{"id":48014,"date":"2026-04-30T11:05:57","date_gmt":"2026-04-30T09:05:57","guid":{"rendered":"https:\/\/www.ssef.ch\/?p=48014"},"modified":"2026-04-30T11:05:57","modified_gmt":"2026-04-30T09:05:57","slug":"spectrofluorometer-new-instrument-at-ssef","status":"publish","type":"post","link":"https:\/\/www.ssef.ch\/zh-hans\/spectrofluorometer-new-instrument-at-ssef\/","title":{"rendered":"Spectrofluorometer: New instrument at SSEF"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"48014\" class=\"elementor elementor-48014\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7e59a34 e-flex e-con-boxed qodef-elementor-content-no e-con e-parent\" data-id=\"7e59a34\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-30c8b01 elementor-widget elementor-widget-text-editor\" data-id=\"30c8b01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>By Dr. Markus W\u00e4lle, first published in <a href=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/02\/facette-2026-web.pdf\" target=\"_blank\" rel=\"noopener\">Facette 30<\/a> (March 2026)<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f781946 elementor-widget elementor-widget-text-editor\" data-id=\"f781946\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>We have acquired a new instrument at SSEF: a JASCO FP-8550 spectrofluorometer.<br \/>A spectrofluorometer is a device that can measure fluorescence excitation and emission spectra. It can record an emission spectrum with a fixed excitation wavelength, an excitation spectrum with a fixed emission wavelength, or a combination of the two. This results in a three-dimensional dataset, an excitation- emission matrix, which can be visualised as a heat map, contour plot, surface plot, etc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04fc55f elementor-widget elementor-widget-image\" data-id=\"04fc55f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo.jpg\" class=\"attachment-large size-large wp-image-48024\" alt=\"\" srcset=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo.jpg 1024w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo-300x200.jpg 300w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo-768x512.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 1: ASCO FP-8550 Spectrofluorometer. Photo: A. Castillon, SSEF.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-842aec0 elementor-widget elementor-widget-image\" data-id=\"842aec0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo-figure-2.jpg\" class=\"attachment-large size-large wp-image-48030\" alt=\"\" srcset=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo-figure-2.jpg 1024w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo-figure-2-300x200.jpg 300w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a_spectrofluo-figure-2-768x512.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 2: Sample holder for minerals. Photo: A. Castillon, SSEF.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a13bda elementor-widget elementor-widget-text-editor\" data-id=\"0a13bda\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Fluorescence, a form of luminescence, can occur in gemstones due to trace elements (e.g. Chromium R-lines at 693 and 694 nm in rubies), the absence of anions (F-centres) or other defects in the crystal lattice. The contribution of trace elements to the fluorescence of a gemstone is usually well understood; however, F-centres and other defects are more difficult to identify. Furthermore, the instrument allows us to study luminous substances such as fillers within gem materials. A broader description of the possibilities of spectro-fluorescence can be found in a review article by Zhang and Shen (2023).<\/p><p>Our instrument has an excitation wavelength range of 200 nm (deep UV) to 850 nm (NIR) and can record several fluorescence spectra over a range of different excitation wavelengths. It is also equipped with a special sample holder for solid samples, as these instruments are usually used to analyse solutions.<\/p><p>This enables fluorescence \u2018maps\u2019 to be recorded, providing a clearer picture of the fluorescence of gemstones. See Figure 3 for an example of a fluorescence spectrum map of a sapphire. The chromium fluorescence line at 694 nm can be seen in the spectrum map, as can the UV reaction. Additionally, the instrument can analyse luminescence lifetimes as long as they are in the millisecond time range.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2573e0c elementor-widget elementor-widget-image\" data-id=\"2573e0c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"684\" src=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a-FacetteFluoro_Fig3.jpg\" class=\"attachment-large size-large wp-image-48036\" alt=\"\" srcset=\"https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a-FacetteFluoro_Fig3.jpg 1024w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a-FacetteFluoro_Fig3-300x200.jpg 300w, https:\/\/www.ssef.ch\/wp-content\/uploads\/2026\/03\/427a-FacetteFluoro_Fig3-768x513.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 3: Example of a Fluorescence spectrum from a sapphire. Chromium R-lines are visible at 694nm emission and UV reaction is visible at 420nm emission and 235nm excitation. Image: SSEF.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fec818d elementor-widget elementor-widget-spacer\" data-id=\"fec818d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a54ac84 elementor-widget elementor-widget-text-editor\" data-id=\"a54ac84\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>References<\/h4><p>Zhang, Z., Shen, A., 2023, Fluorescence and Phosphorescence Spectroscopies and Their Applications in Gem Characterization. Minerals, 13, 626. https:\/\/doi.org\/10.3390\/min13050626<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33214dd elementor-widget elementor-widget-spacer\" data-id=\"33214dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>We have acquired a new instrument at SSEF: a JASCO FP-8550 spectrofluorometer. A spectrofluorometer is a device that can measure fluorescence excitation and emission spectra.<\/p>\n","protected":false},"author":3,"featured_media":48016,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[626],"tags":[741,730],"library_category":[],"library_author":[],"class_list":["post-48014","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-blog","tag-geochemistry","tag-methods"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spectrofluorometer: New instrument at SSEF - SSEF<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ssef.ch\/spectrofluorometer-new-instrument-at-ssef\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spectrofluorometer: New instrument at SSEF - SSEF\" \/>\n<meta property=\"og:description\" content=\"We have acquired a new instrument at SSEF: a JASCO FP-8550 spectrofluorometer. 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