{"id":10638,"date":"2021-06-07T11:34:10","date_gmt":"2021-06-07T09:34:10","guid":{"rendered":"https:\/\/consilab.de\/?page_id=10638"},"modified":"2022-07-11T18:42:14","modified_gmt":"2022-07-11T16:42:14","slug":"methodes-permettant-de-determiner-les-proprietes-physico-chimiques-a-21-proprietes-comburantes-substances-liquides","status":"publish","type":"page","link":"https:\/\/consilab.de\/fr\/prestations\/dispositif-de-controle-des-bonnes-pratiques-de-laboratoire\/methodes-permettant-de-determiner-les-proprietes-physico-chimiques-a-21-proprietes-comburantes-substances-liquides\/","title":{"rendered":"M\u00e9thodes permettant de d\u00e9terminer les propri\u00e9t\u00e9s physico-chimiques, A.21. Propri\u00e9t\u00e9s comburantes (substances liquides)"},"content":{"rendered":"<p>[vc_row rt_row_background_width=\u00a0\u00bbfullwidth\u00a0\u00bb rt_row_content_width=\u00a0\u00bbdefault\u00a0\u00bb rt_row_style=\u00a0\u00bbdefault-style\u00a0\u00bb rt_row_borders=\u00a0\u00bb\u00a0\u00bb rt_row_shadows=\u00a0\u00bb\u00a0\u00bb rt_row_paddings=\u00a0\u00bbfalse\u00a0\u00bb rt_bg_effect=\u00a0\u00bbclassic\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbcover\u00a0\u00bb rt_bg_position=\u00a0\u00bbright top\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb rt_bg_video_format=\u00a0\u00bbself-hosted\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3&Prime; rt_column_shadow=\u00a0\u00bb\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbauto auto\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb class=\u00a0\u00bbdownload\u00a0\u00bb rt_bg_color=\u00a0\u00bb\u00a0\u00bb rt_bg_overlay_color=\u00a0\u00bb\u00a0\u00bb offset=\u00a0\u00bbvc_hidden-sm vc_hidden-xs\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1532424200870{padding-bottom: 0px !important;}\u00a0\u00bb rt_padding_bottom=\u00a0\u00bb0&Prime;][vc_widget_sidebar sidebar_id=\u00a0\u00bbrt-theme-20-common-sidebar\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb2\/3&Prime; rt_column_shadow=\u00a0\u00bb\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbauto auto\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb class=\u00a0\u00bbmaincontent\u00a0\u00bb rt_bg_color=\u00a0\u00bb\u00a0\u00bb rt_bg_overlay_color=\u00a0\u00bb\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1532424195693{margin-bottom: 1em !important;padding-bottom: 2em !important;}\u00a0\u00bb][vc_column_text el_class=\u00a0\u00bbredborderleft\u00a0\u00bb]<\/p>\n<h1>Essai conform\u00e9ment au r\u00e8glement CE A.21. (R\u00e8glement (CE) N\u00b0 440\/2008 &#8211; Annexe \u00ab\u00a0Partie A : M\u00e9thodes permettant de d\u00e9terminer les propri\u00e9t\u00e9s physico-chimiques, A.21. Propri\u00e9t\u00e9s comburantes (substances liquides))<\/h1>\n<h2>Les liquides oxydants sont des mati\u00e8res ou des m\u00e9langes liquides, qui sans \u00eatre n\u00e9cessairement combustibles en soi, sont toutefois g\u00e9n\u00e9ralement susceptibles de provoquer ou de favoriser l\u2019incendie d\u2019autres mati\u00e8res en lib\u00e9rant de l\u2019oxyg\u00e8ne.<\/h2>\n<p>Le pr\u00e9sent test est destin\u00e9 \u00e0 d\u00e9terminer les propri\u00e9t\u00e9s comburantes des mati\u00e8res et m\u00e9langes liquides, comme crit\u00e8re permettant de les \u00e9valuer du point de vue de la s\u00e9curit\u00e9, voire de les r\u00e9partir en classes de danger et en groupes d\u2019emballage dans le cadre des r\u00e8glements pertinents, notamment en vertu du R\u00e8glement (CE) n\u00b0440\/2008, annexe \u00ab\u00a0Partie A\u00a0: M\u00e9thodes permettant de d\u00e9terminer les propri\u00e9t\u00e9s physico-chimiques, A.21. Propri\u00e9t\u00e9s comburantes (substances liquides) \u00bb<\/p>\n<p>Les \u00e9chantillons \u00e0 tester et les \u00e9chantillons de r\u00e9f\u00e9rence sont m\u00e9lang\u00e9s dans un rapport massique de 1 pour 1 avec une substance combustible d\u00e9finie (cellulose). Le m\u00e9lange est plac\u00e9 dans un r\u00e9cipient sous pression (bombe) dont l\u2019extr\u00e9mit\u00e9 inf\u00e9rieure est \u00e9quip\u00e9e d\u2019un filament de chauffage. La bombe est ensuite obtur\u00e9e en son extr\u00e9mit\u00e9 sup\u00e9rieure par un disque de rupture. Puis le filament de chauffage est activ\u00e9 et on enregistre le profil temps\/pression par un syst\u00e8me de mesure. On note le temps n\u00e9cessaire pour que la pression monte de 690 kPa \u00e0 2.070 kPa au-dessus de la pression atmosph\u00e9rique.<\/p>\n<p>On calcule les temps moyens de mont\u00e9e en pression \u00e0 la fois pour la substance \u00e0 tester et pour la substance de r\u00e9f\u00e9rence.<\/p>\n<p>Pour l\u2019\u00e9valuation des r\u00e9sultats de l\u2019essai, on se fonde sur ce qui suit\u00a0:<\/p>\n<ul>\n<li>sur le fait que le m\u00e9lange de la substance \u00e0 tester et de cellulose s\u2019enflamme spontan\u00e9ment ou non.<\/li>\n<li>sur la comparaison du temps moyen de mont\u00e9e en pression de 690\u00a0kPa \u00e0 2.070\u00a0kPa avec le temps moyen obtenu pour les substances de r\u00e9f\u00e9rence.<\/li>\n<\/ul>\n<p>La substance liquide \u00e0 tester doit \u00eatre consid\u00e9r\u00e9e comme comburante lorsque :<\/p>\n<ul>\n<li>un m\u00e9lange dans un rapport massique de 1 pour 1 de la substance et de cellulose s\u2019enflamme spontan\u00e9ment, ou<\/li>\n<li>lorsque un m\u00e9lange dans un rapport massique de 1 pour 1 de la substance et de cellulose pr\u00e9sente un temps moyen de mont\u00e9e en pression inf\u00e9rieur ou \u00e9gal au temps moyen de mont\u00e9e en pression d\u2019un m\u00e9lange 1 pour 1 en poids d\u2019une solution aqueuse d\u2019acide nitrique \u00e0 65% (poids\/poids) et de cellulose.<\/li>\n<\/ul>\n<div id=\"attachment_10715\" style=\"width: 492px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-10715\" class=\"size-full wp-image-10715\" src=\"https:\/\/consilab.de\/wp-content\/uploads\/2021\/06\/Structure-de-lessai-pour-le-test-conforme\u0301ment-au-re\u0300glement-CE-A.21..jpg\" alt=\"Structure de l\u2019essai pour le test conforme\u0301ment au re\u0300glement CE A.21.\" width=\"482\" height=\"262\" srcset=\"https:\/\/consilab.de\/wp-content\/uploads\/2021\/06\/Structure-de-lessai-pour-le-test-conforme\u0301ment-au-re\u0300glement-CE-A.21..jpg 482w, https:\/\/consilab.de\/wp-content\/uploads\/2021\/06\/Structure-de-lessai-pour-le-test-conforme\u0301ment-au-re\u0300glement-CE-A.21.-350x190.jpg 350w\" sizes=\"auto, (max-width: 482px) 100vw, 482px\" \/><p id=\"caption-attachment-10715\" class=\"wp-caption-text\">Figure: Structure de l\u2019essai pour le test conforme\u0301ment au re\u0300glement CE A.21.<\/p><\/div>\n<p>[\/vc_column_text][vc_row_inner rt_row_style=\u00a0\u00bbglobal-style\u00a0\u00bb rt_bg_custom_alignment=\u00a0\u00bbtop\u00a0\u00bb][vc_column_inner width=\u00a0\u00bb2\/3&Prime; rt_column_shadow=\u00a0\u00bb\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbauto auto\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb][vc_btn title=\u00a0\u00bbDispositif de contr\u00f4le des bonnes pratiques de laboratoire\u00a0\u00bb style=\u00a0\u00bbclassic\u00a0\u00bb color=\u00a0\u00bbpurple\u00a0\u00bb i_icon_fontawesome=\u00a0\u00bbfas fa-angle-left\u00a0\u00bb add_icon=\u00a0\u00bbtrue\u00a0\u00bb link=\u00a0\u00bburl:%2Ffr%2Fprestations%2Fdispositif-de-controle-des-bonnes-pratiques-de-laboratoire%2F|title:Dispositif%20de%20contr%C3%B4le%20des%20bonnes%20pratiques%20de%20laboratoire\u00a0\u00bb el_class=\u00a0\u00bbbtn&#8211;red\u00a0\u00bb][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb1\/3&Prime; rt_column_shadow=\u00a0\u00bb\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbauto auto\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb][vc_btn title=\u00a0\u00bbPrestations\u00a0\u00bb style=\u00a0\u00bbclassic\u00a0\u00bb color=\u00a0\u00bbpurple\u00a0\u00bb i_icon_fontawesome=\u00a0\u00bbfas fa-angle-left\u00a0\u00bb add_icon=\u00a0\u00bbtrue\u00a0\u00bb link=\u00a0\u00bburl:%2Ffr%2Fprestations%2F|title:Prestations\u00a0\u00bb el_class=\u00a0\u00bbbtn&#8211;red\u00a0\u00bb][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row rt_row_background_width=\u00a0\u00bbfullwidth\u00a0\u00bb rt_row_content_width=\u00a0\u00bbdefault\u00a0\u00bb rt_row_style=\u00a0\u00bbdefault-style\u00a0\u00bb rt_row_borders=\u00a0\u00bb\u00a0\u00bb rt_row_shadows=\u00a0\u00bb\u00a0\u00bb rt_row_paddings=\u00a0\u00bbfalse\u00a0\u00bb rt_bg_effect=\u00a0\u00bbclassic\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbcover\u00a0\u00bb rt_bg_position=\u00a0\u00bbright top\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb rt_bg_video_format=\u00a0\u00bbself-hosted\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/3&Prime; rt_column_shadow=\u00a0\u00bb\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbauto auto\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb class=\u00a0\u00bbdownload\u00a0\u00bb rt_bg_color=\u00a0\u00bb\u00a0\u00bb rt_bg_overlay_color=\u00a0\u00bb\u00a0\u00bb offset=\u00a0\u00bbvc_hidden-sm vc_hidden-xs\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1532424200870{padding-bottom: 0px !important;}\u00a0\u00bb rt_padding_bottom=\u00a0\u00bb0&Prime;][vc_widget_sidebar sidebar_id=\u00a0\u00bbrt-theme-20-common-sidebar\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb2\/3&Prime; rt_column_shadow=\u00a0\u00bb\u00a0\u00bb rt_bg_image_repeat=\u00a0\u00bbrepeat\u00a0\u00bb rt_bg_size=\u00a0\u00bbauto auto\u00a0\u00bb rt_bg_attachment=\u00a0\u00bbscroll\u00a0\u00bb class=\u00a0\u00bbmaincontent\u00a0\u00bb rt_bg_color=\u00a0\u00bb\u00a0\u00bb rt_bg_overlay_color=\u00a0\u00bb\u00a0\u00bb css=\u00a0\u00bb.vc_custom_1532424195693{margin-bottom: 1em !important;padding-bottom: 2em !important;}\u00a0\u00bb][vc_column_text el_class=\u00a0\u00bbredborderleft\u00a0\u00bb] Essai conform\u00e9ment au r\u00e8glement CE A.21. (R\u00e8glement (CE) N\u00b0 440\/2008  &#8230;<br \/><a class=\"more-link\" href=\"https:\/\/consilab.de\/fr\/prestations\/dispositif-de-controle-des-bonnes-pratiques-de-laboratoire\/methodes-permettant-de-determiner-les-proprietes-physico-chimiques-a-21-proprietes-comburantes-substances-liquides\/\">more | mehr<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":9331,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-10638","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/pages\/10638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/comments?post=10638"}],"version-history":[{"count":1,"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/pages\/10638\/revisions"}],"predecessor-version":[{"id":12193,"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/pages\/10638\/revisions\/12193"}],"up":[{"embeddable":true,"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/pages\/9331"}],"wp:attachment":[{"href":"https:\/\/consilab.de\/fr\/wp-json\/wp\/v2\/media?parent=10638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}