红葡萄酒中总酸检测方案(自动电位滴定)

红葡萄酒中总酸的测定 应用资料利用酸碱中和原理，用氢氧化钠标准滴定溶液直接滴定样品中的有机酸，以pH=8.2为电位滴定终点，根据消耗氢氧化钠标准滴定溶液的体积，计算试样的总酸含量。起泡葡萄酒和葡萄汽酒，吸取约60mL样品于100mL烧杯中，将烧杯置于40°C±0.1°C振荡水浴中恒温30min，取出，冷却至室温。目的是排除二氧化碳。TIF-12002enLK-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoAcidity of Red Wine Industry Food & beverage Instrument Automatic potentiometric titrator Measurement method Acid-base titration Standards Official Analysis Method of National Tax Agency JAPAN， GB/T 15038 1.Overview Wine acidity is measured by neutralization titration with sodium hydroxide according to theabove standard. The diluted red wine sample is titrated with 0.1ml/L sodium hydroxide up topH8.2 and the titration volume is converted to the tartaric acid concentration as acidity. If asample wine contains carbon dioxide gas， first boil to degas. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Combined glass electrode Temperature compensation electrode 3. Reagents Titrant 0.1mol/L sodium hydroxide 4. Example Sample Titer Acidity(mL) (mL) (g/100mL) 1 10.00 7.0950 0.5400 2 3 10.00 7.0950 0.5400 10.00 7.0861 0.5393 AverageSD RSD(%) 0.5398 0.0004 0.07 [nL3 —Titration curve一 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd.Overseas Sales & Marketing Sect. 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市徐汇区宜山路333号1201室 电话： 021-54488867 电邮： kemu-kem@163.com 网址： http：//www.kem-china.com