{"product_id":"aeration-oxidation-free-so2-test-kit","title":"Economy Aeration-Oxidation Free SO2 Test Kit","description":"\u003ch2\u003eMeasure free SO2 with the aeration-oxidation method\u003c\/h2\u003e\n\u003cp\u003eThe Economy Aeration-Oxidation Free SO2 Test Kit gives home and small-scale winemakers a reusable, lab-style way to measure free sulfur dioxide in wine. It includes the glassware, air pump, tubing, pipettes, syringe, and starter reagents needed to run the test. The supplied reagents are enough for approximately two to three tests; the apparatus can be cleaned and reused with fresh reagents.\u003c\/p\u003e\n\u003cp\u003eFree SO2 is the portion of sulfur dioxide available to help protect wine from oxidation and unwanted microbial activity. Measuring it gives you better information for sulfur additions than relying on an addition schedule alone. Accurate results still depend on careful sample measurement, tight tubing connections, fresh reagents, and a clearly observed titration endpoint.\u003c\/p\u003e\n\n\u003ch3\u003eHow the test works\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eA measured wine sample is acidified in the first flask.\u003c\/li\u003e\n  \u003cli\u003eThe pump moves the released sulfur dioxide into a second flask containing hydrogen peroxide and indicator.\u003c\/li\u003e\n  \u003cli\u003eThe trapped SO2 is converted to sulfuric acid, changing the indicator color.\u003c\/li\u003e\n  \u003cli\u003eThe receiving solution is titrated back to its starting endpoint with the supplied 0.01N sodium hydroxide.\u003c\/li\u003e\n  \u003cli\u003eFree SO2 is calculated in parts per million: milliliters of 0.01N sodium hydroxide used multiplied by 16.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThe pump portion of a test normally runs for 10 to 15 minutes, plus setup and titration time. The calculation above is specific to 0.01N sodium hydroxide. Do not substitute 0.1N sodium hydroxide and use the same formula.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo 125 mL flasks\u003c\/li\u003e\n  \u003cli\u003eTwo two-hole #5 stoppers\u003c\/li\u003e\n  \u003cli\u003eThree-piece glass tubing set\u003c\/li\u003e\n  \u003cli\u003eSilicone tubing and clear tubing\u003c\/li\u003e\n  \u003cli\u003eAspiration pump with 1\/4-inch flow regulator\u003c\/li\u003e\n  \u003cli\u003eTwo quick disconnects\u003c\/li\u003e\n  \u003cli\u003ePipette bulb\u003c\/li\u003e\n  \u003cli\u003e10 mL syringe\u003c\/li\u003e\n  \u003cli\u003e10 mL and 20 mL pipettes\u003c\/li\u003e\n  \u003cli\u003eStarter quantities of 3% hydrogen peroxide, 25% phosphoric acid, 0.01N sodium hydroxide, 0.01N hydrochloric acid, and SO2 indicator\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat else you need\u003c\/h3\u003e\n\u003cp\u003eHave distilled water, a clean work area, eye protection, chemical-resistant gloves, a waste container, and baking soda available before testing. Follow the included instructions for assembly, endpoint adjustment, testing, cleaning, storage, and disposal. For a compatible acid refill, see our \u003ca href=\"\/products\/phosphoric-acid-25-percent-1oz\"\u003e25% phosphoric acid solution\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eReagent care and safe handling\u003c\/h3\u003e\n\u003cp\u003eKeep the hydrogen peroxide and sodium hydroxide tightly sealed and refrigerated, then allow them to reach room temperature before use. As a practical guideline, replace opened hydrogen peroxide after about two to three months and opened sodium hydroxide after about three to four months. Label every reagent, keep chemicals away from food and children, and wear eye protection and gloves while working.\u003c\/p\u003e\n\u003cp\u003eThe spent wine sample still contains phosphoric acid. Neutralize it with baking soda as directed before disposal. Always follow the kit instructions and applicable local disposal requirements.\u003c\/p\u003e\n\n\u003ch3\u003eAeration-oxidation kit or Titrets?\u003c\/h3\u003e\n\u003cp\u003eChoose this kit when you want a reusable apparatus and are comfortable measuring samples and performing a titration. For a more compact, single-use option, compare the \u003ca href=\"\/products\/titrets-free-so2-test\"\u003eTitrets Free SO2 Tester\u003c\/a\u003e. Each method has its own procedure and limitations, so use the instructions supplied with the product you select.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this kit measure free or total SO2?\u003c\/strong\u003e\u003cbr\u003eThis kit is configured to measure free SO2.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests are included?\u003c\/strong\u003e\u003cbr\u003eThe starter reagents support approximately two to three tests. The pump, tubing, glassware, pipettes, and syringe are reusable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does one test take?\u003c\/strong\u003e\u003cbr\u003eAllow 10 to 15 minutes for the pump run, plus time to prepare the sample, adjust the endpoint, titrate, calculate the result, and clean the equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use 0.1N sodium hydroxide?\u003c\/strong\u003e\u003cbr\u003eNo. The stated calculation—milliliters used multiplied by 16—requires 0.01N sodium hydroxide.\u003c\/p\u003e","brand":"SoCal Brewing Supply","offers":[{"title":"Default Title","offer_id":67593797959958,"sku":"wine-so2-test-kit-aeration-oxidation","price":134.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0814\/4807\/5542\/files\/economy-aeration-oxidation-free-so2-test-kit.jpg?v=1790528356","url":"https:\/\/socalbrewingsupply.com\/products\/aeration-oxidation-free-so2-test-kit","provider":"SoCal Brewing Supply","version":"1.0","type":"link"}