肉汁中氯化钠(盐分)含量检测方案(同步热分析仪)

Salinity (NaCl) of GravySeasoning NTIG-00084 keM Application Note Precipitation titration byAutomatic Potentiometric Titrator Standard 1.Abstract Salinity (NaCl) of gravy is determined by titration with 0.1mol/L silver nitrate adfternitric acid is added to the sample. Titration goes up to the endpoint， which is themaximum inflexion point on titration curve. Salinity is calculated from titration volume of silver nitrate solution. 2.Reference 1) JIS K 8150-2006 Sodium Chloride (Reagent) 2))Experiment and Calculation for Quantitative Analysis -Vol.2 by Seiji Takagifrom Kyoritsu Publishing company 3) Japanese Pharmacopoeia codex 15 Test Method for Sodium Chloride 3.Cautions in measurement 1))Use 1mol/L potassium nitrate for junction liquid of combination silver electrodein order to refrain from measurement error due to diffused chlorine. Or usemercury sulfate reference electrode. 2Polish the tip of silver electrode with abrasive paper before use.3If the sample does not show acidity， add nitric acid and measure in acid medium. ( 上海市漕溪路222号航天大厦北楼902室 网址： http：//www.kyoto-kem. net. cn ) 4.Post-measurement care After measurement is finished， polish the tip of electrode with abrasive paper. 5.Test equipment Main unit： Automatic potentiometric titrator (Preamplifier： STD-) Electrode： Option Silver electrode Option Mercury sulfate reference electrode 6.Reagent Titrant 0.1mol/L Silver nitrate solution (f=1.001) Additive Pure water， Nitric acid 7.Measurement procedure -Measurement- Sample 0.5g in a 100mL beaker， and add 50mL water.23 Add 5 drops of nitric acid. Titrate with 0.1mol/L Silver nitrate. Likewise，perform a blank test. 8.Formula Salinity(%)=(EP1 - BL1)×TF×C1×K1/SIZE EP1 ：TTitration volume(mL) BL1 ：Blank level (0.0038mL) Factor of titrant (1.001)ci Concentration conversion coefficient (5.844mg/mL) (Sodium chloride in mg equivalent to 1mL of 0.1mo1/L AgNO3) Kl Unit conversion coefficient(0.1) SIZE ：Sample size (g) ( 上海市漕溪路222号航天大厦北楼902室 网址： http：//www.kyoto-kem. net. cn ) 9.Example of measurement -Ambient condition- Room temperature ： 24℃ Humidity： 46% Weather ： Fair -Titration parameter -Titration curve- Model ： AT-510 MethodNo.： 11 Titr.mode ： Auto TitrationTitr.form ： EP Stop [Titration parameter] Form ： EP Stop APB No. ：1 Unit No. ：1Detector No. ：2Unit ：mVMax.Volume ：20.0mLWait Time ： Os Direction ： Auto [Control parameter] End Point No. ： 1 End sense ：Auto End PointArea ： OffSeparation ：OffOver Titr.Vol. ：0mLGain ：1Data samp.Pot.： 4.0mVData samp.Vol.：0.5mL Control Speed ： Medium Result parameter] Calc.Type ：SSampleConc.1 ： Set CO1=(EP1-BL1)*TF*C1*K1/SIZE Unit ：%EP No. ： 1 Temp.Comp.： Off C1(mg/mL) ：5.844K1 ：0.1 Titr. constantFactor ：1.001 Blank listBlank1 ：0.0038 ***Result*** Sample No.： 02-01Date ： 2000/06/06 09：53Method No.： 11 Method Name： Ruto Titration Blank1 ： 0.0038 Titr.Time ：00：03：39Size ：0.5061g Conc-1 6.7409% End Point-1 Volume 5，8357mL Potential ：- 120.2mV -、350 [mV1 500.0008.000[mL] (The above printout data were obtained from titration by AT-510) (The above printout data were obtained from titration by AT-510) 《Titration parameter> Form： of titration / APB No. the burette used in titration / Unit No.： APB Unit FilenumberDetector No.： the detector used in titration/ Max Volume： of titration Wait Time： before titration starts/ Direction.： of titration 《Control parameter》 End Point No.： number of EPs / End sense： of EP detection/ End Point Area： EP detection area Separation： of potential /Over Titr.Vol.over-titrated volume / Gain： sensitivity of detection signalData samp.Pot.： potential change of sampling signal / Data samp.Vol.： titration volume of sampling signal Control Speed： control mode of titration speed 《Calculation parameter> Calc.Type： of formula / Conc.1 formula 1 / Unit： of results /EP No. of calculation Temp.Comp.： temperature compensation/ C1(mg/mL)： concentration conversion coefficient K1： unit conversion coefficient / R：； constant /TF： factor of titration liquid/ Blank1： blank level 京都电子工业株式会社-可睦电子(上海)商贸有限公司 上海市漕溪路222号航天大厦北楼902室网址： http：//www. kyoto-kem.net.cn -Measurement resultss- n Sample(g) Titration(mL) NaCl(%) Batch calculated salinity 123 0.50610.5081 0.5073 5.8357 5.8685 5.8546 6.7409 6.7522 6.7467 MeanSD RSD 6.7466% 0.0057% 0.0838% The data were obtained from 3 tests of the same sample. Red underline shows the data from page 3/4. 10.Summary Gravy (“Tare”in Japanese) is a heavy taste seasoning used in cooking. Quality control and evaluation of gravy can be made by analysis of salinity.Sample measurement shows a good repeatability with 0.08% relative standarddeviation. Precise and reliable measurement is assured by automatic potentiometry. Sodium chloride in gravy sauce can be perfectly analyzed by any of the followingtitration systems manufactured by Kyoto Electronics (KEM). 【AT-610】 【AT-510】 【AT-500N-1】 AwardedProductt ofSupremeTechnology from Kyoto City ·Compact and cost performancemodel · Low cost and high performance · Easy view with back light LCD · Easy key entry by touch panel oflarge color LCD (8-inch wide) ·PC card expands data memory forconvenience and versatility. · GLP/GMP conformed model · Simultaneous titration in parallel · Bothpotentiometric and KarlFischer moisture titration(coulometric"volumetric) can beperformed at a time. KeM KYOTO ELECTRONICS MANUFACTURING CO.，LTD. Overseas Division： Yamawaki Bldg 9F，4-8-21 Kudan-minami，Chiyoda-ku， Tokyo 102-0074 JAPAN Phone：+81-3-3239-7333， Fax： +81-3-3237-0537 Head Office： 56-2Ninodan-cho，Shinden，Kisshoin，Minami-ku， Kyoto 601-8317 JAPAN Phone：+81-75-691-4122， Fax：+81-75-691-9961 URL： http：//www.kyoto-kem.com 京都电子工业株朱会社-可睦电子(上海)商贸有限公司 上海市漕曹路222号航天大厦北楼902室 电话：021-54488867 电邮： kemu-kem@163. com 网址： http：//www.kyoto-kem. net. cn 京都电子工业株朱会社-可睦电子(上海)商贸有限公司电话： 电邮： kemu-kem@ comTIG-Ver. 京都电子工业株朱会社-可睦电子(上海)商贸有限公司电话： 电邮： kemu-kem@ comTIG-Ver.