonstrated in the analysis of environmental and food samples. The not-fully explored AdTDPV analytical possibilities on disposable nanostructured transducers become a new tool in food and environmental fields; drawing new horizons for âin-situâ analysis.Fil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentina. Universidad de AlcalĂĄ; EspañaFil: Sierra, Tania. Universidad de AlcalĂĄ; EspañaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lista, Adriana Guillermina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Crevillen, Agustin G.. Universidad Nacional de EducaciĂłn a Distancia; EspañaFil: Escarpa Miguel, JesĂșs Alberto. Universidad de AlcalĂĄ; España. Instituto de Investigaciones QuĂmicas âAndrĂ©s M. del RĂoâ; Españ
A simple and new reverse liquid-liquid microextraction for the automated spectrometric determination of doxycycline in chicken fat
This work presents a new, simple and inexpensive reverse liquid-liquid microextraction of doxycycline (DOC) from chicken fat. In this just 13 min extraction methodology, acidulated water, as extraction solvent (400 ”L), was used. A monochannel flow injection system was designed for the spectrometric determination of the analyte (Ê = 344 nm). The extracted solution containing DOC was loaded into the injection valve of the continuous flow manifold. A lineal range between 100 and 700 ”g DOC kgâ1 sample was obtained. The LOD and LOQ were 33 ”g kgâ1 and 100 ”g kgâ1 respectively. The relative standard deviation was 4.87% and the sample throughput for the entire process was 4.5 hâ1. As recovery values when the method was applied to real samples showed variability, the expanded uncertainties were calculated. Their values indicated that the new method is independent of the concentration of the analyte and the origin of the sample.Fil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lista, Adriana Guillermina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin
Reverse ultrasound-assisted emulsification-microextraction of macrolides from chicken fat followed by electrophoretic determination
A new microextraction methodology, called reverse ultrasound-assisted emulsification-microextraction (R-USAEME) was developed to extract Tilmicosin (TILM) and Tylosin (TYL) from chicken fat samples, prior to their determination by capillary electrophoresis with UV-detection. The R-USAEME was based on the use of an aqueous ionic liquid ([Bmim]Cl) solution with sodium tartrate and sodium phosphate as extractant, applying an ultrasound probe (91 W; 7.5 min). A good linearity was obtained in a range from 35 to 200 ÎŒg kgâ1 with relative standard deviations (RSDs) lower than 13% using matrix-matched calibration on five chicken fat samples. The quantification limits (LOQs), ranged from 17.4 to 55.0 ÎŒg kgâ1 and from 22.1 to 47.0 ÎŒg kgâ1 for TILM and TYL respectively. The obtained recoveries were between 73 and 117%. The analytical parameters clearly showed the applicability of the method for the extraction and quantification of macrolides in this complex biological sample.Fil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lista, Adriana Guillermina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin
Use of universal 3D-Printed smartphone spectrophotometer to develop a time-based analysis for hypochlorite
A fully-functional smartphone-based spectrophotometer was designed and built using 3D printing. The major advantage of this approach is its capacity to be interfaced with a variety of smartphones, allowing the use of the smartphone's camera and display, and regardless of the relative position of the camera. The analytical performance of the device was analyzed using a model dye (crystal violet), leading to a proportional response for concentrations in the 0.06â15.0 mg Lâ1 range, with a variability of 1.0% (intra-day) and 2.6% (inter-day). To demonstrate the functionality of the device, the degradation process of the dye by sodium hypochlorite was studied. The results obtained were applied to develop a paper-based test for NaClO in sanitation solutions, in which the time required to bleach the dye was used to estimate the concentration of the solution. This device represents a simple and inexpensive tool for everyday laboratory use and could address important analytical challenges in low-income communities and features a versatile arrangement, that is compatible with a wide variety of smartphones and software platforms.Fil: Vidal, Ezequiel Martin. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Garcia, Carlos D.. Clemson University; Estados UnidosFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin
Micropaper-based analytical device (ÎŒPAD) for the simultaneous determination of nitrite and fluoride using a smartphone
The design, optimization and evaluation of a micro paper-based analytical device (ÎŒPAD) for the simultaneous determination of fluoride and nitrite in real water samples was developed. In order to create hydrophilic and hydrophobic zones on the laboratory filter paper device, a wax ink printer was used. The ÎŒPAD has four reaction zones for each analyte where the respective colorimetric reactions took place using the SPADNS method and Griess method for fluoride and nitrite respectively. A Smartphone was used to capture the corresponding images which were then converted to the RGB colour space by the software ImageJ using a personal computer. Under the optimal conditions, the linear range was 0.23â2.26âŻmgâŻLâ1 for fluoride with limit of detection (LOD) and limit of quantification (LOQ) of 0.13âŻmgâŻLâ1 and 0.25âŻmgâŻLâ1. The working range for nitrite was 0.05â10.0âŻmgâŻLâ1 with LOD of 0.03âŻmgâŻLâ1 and LOQ 0.13âŻmgâŻLâ1. The ÎŒPAD was used to determine the analytes in water samples obtaining satisfactory results in both cases. The validation of fluoride determination was performed comparing the ÎŒPAD with the reference method and for nitrite determination, a recovery study was carried out. In both cases, the obtained results demonstrated a good agreement.Fil: Vidal, Ezequiel Martin. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lista, Adriana Guillermina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin
New, inexpensive and simple 3D printable device for nephelometric and fluorimetric determination based on smartphone sensing
A new, inexpensive and easy to use 3D printable device was developed for nephelometric and fluorimetric determination. Its applicability was tested for the quantification of quinine in tonic drinks and sulfate in natural water with good analytical accuracy. In this way, sulfate determination was carried out by nephelometry using a red LED, while quinine was determined using a blue LED by fluorimetry. A smartphone camera was used to take the pictures and afterwards transform them into the RGB color space using the software ImageJ by a personal computer. The linear range was 2.0-50.0 mg L-1for sulfate with a LOD of 0.13 mg L-1, and the corresponding quantification limit (LOQ) was 0.43 mg L-1. The linear range for quinine was from 0.42 to 3.10 mg L-1. The LOD and LOQ were 0.11 mg L-1and 0.38 mg L-1, respectively.Fil: Vidal, Ezequiel Martin. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Mendoza. Instituto de BiologĂa AgrĂcola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de BiologĂa AgrĂcola de Mendoza; ArgentinaFil: Aguirre, Miguel Ăngel. Universidad de Alicante; EspañaFil: Canals, Antonio. Universidad de Alicante; EspañaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin
DegradaciĂłn de contaminantes emergentes en agua, empleando procesos de oxidaciĂłn avanzada
El agua es un recurso escaso cuyo uso inadecuado como medio de deposiciĂłn final de residuos estĂĄ generando un deterioro alarmante. En los Ășltimos años, debido a la mayor sensibilidad de los mĂ©todos analĂticos, se han detectado un grupo de contaminantes denominados Contaminantes Emergentes (CE) cuya presencia en el ambiente no es necesariamente nueva, pero el aumento progresivo de su concentraciĂłn presenta un factor de riesgo para los seres vivos1 , donde los fĂĄrmacos y principalmente los antibiĂłticos son los CE que provocan mayor preocupaciĂłn. Los procesos de tratamiento de aguas residuales convencionales no son suficientes para eliminar los antibiĂłticos1 , pudiendo estos llegar a las aguas de consumo. Por esta razĂłn, en este trabajo se seleccionĂł como fĂĄrmaco de estudio la oxitetraciclina, tetraciclina ampliamente usada en veterinaria y medicina humana, para determinar su degradaciĂłn mediante Procesos de OxidaciĂłn Avanzada (POAs). Estos se basan en la generaciĂłn de radicales libres capaces de producir modificaciones profundas en la estructura molecular de los CE y eliminar total o parcialmente su presencia en aguas naturales2 . Los POA estudiados fueron irradiaciĂłn UV, ozonizaciĂłn y sonicaciĂłn. En base a los grĂĄficos presentados en las figuras 1 y 2, puede observarse que la ozonizaciĂłn es el POA que impacta en mayor medida sobre la estructura de las tetraciclinas, mientras que la irradiaciĂłn UVC y la energĂa de ultrasonidos poseen un efecto prĂĄcticamente nulo a las concentraciones estudiadas. La presencia de intermediarios de reacciĂłn se explora por cromatografĂa lĂquida de alta performance, acoplada con espectroscopia de masas. Se busca determinar posibles efectos sinĂ©rgicos por la combinaciĂłn de los POAs elegidos.Fil: Samuelsen Lucea, Claus. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Butler, Matias. Universidad Nacional de San MartĂn. Instituto de InvestigaciĂłn e IngenierĂa Ambiental. - Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Parque Centenario. Instituto de InvestigaciĂłn e IngenierĂa Ambiental; ArgentinaFil: Candal, Roberto Jorge. Universidad Nacional de San MartĂn. Instituto de InvestigaciĂłn e IngenierĂa Ambiental. - Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Parque Centenario. Instituto de InvestigaciĂłn e IngenierĂa Ambiental; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaXI Congreso Argentino de QuĂmica AnalĂtcaCorrientesArgentinaAsociaciĂłn Argentina de QuĂmicos AnalĂticosUniversidad Nacional del Nordest
Tracking Microwave-Assisted Sample Preparation through the last years
Sample preparation assisted by microwave irradiation has noticeablyincreased over the past decade, reducing the time spent on this step, due toits heating mechanism. The daily laboratory analysis has benefited from the useof microwave-assisted processes, which are rapid and efficient. Furthermore,the improvement of analytical results is considerable in comparison withconventional procedures even dealing with complex matrices. In the current literature, many detection techniques are reported inthe determination of trace elements and organic compounds using differentmicrowave-assisted techniques for treating samples of diverse origin.The aim of this chapter is to gather information in relationtowell-established microwave applications in analytical chemistry such asassisted digestion, combustion and extraction techniques, distillation andderivatization and finally new tendencies in on-line sample preparation usingmicrowave energy.Fil: Ălvarez, MĂłnica Beatriz. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Acebal, Carolina Cecilia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lista, Adriana Guillermina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin
In-syringe ultrasound-assisted dispersive liquidâliquid microextraction for the fluorescent determination of aluminum in water and milk samples
In this work, a simple, fast and environmentally friendly procedure to determine aluminum in water and milk samples was developed. Aluminum is an element that can be found in packaging as well as in different containers. The World Health Organization has fixed limits for the presence of aluminum in drinking water and food. Therefore, it is important to develop new reliable procedures for its determination. This new procedure was performed by means of an in-syringe dispersive liquidâliquid microextraction using a mixture of an ionic liquid ([Bmim]PF6) as extractant, and a surfactant (Triton X-100) as dispersive solvent. The dispersive liquidâliquid microextraction was assisted by ultrasound. 8-hydroxyquinoline was used as a chelating agent with a subsequent online spectrofluorometric detection. Under the optimal conditions, the preconcentration factor was 200, and the recovery values were between 91.4 and 115.6 % (n = 3) with satisfactory % Relative Standard Deviation values, which indicate appropriate accuracy and precision. The limits of detection were 1.7 and 5.5 ÎŒg Lâ1, and the limits of quantification were 5.7 and 18.4 ÎŒg Lâ1 for water and milk samples, respectively. The obtained results demonstrated the applicability of the proposed procedure for the determination of aluminum in water and milk samples. The main advantage of this research was the reduction of the extraction time (90 s) due to the application of ultrasound energy, which allowed for improved extraction and pre-concentration steps. In addition, the procedure was analyzed using the software AGREE metric, and the overall score obtained was compared with other procedures found in the literature for aluminum determination.Fil: Gomez, Natalia Andrea. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Lorenzetti, Anabela Silvana. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Camiña, JosĂ© Manuel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; ArgentinaFil: Garrido, Mariano Enrique. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; ArgentinaFil: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - BahĂa Blanca. Instituto de QuĂmica del Sur. Universidad Nacional del Sur. Departamento de QuĂmica. Instituto de QuĂmica del Sur; Argentin