{"id":888,"date":"2020-07-30T17:22:08","date_gmt":"2020-07-30T13:22:08","guid":{"rendered":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/?p=888"},"modified":"2020-07-30T17:22:09","modified_gmt":"2020-07-30T13:22:09","slug":"aqprpf-03-controle-de-lhomogeneite-dune-emulsion","status":"publish","type":"post","link":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/2020\/07\/30\/aqprpf-03-controle-de-lhomogeneite-dune-emulsion\/","title":{"rendered":"AQPrPF 03 : contr\u00f4le de l&rsquo;homog\u00e9n\u00e9it\u00e9 d&rsquo;une \u00e9mulsion"},"content":{"rendered":"\n<p><a href=\"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/files\/2020\/07\/AQPrPF-03-Homogeneite-emulsion.pdf\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ouvrir en PDF.  (opens in a new tab)\">Ouvrir en PDF. <\/a><\/p>\n\n\n\n<p>Une \u00e9mulsion est un m\u00e9lange dispersif microscopique de deux solutions non miscibles. L\u2019homog\u00e9n\u00e9it\u00e9 de ce m\u00e9lange garantie la qualit\u00e9 organoleptique de l\u2019\u00e9mulsion.<\/p>\n\n\n\n<p>Une \u00e9mulsion jug\u00e9e non-homog\u00e8ne est alors non-conforme.<\/p>\n\n\n\n<p><strong>1- Produits test\u00e9s par ce contr\u00f4le&nbsp;:<\/strong><\/p>\n\n\n\n<p>Toutes les \u00e9mulsions&nbsp;: cr\u00e8mes, pommades, mayonnaises, vinaigrettes\u2026\u2026.<\/p>\n\n\n\n<p>Deux&nbsp;&nbsp;contr\u00f4les sont effectu\u00e9s&nbsp;:<\/p>\n\n\n\n<ul><li>Homog\u00e9n\u00e9it\u00e9 macroscopique,<\/li><li>Homog\u00e9n\u00e9it\u00e9 microscopique.<\/li><\/ul>\n\n\n\n<p><strong>2- Contr\u00f4le de l\u2019homog\u00e9n\u00e9it\u00e9 macroscopique.<\/strong><\/p>\n\n\n\n<p><strong>2-1&nbsp;: Mat\u00e9riel n\u00e9cessaire \u00e0 la r\u00e9alisation du contr\u00f4le&nbsp;:<\/strong><\/p>\n\n\n\n<ul><li>Lame de verre,<\/li><li>spatule,<\/li><li>petite quantit\u00e9 de produit \u00e0 tester.<\/li><\/ul>\n\n\n\n<p><strong>2-2&nbsp;: Mode op\u00e9ratoire&nbsp;:<\/strong><\/p>\n\n\n\n<ul><li>Sur une lame de verre, \u00e9taler une mince couche d\u2019\u00e9mulsion \u00e0 tester \u00e0 l\u2019aide de la spatule,<\/li><li>Observer.<\/li><\/ul>\n\n\n\n<p><strong>2-3&nbsp;: Expression et analyse des r\u00e9sultats&nbsp;:<\/strong><\/p>\n\n\n\n<ul><li>Le produit ne contient aucun grumeau, l\u2019\u00e9mulsion est&nbsp;<strong>macroscopiquement homog\u00e8ne<\/strong>.<\/li><li>Le produit contient des grumeaux, l\u2019\u00e9mulsion est&nbsp;<strong>macroscopiquement non-homog\u00e8ne<\/strong>.<\/li><\/ul>\n\n\n\n<p><strong>3- Contr\u00f4le de l\u2019homog\u00e9n\u00e9it\u00e9 microscopique.<\/strong><\/p>\n\n\n\n<p><strong>3-1&nbsp;: Mat\u00e9riel n\u00e9cessaire \u00e0 la r\u00e9alisation du contr\u00f4le&nbsp;:<\/strong><\/p>\n\n\n\n<ul><li>Lame de verre,<\/li><li>Lamelle,<\/li><li>Microscope.<\/li><li>spatule,<\/li><li>petite quantit\u00e9 de produit \u00e0 tester.<\/li><\/ul>\n\n\n\n<p><strong>3-2&nbsp;: Mode op\u00e9ratoire&nbsp;:<\/strong><\/p>\n\n\n\n<ul><li>Sur une lame de verre, \u00e9taler une mince couche d\u2019\u00e9mulsion \u00e0 tester \u00e0 l\u2019aide de la spatule,<\/li><li>Recouvrir d\u2019une lamelle.<\/li><li>Observer \u00e0 l\u2019objectif x 10 puis x 40.<\/li><\/ul>\n\n\n\n<p><strong>3-3&nbsp;: Expression et analyse des r\u00e9sultats&nbsp;:<\/strong><\/p>\n\n\n\n<ul><li>Le produit ne contient aucun grumeau et on constate une bonne dispersion, l\u2019\u00e9mulsion est&nbsp;<strong>microscopiquement homog\u00e8ne<\/strong>.<\/li><li>Le produit contient des grumeaux, et on constate une mauvaise dispersion, l\u2019\u00e9mulsion est&nbsp;<strong>microscopiquement non-homog\u00e8ne<\/strong>.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Ouvrir en PDF. Une \u00e9mulsion est un m\u00e9lange dispersif microscopique de deux solutions non miscibles. L\u2019homog\u00e9n\u00e9it\u00e9 de ce m\u00e9lange garantie la qualit\u00e9 organoleptique de l\u2019\u00e9mulsion. Une \u00e9mulsion jug\u00e9e non-homog\u00e8ne est alors non-conforme. 1- Produits test\u00e9s par ce contr\u00f4le&nbsp;: Toutes les \u00e9mulsions&nbsp;: cr\u00e8mes, pommades, mayonnaises, vinaigrettes\u2026\u2026. Deux&nbsp;&nbsp;contr\u00f4les sont effectu\u00e9s&nbsp;: Homog\u00e9n\u00e9it\u00e9 macroscopique,&#8230; <a class=\"continue-reading-link\" href=\"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/2020\/07\/30\/aqprpf-03-controle-de-lhomogeneite-dune-emulsion\/\"> Continue reading <span class=\"meta-nav\">&rarr; <\/span><\/a><\/p>\n","protected":false},"author":473,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_links_to":"","_links_to_target":""},"categories":[16],"tags":[256,236,253,257],"_links":{"self":[{"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/posts\/888"}],"collection":[{"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/users\/473"}],"replies":[{"embeddable":true,"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/comments?post=888"}],"version-history":[{"count":1,"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/posts\/888\/revisions"}],"predecessor-version":[{"id":889,"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/posts\/888\/revisions\/889"}],"wp:attachment":[{"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/media?parent=888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/categories?post=888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/portail.stpaul4.ac-reunion.fr\/wordpress\/process\/wp-json\/wp\/v2\/tags?post=888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}