{"product_id":"buffer-solution-ph-12-1pt-zb1636-16","title":"Buffer Solution pH 12, 1 Pint","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat it is.\u003c\/strong\u003e This pH 12 buffer solution is a high-alkaline pH standard used to calibrate pH meters and electrodes for strongly basic samples. It is supplied in a 1-pint size for labs that measure above the range covered by standard pH 10 buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhen pH 12 calibration is needed.\u003c\/strong\u003e Routine calibration with pH 4, 7, and 10 covers most samples. When samples run above pH 10, such as caustic cleaning solutions, alkaline process streams, or strongly basic wastewater, a pH 12 buffer extends the calibration range so readings are interpolated rather than extrapolated beyond the last calibration point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow a buffer holds its pH.\u003c\/strong\u003e A buffer contains a weak acid and its conjugate base, or a weak base and its conjugate acid, in balanced amounts. When small amounts of acid or base enter the solution, one partner neutralizes them, so the pH barely moves. That resistance to change is what makes a buffer a reliable reference point for calibration, unlike plain water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe high-pH challenge.\u003c\/strong\u003e At high pH, glass electrodes can respond to sodium and other alkali ions in addition to hydrogen ions, an effect known as alkaline or sodium error, which makes readings lower than the true value. Calibrating near the measurement range with a pH 12 buffer helps reveal and reduce this error, and many labs use electrodes designed for high-pH work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly sensitive to carbon dioxide.\u003c\/strong\u003e Strongly alkaline buffers absorb carbon dioxide from the air faster than pH 10 buffers, lowering the pH over time. Keep the container tightly closed, pour out only what you need right before calibrating, and discard used buffer immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature matters.\u003c\/strong\u003e Buffer pH shifts slightly with temperature, so the stated value applies at 25 °C. Calibrate at the same temperature as your samples, use automatic temperature compensation, and apply the temperature-correction values supplied with the buffer when available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration best practice.\u003c\/strong\u003e Rinse the electrode with deionized water and blot it gently between buffers, immerse it in a fresh portion of buffer in a clean beaker, stir gently, and wait for a stable reading before accepting each point. Calibrate before each day's measurements, or more often as the method requires, and record the meter-reported slope to track electrode health.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhere it is used.\u003c\/strong\u003e Use pH 12 buffer in chemical manufacturing, metal finishing and cleaning operations, industrial wastewater treatment, pulp and paper, and research labs that work with strong bases. It pairs with Lab Pro's Buffer Solution pH 10, Blue and Buffer Solution pH 7, Yellow for calibration across the alkaline range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; border:1px solid #cfcfcf; margin-bottom:28px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003epH 12 buffer solution\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eNominal pH\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e12 at 25 °C\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003eUse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003eHigh-alkaline pH meter calibration\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left; width:32%; background:#f5f5f5;\"\u003e\u003cstrong\u003ePackage Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #cfcfcf; padding:8px 12px; vertical-align:top; text-align:left;\"\u003e\u003cstrong\u003e1 pint\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eApplications \/ Common Uses\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-pH calibration:\u003c\/strong\u003e Extends meter calibration above pH 10.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaustic solution testing:\u003c\/strong\u003e Brackets measurements of strong cleaning and etching solutions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial wastewater:\u003c\/strong\u003e Supports accurate readings of strongly alkaline effluent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrode performance checks:\u003c\/strong\u003e Reveals alkaline error in glass electrodes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess QC:\u003c\/strong\u003e Verifies in-line meters used in high-pH processes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStorage, Handling \u0026amp; Shipping\u003c\/h4\u003e\n\u003cp\u003eStore pH 12 buffer tightly closed at room temperature, protected from light and freezing. Because strongly alkaline solutions absorb carbon dioxide rapidly, open the container only when dispensing and use opened stock within the period stated on the label or certificate.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage temperature:\u003c\/strong\u003e Store at room temperature and protect from light and freezing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContamination control:\u003c\/strong\u003e Pour the amount needed into a clean beaker; never return used buffer to stock or dip an electrode into the stock container.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf life:\u003c\/strong\u003e Use before the expiration date on the label; once opened, use within the period stated on the certificate or label.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePersonal protection:\u003c\/strong\u003e Wear safety glasses and gloves; strongly alkaline solutions can irritate skin and eyes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRinsing:\u003c\/strong\u003e Rinse electrodes with deionized water between buffers to prevent carryover.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRelated Categories \u0026amp; Services\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eShop \u003ca href=\"https:\/\/labproinc.com\/collections\/ph-buffers\" target=\"_blank\" rel=\"noopener noreferrer\"\u003epH Buffers\u003c\/a\u003e for related products in this category.\u003c\/li\u003e\n\u003cli\u003eExplore \u003ca href=\"https:\/\/labproinc.com\/collections\/buffers-by-lab-pro\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBuffers by Lab Pro\u003c\/a\u003e and \u003ca href=\"https:\/\/labproinc.com\/pages\/buffers-standards-solutions\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eBuffers, Standards \u0026amp; Solutions\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/labproinc.com\/pages\/be-a-lab-pro-vmi-program\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eVendor Managed Inventory (VMI) Program\u003c\/a\u003e: Lab Pro can stock, track, and replenish this item on site so it never runs out. Contact info@labproinc.com or 888-452-2776 to set up a VMI assessment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRelated Articles\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labproinc.com\/blogs\/chemicals-and-solvents\/which-ph-buffer-solution-should-i-use\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eWhich pH Buffer Solution Should I Use When Calibrating?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labproinc.com\/blogs\/lab-equipment-calibration\/the-role-of-calibration-in-quality-control-maintaining-consistency-and-compliance\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eThe Role of Calibration in Quality Control: Maintaining Consistency and Compliance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/labproinc.com\/blogs\/chemicals-and-solvents\/what-is-the-proper-deionized-water-conductivity-range\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eWhat Is The Proper Deionized Water Conductivity Range?\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lab Pro Inc","offers":[{"title":"Default Title","offer_id":47266342699157,"sku":"ZB1636-16","price":25.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/2327\/6437\/files\/MainImage_fae56347-af87-49aa-9246-368b3ee266e0.png?v=1791875700","url":"https:\/\/checkout.labproinc.com\/products\/buffer-solution-ph-12-1pt-zb1636-16","provider":"Lab Pro Inc Plus","version":"1.0","type":"link"}