{"id":1761,"date":"2025-12-11T16:37:48","date_gmt":"2025-12-11T15:37:48","guid":{"rendered":"https:\/\/bioeducator.eu\/?page_id=1761"},"modified":"2025-12-11T16:40:18","modified_gmt":"2025-12-11T15:40:18","slug":"bufor-fosforanowy","status":"publish","type":"page","link":"https:\/\/bioeducator.eu\/?page_id=1761","title":{"rendered":"Bufor fosforanowy"},"content":{"rendered":"\n<p>Bufor fosforanowy jest bardzo cz\u0119sto wykorzystywany w laboratorium. Jego zastosowania s\u0105 szerokie od bada\u0144 enzymatycznych po histologi\u0119. Wsz\u0119dzie tam, gdzie niezb\u0119dne jest zachowanie oboj\u0119tnego pH i przy zmiennych warunkach, bufor fosforanowy sprawdzi si\u0119 doskonale. Du\u017c\u0105 zalet\u0105 jest r\u00f3wnie\u017c mo\u017cliwo\u015b\u0107 sterowania pH buforu i dopasowania go do swoich specyficznych cel\u00f3w (np. optymalnemu pH dla dzia\u0142ania konkretnych enzym\u00f3w).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Z czego sk\u0142ada si\u0119 bufor fosforanowy?<\/h2>\n\n\n\n<p>Istniej\u0105 dwa rodzaju buforu fosforanowego. Pierwszy oparty jest o sole sodu, drugi o sole potasu. W obu buforach s\u0105 to sole kwasu diwodorofosforowego i wodorofosforowego.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Bufor sodowo fosforanowy<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Bufor potasowo fosforanowy<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Diwodorofosforan (V) sodu <br>Wodorofosforan (V) sodu <br>pH 5,7 \u2013 8,0<\/td><td class=\"has-text-align-center\" data-align=\"center\">Diwodorofosforan (V) potasu <br>Wodorofosforan (V) potasu <br>pH 5,8 \u2013 8,0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Oba bufory posiadaj\u0105 podobn\u0105 obj\u0119to\u015b\u0107 buforow\u0105, jednak ich unikalne w\u0142a\u015bciwo\u015bci mog\u0105 wp\u0142ywa\u0107 na ich zastosowanie.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kt\u00f3ry bufor fosforanowy wybra\u0107?<\/h2>\n\n\n\n<p>Zar\u00f3wno bufor sodowo fosforowy jak i potasowo fosforowy maj\u0105 podobne mo\u017cliwo\u015bci utrzymywania pH. W niekt\u00f3rych specyficznych warunkach ich r\u00f3\u017cne w\u0142a\u015bciwo\u015bci mog\u0105 istotnie wp\u0142yn\u0105\u0107 na wynik badania lub stabilno\u015b\u0107 uk\u0142adu.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>W\u0142a\u015bciwo\u015b\u0107<\/strong><\/td><td><strong>Bufor sodowo fosforowy<\/strong><\/td><td><strong>Bufor potasowo fosforowy<\/strong><\/td><\/tr><tr><td><strong>Rozpuszczalno\u015b\u0107<\/strong><\/td><td>W niskich temperaturach I podczas zamra\u017cania mo\u017ce si\u0119 wytr\u0105ca\u0107, powoduj\u0105c zm\u0119tnienie i powstawanie agregat\u00f3w.<\/td><td>Lepsza rozpuszczalno\u015b\u0107 w niskich temperaturach. Nie powoduje zm\u0119tnienia i wytr\u0105cania w trakcie zamra\u017cania.<\/td><\/tr><tr><td><strong>Interakcja z SDS<\/strong><\/td><td>Nie reaguje z SDS<\/td><td>Jony potasu wchodz\u0105 w reakcje z SDS prowadz\u0105c do wytr\u0105cania. Wiele os\u00f3b zaleca unikanie tego buforu w <a href=\"https:\/\/bioeducator.eu\/?page_id=1712\">SDS-PAGE<\/a>.<\/td><\/tr><tr><td><strong>Zakres pH<\/strong><\/td><td>Skuteczne buforowanie w zakresie pH 5,7 \u2013 8,0. Najwi\u0119ksza zdolno\u015b\u0107 w pH 6,8.<\/td><td>Skuteczne buforowanie w zakresie pH 5,8 \u2013 8,0. Najwi\u0119ksza zdolno\u015b\u0107 w pH 6,8.<\/td><\/tr><tr><td><strong>Ruchliwo\u015b\u0107 (CZE)<\/strong><\/td><td>Mo\u017ce powodowa\u0107 szybsz\u0105 migracj\u0119 cz\u0105steczek<\/td><td>Wolniejsza migracja<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Jak przygotowa\u0107 bufor sodowo fosforanowy?<\/h2>\n\n\n\n<p>Aby przygotowa\u0107 0,1 M bufor sodowo fosforanowy musisz przygotowa\u0107 najpierw 0,2 M roztwory diwodorofsforanu (V) sodu i wodorofsforanu (V) sodu.<\/p>\n\n\n\n<p><strong>Roztw\u00f3r A (0,2 M diwodorosforan sodu, NaH<sub>2<\/sub>PO<sub>4<\/sub>)<\/strong><\/p>\n\n\n\n<p>27,8 g NaH<sub>2<\/sub>PO<sub>4<\/sub> rozpu\u015b\u0107 w 800 ml wody, przenie\u015b ilo\u015bciowo do kolby miarowej o obj\u0119to\u015bci 1000 ml i uzupe\u0142nij do kreski.<\/p>\n\n\n\n<p><strong>Roztw\u00f3r B (0,2 M wodorofosforan sodu, Na<sub>2<\/sub>HPO<sub>4<\/sub>)<\/strong><\/p>\n\n\n\n<p>53,65 g Na<sub>2<\/sub>HPO<sub>4<\/sub> &nbsp;x 7 H<sub>2<\/sub>O lub 71,7 g Na<sub>2<\/sub>HPO<sub>4<\/sub> &nbsp;x 12 H<sub>2<\/sub>O rozpu\u015b\u0107 w 800 ml wody. Przenie\u015b do kolby miarowej o obj\u0119to\u015bci 1000 ml i uzupe\u0142nij do kreski.<\/p>\n\n\n\n<p>By otrzyma\u0107 bufor o w\u0142a\u015bciwym pH, zmieszaj roztwory A i B zgodnie z poni\u017csz\u0105 tabel\u0105 i uzupe\u0142nij wod\u0105 do obj\u0119to\u015bci ko\u0144cowej 200 ml.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>pH<\/td><td>ml roztworu A (0,2 M NaH2PO4)<\/td><td>Ml buforu B (0,2 M Na2HPO4)<\/td><\/tr><tr><td>5,7<\/td><td>93,5<\/td><td>6,5<\/td><\/tr><tr><td>5,8<\/td><td>92,0<\/td><td>8,0<\/td><\/tr><tr><td>5,9<\/td><td>90,0<\/td><td>10,0<\/td><\/tr><tr><td>6,0<\/td><td>87,7<\/td><td>12,3<\/td><\/tr><tr><td>6,1<\/td><td>85,0<\/td><td>15,0<\/td><\/tr><tr><td>6,2<\/td><td>81,5<\/td><td>18,5<\/td><\/tr><tr><td>6,3<\/td><td>77,5<\/td><td>22,5<\/td><\/tr><tr><td>6,4<\/td><td>73,5<\/td><td>26,5<\/td><\/tr><tr><td>6,5<\/td><td>68,5<\/td><td>31,5<\/td><\/tr><tr><td>6,6<\/td><td>62,5<\/td><td>37,5<\/td><\/tr><tr><td>6,7<\/td><td>56,5<\/td><td>43,5<\/td><\/tr><tr><td>6,8<\/td><td>51,0<\/td><td>49,0<\/td><\/tr><tr><td>6,9<\/td><td>45,0<\/td><td>55,0<\/td><\/tr><tr><td>7,0<\/td><td>39,0<\/td><td>61,0<\/td><\/tr><tr><td>7,1<\/td><td>33,0<\/td><td>67,0<\/td><\/tr><tr><td>7,2<\/td><td>28,0<\/td><td>72,0<\/td><\/tr><tr><td>7,3<\/td><td>23,0<\/td><td>77,0<\/td><\/tr><tr><td>7,4<\/td><td>19,0<\/td><td>81,0<\/td><\/tr><tr><td>7,5<\/td><td>16,0<\/td><td>84,0<\/td><\/tr><tr><td>7,6<\/td><td>13,0<\/td><td>87,0<\/td><\/tr><tr><td>7,7<\/td><td>10,5<\/td><td>90,5<\/td><\/tr><tr><td>7,8<\/td><td>8,5<\/td><td>91,5<\/td><\/tr><tr><td>7,9<\/td><td>7,0<\/td><td>93,0<\/td><\/tr><tr><td>8,0<\/td><td>5,3<\/td><td>94,7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Zalecam przygotowywanie buforu na \u015bwie\u017co i zu\u017cycie go w przeci\u0105gu 2 tygodni. Roztwory A i B mo\u017cna przechowywa\u0107 d\u0142u\u017cej i u\u017cywa\u0107 ich jako wyj\u015bciowych do przygotowania buforu roboczego.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak przygotowa\u0107 bufor potasowo fosforowy?<\/h2>\n\n\n\n<p>Aby przygotowa\u0107 0,1 M bufor potasowo fosforanowy musisz przygotowa\u0107 najpierw 0,2 M roztwory diwodorofosforanu (V) potasu i wodorofosforanu (V) potasu.<\/p>\n\n\n\n<p><strong>Roztw\u00f3r A (0,2 M diwodorosforan potasu, KH<sub>2<\/sub>PO<sub>4<\/sub>)<\/strong><\/p>\n\n\n\n<p>34,84 g KH<sub>2<\/sub>PO<sub>4<\/sub> rozpu\u015b\u0107 w 800 ml wody, przenie\u015b ilo\u015bciowo do kolby miarowej o obj\u0119to\u015bci 1000 ml i uzupe\u0142nij do kreski.<\/p>\n\n\n\n<p><strong>Roztw\u00f3r B (0,2 M wodorofosforan potasu, K<sub>2<\/sub>HPO<sub>4<\/sub>)<\/strong><\/p>\n\n\n\n<p>34,84 g K<sub>2<\/sub>HPO<sub>4<\/sub> &nbsp;x 3 H<sub>2<\/sub>O rozpu\u015b\u0107 w 800 ml wody. Przenie\u015b do kolby miarowej o obj\u0119to\u015bci 1000 ml i uzupe\u0142nij do kreski.<\/p>\n\n\n\n<p>By otrzyma\u0107 bufor o w\u0142a\u015bciwym pH, zmieszaj roztwory A i B zgodnie z poni\u017csz\u0105 tabel\u0105 i uzupe\u0142nij wod\u0105 do obj\u0119to\u015bci ko\u0144cowej 200 ml.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>pH<\/td><td>ml roztworu A (0,2 M KH<sub>2<\/sub>PO<sub>4<\/sub>)<\/td><td>Ml buforu B (0,2 M K<sub>2<\/sub>HPO<sub>4<\/sub>)<\/td><\/tr><tr><td>5.8<\/td><td>8.5<\/td><td>91.5<\/td><\/tr><tr><td>6.0<\/td><td>13.2<\/td><td>86.8<\/td><\/tr><tr><td>6.2<\/td><td>19.2<\/td><td>80.8<\/td><\/tr><tr><td>6.4<\/td><td>27.8<\/td><td>72.2<\/td><\/tr><tr><td>6.6<\/td><td>38.1<\/td><td>61.9<\/td><\/tr><tr><td>6.8<\/td><td>49.7<\/td><td>50.3<\/td><\/tr><tr><td>7.0<\/td><td>61.5<\/td><td>38.5<\/td><\/tr><tr><td>7.2<\/td><td>71.7<\/td><td>28.3<\/td><\/tr><tr><td>7.4<\/td><td>80.2<\/td><td>19.8<\/td><\/tr><tr><td>7.6<\/td><td>86.6<\/td><td>13.4<\/td><\/tr><tr><td>7.8<\/td><td>90.8<\/td><td>9.2<\/td><\/tr><tr><td>8.0<\/td><td>94.0<\/td><td>6.0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Zalecam przygotowywanie buforu na \u015bwie\u017co i zu\u017cycie go w przeci\u0105gu 2 tygodni. Roztwory A i B mo\u017cna przechowywa\u0107 d\u0142u\u017cej i u\u017cywa\u0107 ich jako wyj\u015bciowych do przygotowania buforu roboczego.<\/p>\n\n\n\n<p><strong>Literatura:<\/strong><\/p>\n\n\n\n<p>Kalkulator roztwor\u00f3w: <a href=\"https:\/\/www.sigmaaldrich.com\/PL\/pl\/support\/calculators-and-apps\/buffer-calculator\">https:\/\/www.sigmaaldrich.com\/PL\/pl\/support\/calculators-and-apps\/buffer-calculator<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3813289\/#:~:text=SDS%20is%20incompatible%20with%20some,show%20this%20property%20(8).\">https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3813289\/#:~:text=SDS%20is%20incompatible%20with%20some,show%20this%20property%20(8).<\/a><\/p>\n\n\n\n<p><strong>K\u0142yszejko-Stefanowicz, L. (red.). (2003). <em>\u0106wiczenia z biochemii<\/em>. Wydawnictwo Naukowe PWN.<\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bufor fosforanowy jest bardzo cz\u0119sto wykorzystywany w laboratorium. Jego zastosowania s\u0105 szerokie od bada\u0144 enzymatycznych po histologi\u0119. Wsz\u0119dzie tam, gdzie niezb\u0119dne jest zachowanie oboj\u0119tnego pH&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":107,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"class_list":["post-1761","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bufor fosforanowy - Bioeducator.eu<\/title>\n<meta name=\"description\" content=\"Przepis na bufor fosforanowy. Bufor sodowo fosforanowy, potasowo - fosforanowy. 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