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TIQ-99333enL-K-M KYOTO ELECTRONICSMANUFACTURING CO.,LTD. Application MemoPurity of Benzoic Acid 1.Overview Purity of benzoic acid is measured according to JIS K 8073-2017 Benzoic acid. Titrate with0.1mol/L sodium hydroxide after adding ethanol and pure water. Titration goes up to theendpoint, which is the maximum inflexion on the titration curve. Purity of benzoic acid can becalculated from the titration volume of sodium hydroxide. 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Combined glass electrode for micro titration Temperature compensation electrode 3. Reagents Titrant 0.1mol/L sodium hydroxide Solvent Pure water Additive Ethanol 4. Example Sample Titer Benzoic acid (g) (mL) (%) 1 0.4955 40.6698 99.20 2 0.4907 40.3759 99.45 3 0.5000 41.0843 99.31 Average 99.32 SD 0.12 Please feel free to contact us for any further information.
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