Video Experimental Relacionado
Updated: Jan 25, 2026
07:18
Natural Product Discovery with LC-MS/MS Diagnostic Fragmentation Filtering: Application for Microcystin Analysis
Published on: May 31, 2019
9.4K
241Am: Un nuevo radionúclido para la producción y calibración de filtros alfa de referencia
Grégoire Dougniaux1, Benoît Sabot2, Bernadette Dhieux Lestaevel1
1Autorité de Sûreté Nucléaire et de Radioprotection (ASNR), PSN-RES/SCA/LPMA, Saclay, F-91400, France.
Resumen
El Americio-241 (241Am) ofrece un método trazable y no destructivo para calibrar instrumentos de medición de partículas alfa, mejorando la seguridad nuclear y la monitorización ambiental. Este radionúclido evita los desafíos asociados con la destrucción de filtros de Plutonio-239 (239Pu) y el conteo por centelleo líquido.
Sus antecedentes:
- La medición precisa de la actividad de radionucleidos en filtros es crucial para la seguridad nuclear y la monitorización ambiental.
- Los métodos actuales que utilizan Plutonio-239 (239Pu) para la calibración de partículas alfa requieren la destrucción del filtro, lo que genera desafíos prácticos e incertidumbres.
- Se propone el Americio-241 (241Am) como un radionúclido de referencia alternativo debido a sus propiedades adecuadas para mediciones alfa y análisis no destructivos.
Conclusiones:
- El Americio-241 (241Am) es un radionúclido de referencia adecuado para la calibración de filtros alfa, ofreciendo trazabilidad y medición no destructiva.
- La adopción de 241Am mejora la fiabilidad de la monitorización de la contaminación radiactiva al superar los desafíos prácticos asociados con el 239Pu.
- El método desarrollado utilizando 241Am mejora la precisión y la eficiencia de los procesos de seguridad nuclear y monitorización ambiental.
Videos de Conceptos Relacionados
01:11Glassware Calibration
1.3K
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
1.3K
01:16Other Nuclides: 31P, 19F, 15N NMR
762
Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
762
01:27Passive Filters
971
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
971
01:25Active Filters
1.3K
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
1.3K
01:12Instrument Calibration
695
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
695
01:03Inertial Frames of Reference
8.7K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
8.7K