调味料中盐分（氯化钠）检测方案(自动电位滴定)

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调味料中盐分(氯化钠)的测定 应用资料向样品中加入硝酸和水后，用0.1mol/L硝酸银溶液滴定法测定盐分(氯化钠)。终点是滴定曲线上的最大突跃点。盐分浓度是根据硝酸银溶液的滴定体积计算出来的。KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIF-00028enLK-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application Memo Salt Content (NaCl) In Dressing IndustryFood & beverageInstrumentAutomatic potentiometric titratorMeasurement methodPrecipitation titrationStandardsGB/T 12457， GB 5009.44 1.Overview After adding nitric acid and water to the sample， salt is measured by titration with 0.1mol/Lsilver nitrate solution. The endpoint is the maximum inflexion on the titration curve. The saltconcentration is calculated from the titration volume of the silver nitrate solution. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD)Electrode Combined silver electrode 3. Reagents Titrant 0.1mol/L silver nitrate solution Solvent Water Additive Nitric acid (1.38) 4. Example —-Measurement resultsS-一 Sample size Titer Concentration (g) (mL) (%) 1 1.0292 9.8560 5.5964 2 1.0162 9.7304 5.5958 3 1.0126 9.6944 5.5949 Average 5.5957 SD 0.0008 RSD(%) 0.01 16.000+ [mL]+ —Titration curve- 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