{"id":4592,"date":"2025-02-19T17:22:00","date_gmt":"2025-02-19T22:22:00","guid":{"rendered":"https:\/\/dev26.lecowebtest.com\/news\/\/"},"modified":"2026-04-27T20:08:27","modified_gmt":"2026-04-28T00:08:27","slug":"protein-analysis-in-dairy-part-1","status":"publish","type":"post","link":"https:\/\/www.leco.com\/fr\/news\/protein-analysis-in-dairy-part-1\/","title":{"rendered":"Analyse des prot\u00e9ines dans les produits laitiers \u00e0 l&#x27;aide de la m\u00e9thode LECO \u2013 1re partie"},"content":{"rendered":"<div class=\"wp-block-group is-style-leco-vertical-margin-top has-global-padding is-layout-constrained wp-container-core-group-is-layout-875e403b wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-1ffe0ea6 wp-block-group-is-layout-flex\">\n<p class=\"wp-block-paragraph\">Publi\u00e9 le<\/p>\n\n\n<div style=\"line-height:1;margin-left:4px;margin-top:13px\" class=\"wp-block-post-date has-custom-1-font-size\"><time datetime=\"2025-02-19T17:22:00-05:00\">19 f\u00e9vrier 2025<\/time><\/div><\/div>\n\n\n\n<h1 class=\"wp-block-heading is-style-h2-style\">Analyse des prot\u00e9ines dans les produits laitiers \u00e0 l&#x27;aide de la m\u00e9thode LECO \u2013 1re partie<\/h1>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\"><figure class=\"is-style-rounded wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1280\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"LECO - News - Protein analysis in milk FP828 - Hero\" style=\"object-fit:cover;\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326.jpg 2560w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326-300x150.jpg 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326-1024x512.jpg 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326-768x384.jpg 768w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326-1536x768.jpg 1536w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326-2048x1024.jpg 2048w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-pt2-hero-032326-18x9.jpg 18w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\"><\/figure><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-1ea9787f wp-block-group-is-layout-constrained\" style=\"margin-top:48px\">\n<div class=\"leco-share-article align-left wp-block-create-block-leco-share-article\">\n\t<div class=\"share-article-wrapper\">\n\t\t<button class=\"share-article-button\" data-url=\"https:\/\/www.leco.com\/fr\/news\/protein-analysis-in-dairy-part-1\/\" aria-label=\"Partager l&#039;article\">\n\t\t\tPartager l'article\t\t<\/button>\n\t\t<span class=\"share-article-copied\" aria-live=\"polite\" aria-atomic=\"true\">\n\t\t\tLien de l'article copi\u00e9\t\t<\/span>\n\t<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">Dumas Combustion Method as Replacement for Kjeldahl\u2014Examples from Milk Analysis<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We are introducing a short series of blog posts to explore the benefits of the Dumas method of protein determination with a focus on milk and milk products. This blog post will address total protein determination, while the second will examine the determination of NPN (non-protein nitrogen) and NCN (non-casein nitrogen).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since the late nineteenth century, the Kjeldahl method of protein determination has been a widely used method for determining Nitrogen\/protein concentration in food samples. Despite its disadvantages, (long analysis times, high costs, safety issues, and recovery concerns) it remained the standard in food laboratories until the early 1990s. Since then, the Dumas combustion method has regained relevance in the field. Numerous comparison tests have shown that the results are comparable in terms of accuracy and precision.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At LECO, we produce Dumas instruments, which employ the Ballast-Aliquot method. The sample is combusted in pure oxygen, with all combustion gases collected in a ballast volume. An aliquot of 3 to 10cm is pushed through the system by an inert carrier gas (Ar or He) and analyzed by a thermal-conductivity detector (TCD). This method provides the following benefits:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High throughput with an analysis cycle time of 2.8 minutes for the FP828 model<\/li>\n\n\n\n<li>Simple method with linear calibration, applicable to nearly all food samples without requiring specific information about the sample<\/li>\n\n\n\n<li>Solid and liquid samples analyzed with the same setup, removing the need for a liquid sampler or mixing milk with absorbent material<\/li>\n\n\n\n<li>Macro capabilities, allowing for the analysis of up to 1 g of milk (FP828) or more than 1 g for the FP928 model<\/li>\n\n\n\n<li>High instrument uptime, no need for oxidizing reagents, and low costs per analysis due to the ballast aliquot principle<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-image size-full is-resized is-style-rounded-full-width\"><img loading=\"lazy\" decoding=\"async\" width=\"559\" height=\"750\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-analyzer-032326.jpg\" alt=\"LECO - News - Protein analysis in milk - Part 1 - FP828 analyzer\" class=\"wp-image-4121\" style=\"width:786px;height:auto\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-analyzer-032326.jpg 559w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-analyzer-032326-224x300.jpg 224w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-analyzer-032326-9x12.jpg 9w\" sizes=\"auto, (max-width: 559px) 100vw, 559px\" \/><\/figure>\n<\/div>\n\n\n\n<p class=\"has-text-align-center is-style-caption-body-style wp-block-paragraph\"><em>LECO FP828 Protein Analyzer<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A recent comparison study of Kjeldahl and Dumas techniques for solid and liquid dairy samples, organized by a large dairy products producer in France, showed a high degree of agreement with a precision better than 1% RSD.<\/p>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-table is-style-regular\"><table class=\"has-fixed-layout\"><thead><tr><th>Kjeldahl<\/th><th>Dumas<\/th><th>Matrix<\/th><\/tr><\/thead><tbody><tr><td><strong>Lab Average<\/strong><\/td><td><strong>FP 828 P<\/strong><\/td><td><\/td><\/tr><tr><td>3,59%<\/td><td>3,61%<\/td><td>Milk A<\/td><\/tr><tr><td>3,37%<\/td><td>3,36%<\/td><td>Milk B<\/td><\/tr><tr><td>2,71%<\/td><td>2,72%<\/td><td>Buttermilk<\/td><\/tr><tr><td>1,79%<\/td><td>1,81%<\/td><td>Cream<\/td><\/tr><tr><td>3,67%<\/td><td>3,58%<\/td><td>Raw Milk<\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The Kjeldahl and Dumas techniques showed excellent correlation (R\u00b2 &gt; 0.997) for total Nitrogen in cheese and milk powders.<\/p>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-image size-full is-resized is-style-rounded-full-width\"><img loading=\"lazy\" decoding=\"async\" width=\"1888\" height=\"1003\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326.png\" alt=\"LECO - News - Protein analysis in milk FP828 Part 1 - Total Nitrogen table\" class=\"wp-image-4123\" style=\"width:786px;height:auto\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326.png 1888w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326-300x159.png 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326-1024x544.png 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326-768x408.png 768w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326-1536x816.png 1536w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/04\/leco-news-protein-analysis-in-milk-fp828-pt1-total-nitrogen-table-032326-18x10.png 18w\" sizes=\"auto, (max-width: 1888px) 100vw, 1888px\" \/><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">In conclusion, the LECO 828 instrument series of protein analyzers using the Dumas method delivers accurate results comparable to the Kjeldahl method in analyzing Emmental Cheese and milk powders. The Dumas method offers advantages such as faster speed, lower cost per analysis, improved safety for the environment and technicians, and efficient automation.<\/p>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">En savoir plus<\/h2>\n\n\n<div class=\"leco-event-rows wp-block-create-block-leco-event-rows\">\n\t\t<div class=\"leco-event-rows__row\">\n\t\t<div class=\"leco-event-rows__split\">\n\n\t\t\t<!-- Left: Featured image -->\n\t\t\t<div class=\"leco-event-rows__image-col\">\n\t\t\t\t<figure class=\"wp-block-image size-full is-style-rounded-full-width\">\n\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2019\/11\/spilled-milk-1024x576.jpg\" alt=\"Du lait se r\u00e9pand dans et autour du verre\" style=\"aspect-ratio:4\/3;object-fit:cover\">\n\t\t\t\t<\/figure>\n\t\t\t<\/div>\n\n\t\t\t<!-- Right: Content -->\n\t\t\t<div class=\"leco-event-rows__content-col\">\n\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"leco-event-rows__excerpt\">\n\t\t\t\t\t\tTo learn more about the FP828 and the benefits of the Dumas method when it comes to protein determination, consider attending our upcoming webinar, \u201cProtein Determination in Food with Focus on Dairy Samples with LECO.\u201d\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"leco-event-rows__date\">\n\t\t\t\t\t\tOn Demand\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t\t<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n\t\t\t\t\t<div class=\"wp-block-button\">\n\t\t\t\t\t\t<a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.leco.com\/fr\/events\/webinar\/protein-determination-in-food-with-focus-on-dairy-samples\/\">\n\t\t\t\t\t\t\tS'inscrire au webinaire\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n\t<\/div>\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">Instruments utilis\u00e9s<\/h2>\n\n\n\n<div class=\"leco-card-grid-block wp-block-create-block-leco-card-grid\">\n\t<div class=\"leco-card-grid columns-2\" role=\"list\" aria-label=\"Card grid\">\n\t\t\n\t\t\t\t\t<a href=\"https:\/\/www.leco.com\/fr\/instrument\/analyseurs-elementaires-organiques\/\" class=\"leco-card\" role=\"listitem\" aria-label=\"828\/928 Series - Click to learn more\">\n\t\t\n\t\t\t<!-- Card Image -->\n\t\t\t<div class=\"leco-card-image\" role=\"img\" aria-label=\"Technicien de laboratoire utilisant l&#x27;analyseur de carbone et d&#x27;azote LECO s\u00e9rie 928\">\n\t\t\t\t\t\t\t\t\t<img src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/03\/leco-cn928-elemental-analyzer.jpg\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/03\/leco-cn928-elemental-analyzer-1024x576.jpg 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/03\/leco-cn928-elemental-analyzer-768x432.jpg 768w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/03\/leco-cn928-elemental-analyzer-300x169.jpg 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/03\/leco-cn928-elemental-analyzer.jpg 1280w\" sizes=\"(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 371px\" alt=\"Technicien de laboratoire utilisant l&#x27;analyseur de carbone et d&#x27;azote LECO s\u00e9rie 928\" class=\"leco-card-img\" loading=\"lazy\" decoding=\"sync\">\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<!-- Card Content -->\n\t\t\t<div class=\"leco-card-content\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"leco-card-title\">\n\t\t\t\t\t\tS\u00e9rie 828\/928\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t<div class=\"leco-card-bottom\">\n\t\t\t\t\t\t\t\t\t\t\t<p class=\"leco-card-description\">\n\t\t\t\t\t\t\tAnalyse de carbone, d'hydrog\u00e8ne, d'azote, de soufre et de prot\u00e9ines des mati\u00e8res organiques\t\t\t\t\t\t<\/p>\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"leco-card-link\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t<svg class=\"leco-card-arrow\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"44\" height=\"44\" viewbox=\"0 0 44 44\" fill=\"none\" focusable=\"false\">\n\t\t\t\t\t\t\t\t<path d=\"M12.7998 22C12.7998 22.5523 13.2475 23 13.7998 23L27.3857 23L21.7998 28.5859C21.4093 28.9764 21.4093 29.6095 21.7998 30C22.1903 30.3905 22.8234 30.3905 23.2139 30L30.5068 22.7071C30.8973 22.3166 30.8973 21.6834 30.5068 21.2929L23.2139 14C22.8234 13.6095 22.1903 13.6095 21.7998 14C21.4093 14.3905 21.4093 15.0236 21.7998 15.4141L27.3857 21L13.7998 21C13.2475 21 12.7998 21.4477 12.7998 22Z\" fill=\"#78543D\"><\/path>\n\t\t\t\t\t\t\t<\/svg>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t\t\t<\/a>\n\t\t\n\t\t\t<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<p class=\"is-style-default has-small-font-size wp-block-paragraph\"><strong>Notes d'application<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.leco.com\/fr\/documents\/203-821-674\/\" data-type=\"document\" data-id=\"1081\">Determination of Nitrogen and Protein in Cheese (FP828)<\/a> \u2013 For further evidence of the capabilities of the FP828 protein analyzers, check out this application note on determining Nitrogen\/protein in cheese.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-style-full-bleed has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">Nouvelles connexes<\/h2>\n\n\n\n<div class=\"wp-block-query is-layout-flow wp-block-query-is-layout-flow\"><ul class=\"columns-3 wp-block-post-template is-layout-grid wp-container-core-post-template-is-layout-1d17308c wp-block-post-template-is-layout-grid\"><li class=\"wp-block-post post-7201 post type-post status-publish format-standard has-post-thumbnail hentry category-news tag-gcxgc tag-microplastics tag-pyrolysis tag-thermal-desorption instrument-model-hrt4d core-analysis-type-gc-mass-spectrometry application-type-environmental product-line-mass-spectrometry\">\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><figure style=\"aspect-ratio:16\/9\" class=\"is-style-rounded wp-block-post-featured-image\"><a href=\"https:\/\/www.leco.com\/fr\/news\/microplastic-analysis-methods-with-thermal-desorption-and-pyrolysis-gcxgc-tofms\/\" target=\"_self\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"600\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Surpassing the Limits of Traditional Microplastic Analysis Methods with Thermal Desorption and Pyrolysis GCxGC-TOFMS\" style=\"width:100%;height:100%;object-fit:cover;\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics.png 1800w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics-300x100.png 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics-1024x341.png 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics-768x256.png 768w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics-1536x512.png 1536w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/09\/Featured-Blog-Image-Microplastics-18x6.png 18w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\"><\/a><\/figure>\n\n<h3 style=\"font-style:normal;font-weight:300\" class=\"has-link-color wp-elements-a886519ae13d3c55929ef374b8bceb2d wp-block-post-title has-text-color has-dm-8-color has-medium-font-size has-rothek-font-family\"><a href=\"https:\/\/www.leco.com\/fr\/news\/microplastic-analysis-methods-with-thermal-desorption-and-pyrolysis-gcxgc-tofms\/\" target=\"_self\">Surpassing the Limits of Traditional Microplastic Analysis Methods with Thermal Desorption and Pyrolysis GCxGC-TOFMS<\/a><\/h3>\n\n<div class=\"wp-block-post-date\"><time datetime=\"2026-09-01T14:06:38-04:00\">1 septembre 2026<\/time><\/div><\/div>\n\n<\/li><li class=\"wp-block-post post-4219 post type-post status-publish format-standard has-post-thumbnail hentry category-news instrument-model-58 core-analysis-type-carbon application-type-environmental application-type-soil-analysis product-line-elemental-analysis\">\n\n<div class=\"wp-block-group is-layout-flow 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class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><figure style=\"aspect-ratio:16\/9\" class=\"is-style-rounded wp-block-post-featured-image\"><a href=\"https:\/\/www.leco.com\/fr\/news\/thank-you-2026-summer-interns\/\" target=\"_self\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"660\" src=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026.jpg\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Merci, les stagiaires d&#039;\u00e9t\u00e9 2026 !\" style=\"width:100%;height:100%;object-fit:cover;\" srcset=\"https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026.jpg 1800w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026-300x110.jpg 300w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026-1024x375.jpg 1024w, https:\/\/www.leco.com\/wp-content\/uploads\/2026\/07\/Intern-Day-Photo-2026-768x282.jpg 768w, 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introducing a short series of blog posts to explore the benefits of the Dumas method of protein determination with a focus on milk and milk products. This blog post will address [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":4122,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"instrument-model":[57],"core-analysis-type":[23],"application-type":[35],"product-line":[14],"class_list":["post-4592","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","instrument-model-57","core-analysis-type-nitrogen","application-type-protein-analysis","product-line-elemental-analysis"],"_links":{"self":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts\/4592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/comments?post=4592"}],"version-history":[{"count":0,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/posts\/4592\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/media\/4122"}],"wp:attachment":[{"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/media?parent=4592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/categories?post=4592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/tags?post=4592"},{"taxonomy":"instrument-model","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/instrument-model?post=4592"},{"taxonomy":"core-analysis-type","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/core-analysis-type?post=4592"},{"taxonomy":"application-type","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/application-type?post=4592"},{"taxonomy":"product-line","embeddable":true,"href":"https:\/\/www.leco.com\/fr\/wp-json\/wp\/v2\/product-line?post=4592"}],"curies":[{"name":"Bien jou\u00e9","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}