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No.TIF-99301Y0581上海今昊科学仪器有限公司 上海市博华路980弄25号602室 201204www.chemyiqi.com Email:jojoanswer@hotmail.comTel:021-20230210 Fax: 021-20230210 KEM Application Note Kyoto Electronics Oxidation-Reduction titration No.NZ22-99277 Vitamin C in lemon tea -Abstract- According to JAS for determination of vitamin C, indophenol is used as sample liquidand titrated with test sample but this method requires exchange of titration solutionfor each test sample. In our method, the sample was titrated with the indophenolsolution of which factor was predetermined to make the process easier fordetermination of concentration. -Equipment- Main unit : Automatic potentiometric titrator AT-510 Detector : Standard preamplifier STD-510 Combined Pt electrode C-272+ #429-0012 —·Reagent- Titration solution : Indophenol solution -Method- (1)The sample was centrifuged at 3500rpm for 10 minutes. To 200mL beaker, about 1g of the above was added. Added pure water to make it total 100mL, and added 5 drops of acetic acid. Titrated with indophenol solution to determine concentration. -Calculation- Concentration (%):(EP1-BL1)×C1×K1/SIZE EP1: volume (mL) BL1: blank (mL)=0 SIZE: sample size (mL)C1: concentration conversion (mg/mL)=0.2712 K1: unit conversion coefficient=10 -Ambient condition- Temperature : 2 2. 5℃ Humidity :4 7 %Weather : cloudy -Literature JAS Japan Agricultural Standard (Bulletin No.1226 September 29 1990) Y0581 上海今昊科学仪器有限公司 上海市博华路980弄25号602室201204Tel:021-20230210 Fax: 021-20230210 www.chemyiqi.comEmail:jojoanswer@hotmail.com -Titration curve" ·Titration parameter- -Titration curve- ITitration Parameter Date:1999/08/12 10:16Sample ID : Lemon Tea Method No.: 26
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上海今昊科学仪器有限公司为您提供《自动电位滴定仪AT-510-柠檬茶中维C的测量》,该方案主要用于其他饮料中营养成分检测,参考标准《暂无》,《自动电位滴定仪AT-510-柠檬茶中维C的测量》用到的仪器有AT-700(KEM)自动电位滴定仪。
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