{"id":6201,"date":"2026-01-06T08:03:28","date_gmt":"2026-01-06T08:03:28","guid":{"rendered":"https:\/\/www.hcftir.com\/?p=6201"},"modified":"2026-09-24T12:36:08","modified_gmt":"2026-09-24T12:36:08","slug":"standard-operating-procedure-preparation-of-high-quality-kbr-pellets-for-ftir-analysis","status":"publish","type":"post","link":"https:\/\/www.hcftir.com\/es\/standard-operating-procedure-preparation-of-high-quality-kbr-pellets-for-ftir-analysis-article\/","title":{"rendered":"Procedimiento operativo est\u00e1ndar: Preparaci\u00f3n de gr\u00e1nulos de KBr de alta calidad para an\u00e1lisis FTIR"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Objetivo<\/h2>\n\n\n\n<p>Definir un proceso estandarizado para crear discos de muestra KBr de alta transmitancia y libres de impurezas, garantizando picos caracter\u00edsticos claros y minimizando la interferencia de la l\u00ednea de base en <a href=\"https:\/\/www.hcftir.com\/infrared-spectrometer-category\/\">Espectroscopia FTIR<\/a>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/KBr-samples-for-FTIR-analysis.webp\" alt=\"\" class=\"wp-image-6207\" srcset=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/KBr-samples-for-FTIR-analysis.webp 800w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/KBr-samples-for-FTIR-analysis-300x300.webp 300w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/KBr-samples-for-FTIR-analysis-150x150.webp 150w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/KBr-samples-for-FTIR-analysis-768x768.webp 768w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/KBr-samples-for-FTIR-analysis-12x12.webp 12w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">Especificaciones materiales y medioambientales<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pureza KBr:<\/strong> Utilice \u00fanicamente KBr de grado FTIR (grado espectral, pureza \u2265 99,99 %). Evite los grados anal\u00edtico o qu\u00edmico, ya que contienen trazas de carbonatos y nitratos que provocan picos fantasma.<\/li>\n\n\n\n<li><strong>Secado:<\/strong> El polvo de KBr debe cocerse en un horno a 120\u00b0C - 150\u00b0C durante al menos 2 horas. Almacenar en un desecador o en una c\u00e1mara de calentamiento a 60\u00b0C.<\/li>\n\n\n\n<li><strong>Control de la humedad:<\/strong> La humedad del laboratorio debe ser &lt; 50% HR (idealmente &lt; 40%). Realice todo el rectificado y montaje bajo una l\u00e1mpara de calentamiento por infrarrojos para evitar la r\u00e1pida absorci\u00f3n de humedad.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Preparaci\u00f3n del equipo<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mortero y maja:<\/strong> Utilice \u00fanicamente un juego de \u00e1gata. Las herramientas de vidrio o porcelana pueden introducir impurezas de s\u00edlice (causando picos de absorci\u00f3n a 1000 $cm^{-1}$).<\/li>\n\n\n\n<li><strong>Limpieza:<\/strong> Limpiar tres veces el mortero, la maja y las matrices con etanol anhidro. Seque al aire o con una pistola de calor; aseg\u00farese de que no queden restos de disolvente.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Procedimiento paso a paso<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">Fase A: Mezclar y triturar<\/h4>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Relaci\u00f3n de muestras:<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Absorbentes fuertes (org\u00e1nicos):<\/strong> Muestra : KBr = 1:200 a 1:500.<\/li>\n\n\n\n<li><strong>Absorbentes d\u00e9biles (inorg\u00e1nicos):<\/strong> Muestra : KBr = 1:50 a 1:100.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>T\u00e9cnica de rectificado:<\/strong> * Colocar primero la muestra en el mortero y moler hasta obtener un polvo fino.\n<ul class=\"wp-block-list\">\n<li>A\u00f1ada el KBr en 2-3 tandas. Realice un movimiento circular suave hasta que la mezcla sea homog\u00e9nea y la textura se parezca a la harina fina (tama\u00f1o de part\u00edcula \u2264 2 \u03bcm).<\/li>\n\n\n\n<li><em>Nota: Un rectificado excesivo puede aumentar la superficie y provocar una absorci\u00f3n excesiva de humedad.<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"987\" height=\"376\" src=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR.webp\" alt=\"C\u00f3mo preparar gr\u00e1nulos de KBr para FTIR\" class=\"wp-image-6205\" srcset=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR.webp 987w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-300x114.webp 300w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-768x293.webp 768w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-18x7.webp 18w\" sizes=\"auto, (max-width: 987px) 100vw, 987px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"987\" height=\"376\" src=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-2.webp\" alt=\"C\u00f3mo preparar gr\u00e1nulos de KBr para FTIR\" class=\"wp-image-6204\" srcset=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-2.webp 987w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-2-300x114.webp 300w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-2-768x293.webp 768w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-2-18x7.webp 18w\" sizes=\"auto, (max-width: 987px) 100vw, 987px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Fase B: Montaje y prensado de troqueles<\/h4>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Carga:<\/strong> Coloque la base del troquel sobre una superficie plana. Transfiera la mezcla a la base del troquel con una esp\u00e1tula peque\u00f1a. Golpee suavemente o gire el \u00e9mbolo para asegurarse de que el polvo se distribuye uniformemente.<\/li>\n\n\n\n<li><strong>Aspirado (Cr\u00edtico):<\/strong> Conectar la bomba de vac\u00edo al troquel. Haga el vac\u00edo para <strong>1-2 minutos<\/strong>. Esto elimina el aire atrapado, evitando la formaci\u00f3n de microburbujas y grietas bajo presi\u00f3n.<\/li>\n\n\n\n<li><strong>Ejercer presi\u00f3n:<\/strong> Coloque el troquel en la prensa hidr\u00e1ulica. Aumente lentamente la presi\u00f3n hasta <strong>8-10 toneladas<\/strong> (para un troquel est\u00e1ndar de 13 mm).<\/li>\n\n\n\n<li><strong>Mantenimiento a presi\u00f3n:<\/strong> Mantenga la presi\u00f3n durante <strong>60-90 segundos<\/strong> para permitir que los cristales de KBr se fusionen en una red unificada y transparente.<\/li>\n\n\n\n<li><strong>Liberaci\u00f3n controlada:<\/strong> <strong>Lentamente<\/strong> liberar la v\u00e1lvula de presi\u00f3n. La descompresi\u00f3n r\u00e1pida provoca tensiones internas, lo que da lugar a fracturas en \"tela de ara\u00f1a\" o discos \"turbios\".<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"984\" height=\"374\" src=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-3.webp\" alt=\"\" class=\"wp-image-6203\" srcset=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-3.webp 984w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-3-300x114.webp 300w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-3-768x292.webp 768w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-3-18x7.webp 18w\" sizes=\"auto, (max-width: 984px) 100vw, 984px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"984\" height=\"374\" src=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-4.webp\" alt=\"\" class=\"wp-image-6202\" srcset=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-4.webp 984w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-4-300x114.webp 300w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-4-768x292.webp 768w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/How-to-prepare-KBr-pellets-for-FTIR-4-18x7.webp 18w\" sizes=\"auto, (max-width: 984px) 100vw, 984px\" \/><\/figure>\n\n\n\n\n<h2 class=\"wp-block-heading\">Tonelaje, di\u00e1metro del troquel y tiempo de mantenimiento<\/h2>\n\n\n\n<p>El procedimiento anterior est\u00e1 escrito para un troquel est\u00e1ndar de 13 mm. Esos par\u00e1metros \u20148\u201310 toneladas de carga mantenidas 60\u201390 segundos tras un paso de vac\u00edo de 1\u20132 minutos\u2014 son los validados en este SOP. Cuando cambia el di\u00e1metro del troquel, el mismo <em>presi\u00f3n<\/em> requiere una mayor <em>carga<\/em>, porque la presi\u00f3n es la fuerza dividida por el \u00e1rea.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Di\u00e1metro del troquel<\/th><th>Carga t\u00edpica<\/th><th>Tiempo de mantenimiento<\/th><th>Notas<\/th><\/tr><\/thead><tbody>\n<tr><td>13 mm (pastilla FTIR est\u00e1ndar)<\/td><td>8-10 toneladas<\/td><td>60-90 segundos<\/td><td>Par\u00e1metros de este SOP; vac\u00edo 1\u20132 minutos antes del prensado<\/td><\/tr>\n<tr><td>Di\u00e1metros mayores<\/td><td>Proporcional al \u00e1rea de la pastilla<\/td><td>Igual o ligeramente mayor<\/td><td>Confirme la carga con el fabricante del troquel antes de prensar<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n<p>Implicaciones pr\u00e1cticas:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mantenga constante la presi\u00f3n, no el tonelaje.<\/strong> Duplicar el \u00e1rea de la pastilla con el mismo tonelaje reduce a la mitad la presi\u00f3n que recibe realmente el polvo.<\/li>\n<li><strong>El tiempo de mantenimiento estabiliza el resultado.<\/strong> Acortar el mantenimiento da una pastilla menos transparente incluso con la carga correcta.<\/li>\n<li><strong>Libere la presi\u00f3n lentamente.<\/strong> La velocidad de ca\u00edda de presi\u00f3n importa tanto como el valor m\u00e1ximo en muestras fr\u00e1giles.<\/li>\n<li><strong>Compruebe el rango de la prensa.<\/strong> Una prensa de sobremesa de 15 toneladas cubre las pastillas de 13 mm; los troqueles mayores suelen necesitar una prensa de 30\u201360 toneladas. La <a href=\"\/kbr-pellet\/press\/\">prensa para pastillas de KBr<\/a> p\u00e1gina compara modelos manuales y autom\u00e1ticos.<\/li>\n<\/ul>\n\n\n\n<p>Registre el di\u00e1metro del troquel, la carga y el tiempo de mantenimiento junto con los pasos de molienda y secado. Esos cuatro valores definen el m\u00e9todo y son lo que hace que la pastilla sea reproducible entre operarios. El <a href=\"\/kbr-pellet\/\">centro de preparaci\u00f3n de pastillas de KBr<\/a> enlaza el mortero, el polvo, el troquel y la prensa utilizados en cada etapa.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Inspecci\u00f3n de calidad (QC)<\/h2>\n\n\n\n<p>Un gr\u00e1nulo de KBr cualificado debe ser de semitransparente a transparente (como hielo fino), con una superficie lisa y sin granulosidad visible.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Observaci\u00f3n<\/strong><\/td><td><strong>Causa probable<\/strong><\/td><td><strong>Medidas correctoras<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Pellets opacos\/blancos<\/strong><\/td><td>Part\u00edculas grandes o baja presi\u00f3n<\/td><td>Aumentar el tiempo de molienda; comprobar el man\u00f3metro<\/td><\/tr><tr><td><strong>Parches nublados<\/strong><\/td><td>Aire o humedad atrapados<\/td><td>Asegurarse de que el vac\u00edo funciona; secar el KBr durante m\u00e1s tiempo.<\/td><\/tr><tr><td><strong>Grietas\/Fracturas<\/strong><\/td><td>Descompresi\u00f3n r\u00e1pida o carga desigual<\/td><td>Libere la presi\u00f3n m\u00e1s lentamente; nivele el polvo<\/td><\/tr><tr><td><strong>Gran pico de agua (3400 $cm^{-1}$)<\/strong><\/td><td>Humedad elevada o muestra h\u00fameda<\/td><td>Funcionar bajo l\u00e1mpara IR; secar la muestra hasta peso constante.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Mantenimiento posterior al an\u00e1lisis<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Control en blanco:<\/strong> Utilice siempre un \"Blank KBr Pellet\" (sin muestra) como fondo para sustraer la interferencia atmosf\u00e9rica $CO_2$ y residual $H_2O$.<\/li>\n\n\n\n<li><strong>Almacenamiento de troqueles:<\/strong> El KBr es altamente corrosivo para el acero. Inmediatamente despu\u00e9s de su uso, limpie todos los componentes del troquel con etanol, s\u00e9quelos y gu\u00e1rdelos en un desecador.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Resumen de las principales mejoras<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Terminolog\u00eda normalizada:<\/strong> Cambio a t\u00e9rminos est\u00e1ndar de la industria (por ejemplo, \"Grado espectral\", \"Prensa hidr\u00e1ulica\").<\/li>\n\n\n\n<li><strong>El paso del vac\u00edo:<\/strong> Se ha a\u00f1adido expl\u00edcitamente la fase de aspiraci\u00f3n, que es la raz\u00f3n m\u00e1s com\u00fan de los pellets fallidos (turbios) en los flujos de trabajo originales.<\/li>\n\n\n\n<li><strong>Tabla de resoluci\u00f3n de problemas:<\/strong> Proporciona una gu\u00eda de referencia r\u00e1pida para identificar y corregir los errores de preparaci\u00f3n m\u00e1s comunes.<\/li>\n\n\n\n<li><strong>Par\u00e1metros de presi\u00f3n:<\/strong> Se han aclarado los tonelajes y los tiempos de retenci\u00f3n para obtener resultados coherentes.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"946\" height=\"894\" src=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/FTIR-analysis.webp\" alt=\"An\u00e1lisis FTIR\" class=\"wp-image-6208\" srcset=\"https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/FTIR-analysis.webp 946w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/FTIR-analysis-300x284.webp 300w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/FTIR-analysis-768x726.webp 768w, https:\/\/www.hcftir.com\/wp-content\/uploads\/2026\/01\/FTIR-analysis-13x12.webp 13w\" sizes=\"auto, (max-width: 946px) 100vw, 946px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>Objective To define a standardized process for creating high-transmittance, impurity-free KBr sample discs, ensuring clear characteristic peaks and minimizing baseline interference in FTIR spectroscopy. Material &amp; Environmental Specifications Equipment Preparation Step-by-Step Procedure Phase A: Mixing and Grinding Phase B: Die Assembly and Pressing Tonnage, Die Diameter and Hold Time The procedure above is written for [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6206,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"class_list":["post-6201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Standard Operating Procedure: Preparation of High-Quality KBr Pellets for FTIR Analysis - Hench Technology<\/title>\n<meta name=\"description\" content=\"Learn the standard operating procedure for preparing high-quality KBr pellets for FTIR analysis. 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