{"id":5235,"date":"2021-02-11T08:03:10","date_gmt":"2021-02-11T16:03:10","guid":{"rendered":"https:\/\/www.linquip.com\/blog\/?p=5235"},"modified":"2023-02-15T04:03:02","modified_gmt":"2023-02-15T12:03:02","slug":"how-does-a-spectrophotometer-work","status":"publish","type":"post","link":"https:\/\/www.linquip.com\/blog\/how-does-a-spectrophotometer-work\/","title":{"rendered":"What Wikipedia Can\u2019t Tell You About How Does a Spectrophotometer Work"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.linquip.com\/blog\/how-does-a-spectrophotometer-work\/#Components_of_Spectrophotometer\" >Components of Spectrophotometer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.linquip.com\/blog\/how-does-a-spectrophotometer-work\/#Working_Principles_of_Spectrophotometer\" >Working Principles of Spectrophotometer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.linquip.com\/blog\/how-does-a-spectrophotometer-work\/#Performance_Figures_of_Spectrophotometers\" >Performance Figures of Spectrophotometers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.linquip.com\/blog\/how-does-a-spectrophotometer-work\/#How_Does_a_Spectrophotometer_Work\" >How Does a Spectrophotometer Work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.linquip.com\/blog\/how-does-a-spectrophotometer-work\/#Steps_In_Working_With_a_Spectrophotometer\" >Steps In Working With a Spectrophotometer<\/a><\/li><\/ul><\/nav><\/div>\n<p>A spectrophotometer can be located in many studies, biology, chemistry, and industrial laboratories. The spectrophotometer is utilized for research and data evaluation in different scientific fields. It offers a high degree of precision, sensitivity, and accuracy. In addition, it is inexpensive and applicable to the measurement of a variety of substances. What a spectrophotometer does is transmit and receive light. The spectrophotometer is utilized to evaluate samples of test material by passing light employing the sample and studying the intensity of the wavelengths.<\/p>\n<p>Different samples modify the light in numerous distinct ways and this allows researchers to obtain much more facts about the check content, by viewing the change in light conduct as it passes by way of the sample. If you are eager to know about how does a spectrophotometer works, read this new blog in Linquip to find out more about it.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-5241 size-full\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26.jpg\" alt=\"How Does a Spectrophotometer Work\" width=\"1781\" height=\"1310\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26.jpg 1781w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-300x221.jpg 300w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-1024x753.jpg 1024w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-768x565.jpg 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-1536x1130.jpg 1536w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-696x512.jpg 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-1392x1024.jpg 1392w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-1068x786.jpg 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-571x420.jpg 571w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/Figure10.26-80x60.jpg 80w\" sizes=\"(max-width: 1781px) 100vw, 1781px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Components_of_Spectrophotometer\"><\/span><strong>Components of Spectrophotometer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are different types of spectrophotometer available but all of them has similarity in structure and parts. Before getting to know how a spectrophotometer works, Let us overview the components of this device.<\/p>\n<ul>\n<li><strong>Lamp:<\/strong> light source(s)<\/li>\n<li><strong>Monochromator:<\/strong> a means of isolating a particular wavelength band of the light source, provide Monochromatic light which is light in which all photons have the same wavelength<\/li>\n<li><strong>Cuvette or cell:<\/strong> a sample holder<\/li>\n<li><strong>Detector:<\/strong> a device to measure light intensity<\/li>\n<li><strong>Display:<\/strong> displays both transmittance and absorbance of a sample<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Working_Principles_of_Spectrophotometer\"><\/span><strong>Working Principles of Spectrophotometer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There is an interaction between electromagnetic radiation (light) and matter. A spectrophotometer consists of two instruments, namely a spectrometer for producing light of any selected color (wavelength), and a photometer for measuring the intensity of light. The amount of light passing through the tube is measured by the photometer. The photometer delivers a voltage signal to a display device, The signal changes as the amount of light absorbed by the liquid changes.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-5238\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range.png\" alt=\"Spectrophotometer\" width=\"1534\" height=\"816\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range.png 1534w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-300x160.png 300w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-1024x545.png 1024w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-768x409.png 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-696x370.png 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-1392x740.png 1392w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-1068x568.png 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/17-set-spectrophotometer-spectrum-range-790x420.png 790w\" sizes=\"(max-width: 1534px) 100vw, 1534px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Performance_Figures_of_Spectrophotometers\"><\/span><strong>Performance Figures of Spectrophotometers<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The most important performance characteristics of such instruments are:<\/p>\n<ul>\n<li>The quantities which can be measured (e.g. absorbance only, or absorbance and reflectance)<\/li>\n<li>The accessible spectral range, ideally UV &#8211; VIS &#8211; IR<\/li>\n<li>The spectral resolution (fixed or variable, often limited by a monochromator)<\/li>\n<li>The absorbance range (limited by the light source and the detector sensitivity)<\/li>\n<li>The measurement time for a given spectral range and resolution<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-5240\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer.png\" alt=\"Spectrophotometer\" width=\"1920\" height=\"668\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer.png 1920w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-300x104.png 300w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-1024x356.png 1024w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-768x267.png 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-1536x534.png 1536w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-696x242.png 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-1392x484.png 1392w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-1068x372.png 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/component-of-spectrpophotometer-1207x420.png 1207w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_Does_a_Spectrophotometer_Work\"><\/span><strong>How Does a Spectrophotometer Work?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Here&#8217;s how a spectrophotometer works. A sample solution is placed inside the spectrophotometer. A lamp provides the source of light. The beam of light strikes the diffraction grating, which works like a prism and separates the light into its component wavelengths. An adjustable slit allows only one specific wavelength of light through to the sample solution. Then the light interacts with the sample. The wavelength of light hits the sample, which is held in the cuvette. We need to be careful when handling cuvettes; even a slight fingerprint can interfere with the results. From this point, the detector measures the transmittance and absorbance of the sample.<\/p>\n<p>Transmittance refers to the amount of light that passes completely through the sample and strikes the detector. Absorbance is a measurement of light that is absorbed by the sample. The detector senses the light being transmitted through the sample and converts this information into a digital display on the output screen.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-5242\" src=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2.jpg\" alt=\"Spectrophotometer\" width=\"1280\" height=\"720\" title=\"\" srcset=\"https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2.jpg 1280w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2-300x169.jpg 300w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2-1024x576.jpg 1024w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2-768x432.jpg 768w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2-696x392.jpg 696w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2-1068x601.jpg 1068w, https:\/\/www.linquip.com\/blog\/wp-content\/uploads\/2021\/02\/maxresdefault-2-747x420.jpg 747w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Steps_In_Working_With_a_Spectrophotometer\"><\/span><strong>Steps In Working With a Spectrophotometer<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>When warming up the spectrophotometer, there should be no cuvettes in the machine.<\/li>\n<li>Preparation of samples<\/li>\n<li>A series of standard solutions of known concentration<\/li>\n<li>Set the spectrophotometer to the wavelength of maximum light absorption. Measure light absorbance of standards.<\/li>\n<li>Set the percentage transmittance of light as 0%<\/li>\n<li>In the sample space, lodge a cuvette, filled with solvent and close the sample space.<\/li>\n<li>Set the transmittance at 100%<\/li>\n<li>For comparison, fill the cuvette with the sample and place it in the sample space and close the sample space.<\/li>\n<li>Note down the reading on the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Photometer\" target=\"_blank\" rel=\"noopener\" data-schema-attribute=\"\">Photometer<\/a> for calculations.<\/li>\n<li>Plot standard curve: Absorbance vs. Concentration.<\/li>\n<li>Calculating the concentration of the sample using Beer-Lambert Equation: A = ECL<\/li>\n<\/ul>\n<p>So, there you have every single fact about the spectrophotometer function. If you enjoyed this article in Linquip, let us know by leaving a reply in the comment section. Is there any question we can help you with? Feel free to <a href=\"https:\/\/www.linquip.com\/sign-up?client_redirect=\/\" target=\"_blank\" rel=\"noopener\" data-schema-attribute=\"\">sign up<\/a> on our website to get the most professional advice from our experts.<\/p>\n<h3><b>Buy Equipment or Ask for a Service<\/b><\/h3>\n<p>By using Linquip RFQ Service, you can expect\u00a0to receive quotations from various suppliers across multiple industries and regions.<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"http:\/\/linquip.com\/get-quote?utm_source=blog&amp;utm_medium=content&amp;utm_campaign=product_list&amp;utm_term=product_list&amp;utm_content=rfq\" target=\"_blank\" rel=\"noopener\">Click Here to Request a Quotation From Suppliers and Service Providers<\/a><\/strong><\/p>\n<p><em><strong>Read More In Linquip<\/strong><\/em><\/p>\n<ul>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><a href=\"https:\/\/www.linquip.com\/blog\/a-cheat-sheet-for-types-of-spectrophotometer\/\" target=\"_blank\" rel=\"noopener\">A Cheat Sheet For Types of Spectrophotometers<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><a href=\"https:\/\/www.linquip.com\/blog\/spectrometer-vs-spectrophotometer\/\" target=\"_blank\" rel=\"noopener\">Want To Know Everything About Spectrometers vs Spectrophotometers? Now You Can!<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><a href=\"https:\/\/www.linquip.com\/blog\/beginners-guide-what-is-a-spectrophotometer\/\" target=\"_blank\" rel=\"noopener\">Beginners Guide: What Is a Spectrophotometer<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><a href=\"https:\/\/www.linquip.com\/blog\/difference-between-colorimeter-and-spectrophotometer\/\" target=\"_blank\" rel=\"noopener\">The Difference Between Colorimeter and Spectrophotometer<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><a href=\"https:\/\/www.linquip.com\/blog\/types-of-spectrophotometers\/\" target=\"_blank\" rel=\"noopener\">A Quick Look at Types of Spectrophotometers<\/a><\/span><\/strong><\/span><\/li>\n<li><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><a href=\"https:\/\/www.linquip.com\/blog\/spectrophotometer-vs-colorimeter\/\" target=\"_blank\" rel=\"noopener\">Spectrophotometer VS Colorimeter: Which Do You Need?<\/a><\/span><\/strong><\/span><span style=\"text-decoration: underline;\"><strong><span style=\"font-family: verdana, geneva, sans-serif; font-size: 10pt;\"><br \/>\n<\/span><\/strong><\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A spectrophotometer can be located in many studies, biology, chemistry, and industrial laboratories. The spectrophotometer is utilized for research and data evaluation in different scientific fields. It offers a high degree of precision, sensitivity, and accuracy. In addition, it is inexpensive and applicable to the measurement of a variety of substances. What a spectrophotometer does &#8230;<\/p>\n","protected":false},"author":4,"featured_media":5239,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[21],"tags":[],"class_list":["post-5235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electrical-component"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts\/5235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/comments?post=5235"}],"version-history":[{"count":2,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts\/5235\/revisions"}],"predecessor-version":[{"id":26638,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/posts\/5235\/revisions\/26638"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/media\/5239"}],"wp:attachment":[{"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/media?parent=5235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/categories?post=5235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linquip.com\/blog\/wp-json\/wp\/v2\/tags?post=5235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}