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Espectrofotómetro UV-Vis: Principio de funcionamiento y aplicaciones principales

A UV-Vis spectrophotometer measures how much ultraviolet and visible light a sample absorbs, and at which wavelengths. Light from a deuterium or tungsten lamp passes through a monochromator, through the sample, and onto a detector, where the transmitted intensity is converted into absorbance and then into concentration through the Beer-Lambert law. This guide walks the optical path stage by stage, explains what the UV and visible regions can tell you, maps the main application areas across pharmaceutical, ambiental, food and industrial laboratories, sets out the five specifications that decide real work, and shows how the available configurations differ from routine colorimetric benches to research-grade double-beam systems.

Por |2026-10-27T13:39:21+08:00octubre 16, 2026|Blog|0 Comentarios

Procedimiento de prueba de resistencia al fuego para materiales de construcción

A fire resistance test procedure is a full-scale furnace test: an element of construction is built into a restraint frame, loaded if it is loadbearing, heated along a standard time-temperature curve, and monitored until it fails one of three criteria or survives the required exposure period. The three criteria are loadbearing capacity (R), integrity (mi) and insulation (I). This guide walks the procedure through in the order a laboratory runs it - the standard fire curves, the specimen and conditioning stages, the instrumentation that decides the result, the exact pass and fail thresholds, the element-specific parts of EN 1364, EN 1365, EN 1634 y ES 13381, and the calibration and direct-application rules that decide how far a single test result can be used.

Prueba de no combustibilidad (ISO 1182): Criterios y aparatos

The non-combustibility test decides whether a material can be declared non-combustible at all. This guide covers the 750 C furnace procedure, the pass criteria used in Europe, América del norte, China and marine work, and how to specify an apparatus that still meets the editions now in force.

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