{"id":7780,"date":"2024-08-08T13:34:44","date_gmt":"2024-08-08T13:34:44","guid":{"rendered":"https:\/\/longchangextracts.com\/?p=7780"},"modified":"2024-08-08T13:34:44","modified_gmt":"2024-08-08T13:34:44","slug":"acidic-food","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/fr\/acidic-food\/","title":{"rendered":"Quelle est la relation entre les diff\u00e9rentes conversions d'acidit\u00e9 pour les aliments acides tels que les yaourts \u00e0 boire ?"},"content":{"rendered":"<p><strong>Quelle est l'acidit\u00e9 titr\u00e9e d'un yaourt converti \u00e0 90 degr\u00e9s en acide citrique ?<\/strong><\/p>\n<p>Calcul\u00e9 \u00e0 partir des fractions de masse<\/p>\n<p>Acide malique 0,067, acide ac\u00e9tique 0,060, acide tartrique 0,075, acide citrique 0,070 (avec 1 mol\u00e9cule d'eau de cristallisation), acide citrique 0,064, acide lactique 0,090, acide chlorhydrique 0,036, acide phosphorique 0,033.<\/p>\n<p>L'acidit\u00e9 peut \u00e9galement \u00eatre exprim\u00e9e en tant qu'acidit\u00e9 titrable. L'acidit\u00e9 titrable du babeurre est obtenue en augmentant le pH de l'\u00e9chantillon de lait test\u00e9 jusqu'\u00e0 un pH d'environ 8,4 \u00e0 l'aide d'une solution alcaline de concentration connue, g\u00e9n\u00e9ralement avec de la ph\u00e9nolphtal\u00e9ine comme indicateur, qui change de couleur, passant de l'incolore au rose. L'exp\u00e9rience mesure en fait la quantit\u00e9 de base n\u00e9cessaire pour faire passer le pH du lait de vache de 6,6 \u00e0 8,4. Si la croissance bact\u00e9rienne rend le lait acide, la quantit\u00e9 d'alcali consomm\u00e9e dans l'exp\u00e9rience ci-dessus augmente et la valeur d'acidit\u00e9 ou d'acidit\u00e9 titrable du babeurre augmente.<\/p>\n<p>L'acidit\u00e9 peut \u00eatre exprim\u00e9e de plusieurs mani\u00e8res, en fonction de la concentration de NaOH utilis\u00e9e dans l'exp\u00e9rience :<\/p>\n<p>\u00b0SH : c'est-\u00e0-dire le degr\u00e9 de Soxhle Henkle, 100 ml d'\u00e9chantillon de lait sont titr\u00e9s avec 1\/4N NaOH, en utilisant le ph\u00e9nol-phtal\u00e9ine comme indicateur.<\/p>\n<p>La valeur standard est d'environ 7. Cette m\u00e9thode est surtout utilis\u00e9e en Europe.<\/p>\n<p>\u00b0Th : C'est le degr\u00e9 de Thrner. Un \u00e9chantillon de 100 ml de lait, dilu\u00e9 deux fois avec de l'eau distill\u00e9e, est titr\u00e9 avec du NaOH 1\/10 N, en utilisant de la ph\u00e9nolphtal\u00e9ine comme indicateur, et a une valeur standard de 7. Cette m\u00e9thode est principalement utilis\u00e9e en Su\u00e8de.<\/p>\n<p>\u00b0D : degr\u00e9 Dornic. Un \u00e9chantillon de 100 ml de lait est titr\u00e9 avec 1\/9 N NaOH, en utilisant la ph\u00e9nolphtal\u00e9ine comme indicateur, et la valeur standard est de 15. Cette m\u00e9thode est utilis\u00e9e aux Pays-Bas et en France.<\/p>\n<p>%I.a. = c'est-\u00e0-dire l'acidit\u00e9 lactique. Cette m\u00e9thode est largement utilis\u00e9e aux \u00c9tats-Unis d'Am\u00e9rique, au Canada, en Australie et en Nouvelle-Z\u00e9lande.<\/p>","protected":false},"excerpt":{"rendered":"<p>What is the titrated acidity of yogurt 90 degrees converted to citric acid? Calculated from mass fractions Malic acid 0.067, acetic acid 0.060, tartaric acid 0.075, citric acid 0.070 (with 1 molecule of water of crystallization), citric acid 0.064, lactic acid 0.090, hydrochloric acid 0.036, phosphoric acid 0.033 Acidity can also be expressed as titratable [&hellip;]<\/p>","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the relationship between different acidity conversions for acidic foods such as yogurt drinks? - China Chemical Manufacturer<\/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:\/\/longchangextracts.com\/fr\/acidic-food\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the relationship between different acidity conversions for acidic foods such as yogurt drinks? - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"What is the titrated acidity of yogurt 90 degrees converted to citric acid? 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