{"id":4521,"date":"2026-10-13T16:13:50","date_gmt":"2026-10-13T16:13:50","guid":{"rendered":"https:\/\/nhdbio.com\/?page_id=4521"},"modified":"2026-10-13T16:13:50","modified_gmt":"2026-10-13T16:13:50","slug":"ejemplo-practico-de-recuperacion-con-filtro-de-peptidos","status":"publish","type":"page","link":"https:\/\/nhdbio.com\/es\/analytical-methods\/peptide-filter-recovery-worked-example\/","title":{"rendered":"La se\u00f1al del p\u00e9ptido disminuye despu\u00e9s de la filtraci\u00f3n: \u00bflo est\u00e1 reteniendo el filtro?"},"content":{"rendered":"<section class=\"nhd-cp-topic\" id=\"nhd-cp-topic-knowledge-20261013-05\">\n<p class=\"nhd-cp-lead\">Una ca\u00edda de se\u00f1al despu\u00e9s de la filtraci\u00f3n no significa necesariamente que todo el p\u00e9ptido haya sido adsorbido por la membrana. Primero alinee las condiciones de muestreo, volumen y detecci\u00f3n para saber en qu\u00e9 paso se perdi\u00f3 la muestra.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/nhd-knowledge-20261013-05.webp\" alt=\"Ilustraci\u00f3n c\u00f3mica del tema tratado en esta gu\u00eda\"><figcaption>Ilustraci\u00f3n editorial; no es una fotograf\u00eda experimental.<\/figcaption><\/figure>\n<h3>Primero distinga se\u00f1al, concentraci\u00f3n y cantidad recuperada<\/h3>\n<p>La se\u00f1al del instrumento es una lectura de medici\u00f3n, la concentraci\u00f3n es la cantidad por unidad de volumen, y la cantidad recuperada tambi\u00e9n requiere multiplicar por el volumen real recogido. Comparar solo las alturas de pico antes y despu\u00e9s de la filtraci\u00f3n f\u00e1cilmente confunde cambios en la respuesta de detecci\u00f3n o en el volumen con p\u00e9rdida de material.<\/p>\n<p>La muestra puede quedar en la membrana o el soporte, puede adsorberse en las superficies, puede precipitar durante el manejo, o puede mostrar una respuesta m\u00e1s d\u00e9bil debido a las condiciones de detecci\u00f3n. Las interacciones entre el material de la membrana, la muestra y el disolvente necesitan verificaci\u00f3n espec\u00edfica.<\/p>\n<h3>Un conjunto de datos hipot\u00e9ticos: recuperaci\u00f3n por concentraci\u00f3n y recuperaci\u00f3n total no son lo mismo<\/h3>\n<p>Before filtration: 1.00 mL, concentration 100 \u03bcg\/mL, total 100 \u03bcg. After filtration, actually collected 0.80 mL, concentration 80 \u03bcg\/mL, total 64 \u03bcg. Compared by concentration it is 80%, but compared by total it is 64%.<\/p>\n<p>This data only demonstrates how to calculate; it does not represent the true performance of any membrane. If concentration is converted from a detection method, the method&#039;s own calibration and applicability must also be reasonable.<\/p>\n<h3>\u00bfC\u00f3mo se hace una comparaci\u00f3n \u00fatil antes y despu\u00e9s?<\/h3>\n<p>Divida una porci\u00f3n de control y una porci\u00f3n filtrada de la misma muestra homog\u00e9nea. El control debe someterse en la medida de lo posible al mismo tiempo de espera, transferencias de recipiente y diluci\u00f3n, omitiendo solo el paso de filtraci\u00f3n que se investiga. Registre el dispositivo de filtraci\u00f3n, el lote, el volumen procesado, el volumen real recogido y el tiempo.<\/p>\n<p>Mantenga los m\u00e9todos y las condiciones de inyecci\u00f3n comparables al medir muestras antes y despu\u00e9s. Los blancos de detecci\u00f3n pueden ayudar a descartar interferencias de la membrana o del disolvente. Si se necesitan recuperaciones fortificadas u otros controles debe decidirse seg\u00fan el m\u00e9todo y el prop\u00f3sito de la investigaci\u00f3n.<\/p>\n<h3>Una vez obtenidos los resultados, localice primero la causa y luego cambie las condiciones<\/h3>\n<p>Si el volumen recogido es bajo, revise primero la retenci\u00f3n del dispositivo y los registros de operaci\u00f3n; si la concentraci\u00f3n disminuye, examine entonces la adsorci\u00f3n, la precipitaci\u00f3n o cambios en la respuesta de detecci\u00f3n. Ambos pueden ocurrir al mismo tiempo, y un solo porcentaje no puede identificar la causa.<\/p>\n<p>Despu\u00e9s de cambiar el material de la membrana, el volumen procesado u otros pasos, deben verificarse de nuevo el rendimiento de recuperaci\u00f3n y el an\u00e1lisis. No deduzca a partir de una se\u00f1al mejorada que la membrana es adecuada para todos los p\u00e9ptidos y todas las concentraciones.<\/p>\n<h3>Write \u201ceffective recovery\u201d as a record that can be rechecked<\/h3>\n<p>El informe debe indicar claramente si la recuperaci\u00f3n se calcula por concentraci\u00f3n, \u00e1rea de pico o total, y si se corrigieron el volumen y la diluci\u00f3n. Esto permite que otros recalculen el mismo resultado y conecta la resoluci\u00f3n de problemas de p\u00e9rdida con experimentos de seguimiento.<\/p>\n<figure class=\"nhd-cp-diagram\"><figcaption class=\"nhd-cp-flow-title\">Datos hipot\u00e9ticos antes y despu\u00e9s de la filtraci\u00f3n<\/figcaption><div class=\"nhd-cp-steps\">\n<div class=\"nhd-cp-step\"><b>Antes de la filtraci\u00f3n<\/b><span>Concentration: 100 \u03bcg\/mL<\/span><span>Volumen: 1.00 mL<\/span><span>Total: 100 \u03bcg<\/span><\/div>\n<div class=\"nhd-cp-step\"><b>Despu\u00e9s de la filtraci\u00f3n<\/b><span>Concentration: 80 \u03bcg\/mL<\/span><span>Volumen: 0.80 mL<\/span><span>Total: 64 \u03bcg<\/span><\/div>\n<\/div><figcaption>Resumen did\u00e1ctico. Verifique la explicaci\u00f3n y las fuentes originales; esto no es un modelo molecular a escala ni el resultado de una prueba de producto.<\/figcaption><\/figure>\n<div class=\"nhd-cp-table\">\n<table>\n<caption>Datos hipot\u00e9ticos antes y despu\u00e9s de la filtraci\u00f3n<\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Etapa<\/th>\n<th scope=\"col\">Concentraci\u00f3n<\/th>\n<th scope=\"col\">Volumen<\/th>\n<th scope=\"col\">Total<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Antes de la filtraci\u00f3n<\/td>\n<td>100 \u03bcg\/mL<\/td>\n<td>1.00 mL<\/td>\n<td>100 \u03bcg<\/td>\n<\/tr>\n<tr>\n<td>Despu\u00e9s de la filtraci\u00f3n<\/td>\n<td>80 \u03bcg\/mL<\/td>\n<td>0.80 mL<\/td>\n<td>64 \u03bcg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<details>\n<summary>Intenta juzgarlo t\u00fa mismo: fij\u00e1ndote solo en la concentraci\u00f3n, \u00bfes completa reportar una recuperaci\u00f3n de 80%?<\/summary>\n<p>No es completa. Si lo que importa es cu\u00e1nto p\u00e9ptido recuperaste, tambi\u00e9n hay que contar el volumen recogido; en este ejemplo hipot\u00e9tico, la recuperaci\u00f3n total es 64%.<\/p>\n<\/details>\n<p><a class=\"nhd-cp-download\" href=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/nhd-knowledge-20261013-worksheet-05.txt\" download>Descargue la hoja de trabajo en chino (TXT; copie y edite seg\u00fan sea necesario)<\/a><\/p>\n<section class=\"nhd-cp-depth\">\n<h3>Evite atribuir toda p\u00e9rdida a la membrana<\/h3>\n<p>Compare a direct aliquot, an aliquot transferred without filtration, and a filtered aliquot. Record collected volumes. Knowing that 100 \u03bcg was present initially and 64 \u03bcg was recovered identifies a 36 \u03bcg shortfall; it does not allocate that amount among containers, the device, precipitate or other steps.<\/p>\n<h3>\u00bfQu\u00e9 muestra un estudio de adsorci\u00f3n real?<\/h3>\n<p>Un estudio de 2015 HPLC de mastopar\u00e1n X, melitina y magainina 2 inform\u00f3 p\u00e9rdidas de 90% o m\u00e1s en algunas condiciones de recipiente. Estudi\u00f3 esos p\u00e9ptidos y recipientes; el porcentaje no es una tasa de recuperaci\u00f3n para un filtro particular, LL-37 ni un producto NHD.<\/p>\n<p>A useful filtration record states sample identity, processed and collected volumes, the concentration basis and the control results. \u201cGood recovery\u201d alone cannot be recalculated or applied confidently to another sample.<\/p>\n<p class=\"nhd-cp-source\"><a href=\"https:\/\/journals.plos.org\/plosone\/article?id=10.1371\/journal.pone.0122419\" target=\"_blank\" rel=\"noopener\">Adsorci\u00f3n de p\u00e9ptidos cati\u00f3nicos a superficies s\u00f3lidas de vidrio y pl\u00e1stico<\/a> \u00b7 2015<\/p>\n<\/section>\n<h3>Fuentes originales y lecturas adicionales<\/h3>\n<ul class=\"nhd-cp-source\">\n<li><a href=\"https:\/\/www.waters.com\/waters\/en_IE\/Peptide-Bioanalysis\/nav.htm?cid=135041966&amp;locale=en_IE\" target=\"_blank\" rel=\"noopener\">Bioan\u00e1lisis de p\u00e9ptidos y uni\u00f3n no espec\u00edfica<\/a><\/li>\n<\/ul>\n<p class=\"nhd-cp-source\">Fuentes verificadas el 2026-10-13. Los hallazgos se aplican a los modelos y materiales estudiados. La calidad del lote requiere registros del lote real.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Una ca\u00edda de se\u00f1al despu\u00e9s de la filtraci\u00f3n no significa necesariamente que todo el p\u00e9ptido haya sido adsorbido por la membrana. Primero alinee las condiciones de muestreo, volumen y detecci\u00f3n para saber en qu\u00e9 paso se perdi\u00f3 la muestra.<\/p>","protected":false},"author":1,"featured_media":4528,"parent":865,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4521","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Peptide signal drops after filtration: is the filter retaining it? | NHD<\/title>\n<meta name=\"description\" content=\"A drop in signal after filtration is not necessarily all peptide adsorbed by the membrane. 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