{"id":7214,"date":"2026-10-06T13:30:11","date_gmt":"2026-10-06T11:30:11","guid":{"rendered":"https:\/\/scispx.com\/?post_type=instruments&#038;p=7214"},"modified":"2026-10-09T15:14:05","modified_gmt":"2026-10-09T13:14:05","slug":"spectrometre-de-fluorescence","status":"publish","type":"instruments","link":"https:\/\/scispx.com\/fr\/instruments\/fluorescence-spectrometer\/","title":{"rendered":"FE30"},"content":{"rendered":"<h2>Fluorescence spectrometer<\/h2>\n<p>Le FE30 est un spectrom\u00e8tre de fluorescence haute sensibilit\u00e9 con\u00e7u pour les mesures de fluorescence dans les applications de recherche, d\u2019analyse de routine et de laboratoire. Il associe un syst\u00e8me optique sensible \u00e0 une acquisition spectrale rapide et \u00e0 une plage de longueurs d\u2019onde s\u2019\u00e9tendant jusqu\u2019\u00e0 900 nm.<\/p>\n<p>Avec un rapport signal\/bruit Raman de l\u2019eau pouvant atteindre <strong>20 000:1 RMS-BG<\/strong> et des vitesses de balayage allant jusqu\u2019\u00e0 <strong>60 000 nm\/min<\/strong>, le FE30 peut mesurer de faibles signaux de fluorescence tout en permettant l\u2019acquisition rapide de spectres d\u2019excitation, d\u2019\u00e9mission et de fluorescence 3D.<\/p>\n<h3><strong>Mesures de fluorescence \u00e0 haute sensibilit\u00e9<\/strong><\/h3>\n<p>Le FE30 associe un syst\u00e8me optique et \u00e9lectronique performant \u00e0 une lampe au x\u00e9non haute intensit\u00e9 de 150 W et \u00e0 un d\u00e9tecteur PMT. Cette configuration offre la sensibilit\u00e9 n\u00e9cessaire pour d\u00e9tecter des signaux de fluorescence relativement faibles ainsi que des \u00e9chantillons \u00e0 faible concentration.<\/p>\n<p>Dans les conditions sp\u00e9cifi\u00e9es pour la mesure Raman de l\u2019eau, le FE30 atteint un rapport signal\/bruit de <strong>1 000:1 RMS-PK et 20 000:1 RMS-BG<\/strong>.<\/p>\n<p>Les largeurs de bande d\u2019excitation et d\u2019\u00e9mission peuvent \u00eatre s\u00e9lectionn\u00e9es parmi 1, 2,5, 5, 10 et 20 nm, ce qui permet d\u2019adapter les conditions de mesure \u00e0 la sensibilit\u00e9 et \u00e0 la r\u00e9solution spectrale requises.<\/p>\n<h3><strong>Mesures de fluorescence jusqu'\u00e0 900 nm<\/strong><\/h3>\n<p>Les plages de longueurs d\u2019onde d\u2019excitation et d\u2019\u00e9mission s\u2019\u00e9tendent toutes deux de <strong>200 \u00e0 900 nm<\/strong>. Cela permet au FE30 de r\u00e9aliser des mesures de fluorescence dans les r\u00e9gions UV et visible ainsi qu\u2019\u00e0 des longueurs d\u2019onde plus \u00e9lev\u00e9es.<\/p>\n<p>Cette plage \u00e9tendue est particuli\u00e8rement utile pour les fluorophores qui absorbent ou \u00e9mettent \u00e0 des longueurs d\u2019onde \u00e9lev\u00e9es et \u00e9largit le champ d\u2019application de l\u2019instrument.<\/p>\n<h3><strong>Modes de mesure de fluorescence flexibles<\/strong><\/h3>\n<p>Le FE30 prend en charge plusieurs modes de mesure via le logiciel Spectracle, permettant son utilisation aussi bien pour des analyses de routine que pour une caract\u00e9risation avanc\u00e9e des \u00e9chantillons.<\/p>\n<h4>Balayages d'excitation et d'\u00e9mission<\/h4>\n<p>Les spectres d\u2019excitation et d\u2019\u00e9mission peuvent \u00eatre enregistr\u00e9s afin d\u2019\u00e9tudier les caract\u00e9ristiques de fluorescence d\u2019un \u00e9chantillon. Le balayage synchrone des longueurs d\u2019onde est \u00e9galement disponible.<\/p>\n<h4>Suivi temporel<\/h4>\n<p>Les mesures cin\u00e9tiques permettent de suivre l'\u00e9volution de la fluorescence au fil du temps, notamment dans le cadre d'applications telles que l'activit\u00e9 enzymatique et d'autres r\u00e9actions.<\/p>\n<h4>Balayage par fluorescence en 3D<\/h4>\n<p>Le balayage 3D fournit une vue d\u2019ensemble des caract\u00e9ristiques de fluorescence d\u2019un \u00e9chantillon sur diff\u00e9rentes longueurs d\u2019onde d\u2019excitation et d\u2019\u00e9mission. Les cartes excitation-\u00e9mission obtenues peuvent \u00eatre utilis\u00e9es pour la caract\u00e9risation des \u00e9chantillons, l\u2019analyse d\u2019empreintes de fluorescence et la mod\u00e9lisation avanc\u00e9e.<\/p>\n<p>Gr\u00e2ce \u00e0 des vitesses de balayage allant jusqu\u2019\u00e0 60 000 nm\/min, le FE30 peut acqu\u00e9rir les donn\u00e9es n\u00e9cessaires \u00e0 l\u2019obtention de spectres 3D en quelques minutes.<\/p>\n<h4>Quantification<\/h4>\n<p>Des courbes d\u2019\u00e9talonnage peuvent \u00eatre cr\u00e9\u00e9es pour les analyses quantitatives de fluorescence, y compris des \u00e9talonnages de premier et de second ordre. Ces courbes peuvent ensuite \u00eatre utilis\u00e9es pour d\u00e9terminer la concentration d\u2019\u00e9chantillons inconnus \u00e0 partir de leur r\u00e9ponse en fluorescence.<\/p>\n<h4>Anisotropie de fluorescence<\/h4>\n<p>Avec l\u2019accessoire de polarisation appropri\u00e9, le FE30 peut r\u00e9aliser des mesures de polarisation et d\u2019anisotropie de fluorescence pour des applications en biochimie et en biophysique.<\/p>\n<h3><strong>Validation des instruments<\/strong><\/h3>\n<p>Les fonctions de validation int\u00e9gr\u00e9es permettent aux laboratoires de v\u00e9rifier les performances du FE30. Le logiciel prend en charge les balayages Raman automatiques de l\u2019eau pour l\u2019\u00e9valuation du rapport signal\/bruit ainsi que les contr\u00f4les de pr\u00e9cision des longueurs d\u2019onde d\u2019excitation et d\u2019\u00e9mission.<\/p>\n<p>Cela constitue un moyen pratique de surveiller les performances de l\u2019instrument dans le cadre des flux de travail de laboratoire de routine.<\/p>\n<h3><strong>Manipulation des \u00e9chantillons et accessoires<\/strong><\/h3>\n<p>Le FE30 dispose d\u2019une grande chambre d\u2019\u00e9chantillon capable d\u2019accueillir diff\u00e9rents porte-\u00e9chantillons et accessoires. Cela permet d\u2019\u00e9tendre les mesures au-del\u00e0 des \u00e9chantillons liquides standard \u00e0 des liquides sous contr\u00f4le de temp\u00e9rature, des poudres et des films minces.<\/p>\n<p><strong>Options disponibles :<\/strong><\/p>\n<ul>\n<li>Porte-cuve standard pour cuves de fluorescence de 10 mm<\/li>\n<li>Porte-cuve thermostatique \u00e0 bain d\u2019eau pour mesures sous contr\u00f4le de temp\u00e9rature<\/li>\n<li>Porte-\u00e9chantillon solide \u00e0 angle variable pour poudres et films minces<\/li>\n<li>Porte-\u00e9chantillon pour micro-poudres destin\u00e9 aux faibles quantit\u00e9s de poudre<\/li>\n<li>Accessoire polariseur pour mesures d\u2019anisotropie de fluorescence<\/li>\n<li>Support de source laser pour le couplage d\u2019un laser d\u2019excitation externe<\/li>\n<\/ul>\n<p>Le porte-\u00e9chantillon solide \u00e0 angle variable permet une rotation continue sur 360\u00b0 et des angles de mesure de 0 \u00e0 90\u00b0, tandis que le porte-cuve thermostatique permet des mesures \u00e0 des temp\u00e9ratures d\u2019environ 0 \u00e0 100 \u00b0C.<\/p>\n<h3><strong>Applications<\/strong><\/h3>\n<p>Le FE30 peut \u00eatre utilis\u00e9 pour les mesures de fluorescence dans de nombreux domaines de recherche et d\u2019analyse, notamment :<\/p>\n<ul>\n<li>Analyse alimentaire<\/li>\n<li>Biologie mol\u00e9culaire<\/li>\n<li>Chimie<\/li>\n<li>Sciences de la vie<\/li>\n<li>Analyse environnementale<\/li>\n<li>Science des mat\u00e9riaux<\/li>\n<li>Recherche sur les semi-conducteurs<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Spectrom\u00e8tre de fluorescence \u00e0 haute 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