黑啤酒中总酸检测方案(食品品质检测)

黑啤酒中总酸的含量测定 应用资料电位滴定法，原理: 酸碱中和原理。用氢氧化钠标准溶液直接滴定啤酒试样中的总酸，以pH=8.2为电位滴定终点，根据消耗氢氧化钠标准溶液的体积计算出啤酒中总酸的含量。TIZ-99211enL上海市徐汇区宜山路333号1201室京都电子工业株式会社-可睦电子(上海)商贸有限公司电话：021-54488867 电邮： kemu-kem@163.com网址： http：//www.kem-china.comIKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application MemoAcidity of Black Beer Industry Food & beverage Instrument Automatic potentiometric titrator Measurement method Neutralization titration Standards GB/T 4928 1.Overview Dilute the sample after boiling and cool down. Lactic acid concentration in the sample ismeasured as acidity by titration with 0.1mol/L sodium hydroxide up to the pH8.2. The lacticacid concentration is calculated from the titration volume of the sodium hydroxide. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD)Electrode Combined glass electrodeTemperature compensation electrode 3. Reagents Titrant 0.1 mol/ L sodium hydroxide Sample size(mL) Titer(mL) Concentration(g/L) 1 2 3 25 2525 6.6106 6.6027 6.5923 2.362 2.360 2.356 AverageSD RSD(%) 2.359 0.003 0.1 -Titration curve-一 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd. Overseas Sales & Marketing Sect.