Determinación espectroquímica de arsénico en latones tipo almirantazgo

Se analizaron tubos de latones por método químico para seleccionar aquéllos que por su composición y contenido en arsénico podían ser usados como patrones espectrográficos. Para el análisis espectrográfico se empleó como sistema de electrodos el de punta-plano: un trozo de tubo aplastado para formar una superficie plana, y como contraelectrodo, grafito. La excitación empleada es la de uni-arc de la Fuente "Jaco SP Custom Varisource". La precisión obtenida es inferior a la lograda por vía química, pero está dentro de los límites tolerables con las exigencias del material. Se obtiene una ganancia apreciable de tiempo en la información de los resultados.Brass tubes were chemically analysed looking for those suitable as spectrographic standards because of their composition and arsenic contents. The point-to-plane electrode system was used for the spectrographic analysis, i.e., a piece of flattened tube to obtain a smooth surface, and graphite as counterelectrode. The material was excited by means of the Uni-Arc of a Jaco SP Custon Varisource. Precision thus obtained was poorer than that attained via chemical methods, but keeps within allowable limits for the material specifications. The method is definitely timesaving

Determinación espectroquímica de impurezas en plata

Con el fin de verificar el grado de pureza de la plata empleada principalmente para la fabricación de fusibles, se ha aplicado el análisis espectroquímico por su gran sensibilidad y rapidez. Debido a la gran variedad en el diámetro de los alambres y ante la imposibilidad de disponer de los patrones standard para cada medida, fue necesario disolver la muestra y realizar el análisis sobre las sales (nitratos). Las muestras standard se prepararon por el mismo procedimiento, empleando sustancias de pureza espectroscópica (Johnson Matthey). Esta técnica de análisis nos permite determinar once elementos (Cu, Cd, Pb, Ni, Sn, Al, Zn, Pt, Pd, Ir, Au). Se utilizo un espectrógrafo Z-3 (Jobin-Yvon), fuente de excitación G.M.60 (de Durr) y densitómetro 21-051 (Jarrell-Ash).Because of its great sensitivity and time-saving characteristics spectrochemical analysis has "been applied to the purity control of silver to he used mainly in fuse manufacture. As wires differ widely in their diameters and it is almost impossible to obtain standards por each size, it was necessary to disolve the sample and analize the resulting salts (nitrates). Standard samples were prepared making use of the procedure on spectroscopically pure materials (Johnson Matthey). This analytical technique allows the determination of eleven elements, i.e. Cu, Cd, Pb, Ni, Sn, Al, Zn, Pt, Pd, Ir, Au. Instrumentation used includes Jobin-Yvon Z-3 spectrograph, Durr G.M.60 excitation source and Jarrell-Ash,model 21-051 densitometer

Análisis espectroquímico del plomo emplealo en instalaciones de obras sanitarias

Para verificar la calidad del plomo empleado en cañerías de agua corriente se aplica el análisis espectroquímico por sus características de sensibilidad y rapidez. No existen en el mercado patrones Standards con la composición química que las Normas IRAM exigen para estos materiales. Por lo tanto, estos han sido elaborados y analizados por nosotros para la obtención de las curvas de trabajo. Se estudian las condiciones y tipo de excitación más eficiente para estos materiales. Se determinan los elementos Sb, Sn, Cu, Zn, As, Bi y Ag. Se empleó un Espectrógrafo Z-3 Jobin-Yvon; fuente de excitación GM 60 DURR; densitómetro modelo 21—051 JARRELL—Aish.Spectrochemical analysis is applied because of speed and sensitivity reasons, to check the quality of lead for tap water pipes. There are no standards according to IRAM specifications, commercially availables. The authors had to prepare and analyse such standards for the calibration and working curves. Best conditions and more efficient kind of excitation for these standards are studied'. The following elements have been determined; antimony, tin, copper, zinc, arsenic, bismuth and silver. Instrument used: Z—3 Jobin Yvon Spectrograph; GM 60 Lurr excitation source; Jarrell Ash, model 21—051 densitometer

A year in the life of the EU-CardioRNA COST action: CA17129 catalysing transcriptomics research in cardiovascular disease

The EU-CardioRNA Cooperation in Science and Technology (COST) Action is a European-wide consortium established in 2018 with 31 European country members and four associate member countries to build bridges between translational researchers from academia and industry who conduct research on non-coding RNAs, cardiovascular diseases and similar research areas. EU-CardioRNA comprises four core working groups (WG1-4). In the first year since its launch, EU-CardioRNA met biannually to exchange and discuss recent findings in related fields of scientific research, with scientific sessions broadly divided up according to WG. These meetings are also an opportunity to establish interdisciplinary discussion groups, brainstorm ideas and make plans to apply for joint research grants and conduct other scientific activities, including knowledge transfer. Following its launch in Brussels in 2018, three WG meetings have taken place. The first of these in Lisbon, Portugal, the second in Istanbul, Turkey, and the most recent in Maastricht, The Netherlands. Each meeting includes a scientific session from each WG. This meeting report briefly describes the highlights and key take-home messages from each WG session in this first successful year of the EU-CardioRNA COST Action