工业废水中总碱及酚酞碱度检测方案(自动电位滴定)

工业废水总碱及酚酞碱度的测定 应用资料根据JIS K 0102-2019-16，终点pH=4.8时，可认为近似等于氢离子和碳酸氢根离子的等当点，可用于测定水样的总碱度。终点为pH=8.3时，可认为近似等于碳酸盐和二氧化碳的浓度并表示水样中存在的几乎所有的氢氧化物和二分之一的碳酸盐已被滴定。KGM KYOTO ELECTRONICSMANUFACTURING CO.，LTD.TIQ-99314enL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.comK-MKYOTO ELECTRONICSMANUFACTURING CO.，LTD. Application Memo Alkali Consumption of Industrial Effluent IndustryEnvironmentalInstrumentAutomatic potentiometric titratorMeasurement methodAcid-base titrationStandardsJIS K 0102， GB/T 15451 1.Overview According to JIS K 0102-2019-16， the sample liquid is titrated with 0.1mol/L sodiumhydroxide up to pH4.8 and pH8.3. The measurement result is expressed by hydroxide ion(alkali) in mmol/L required to neutralize dissolved acids and metal ion which reacts withalkali or by amount (mg/L) of calcium carbonate equivalent to the alkali. H*(Various acids)+M²(Metal ion)+3OH→H2O+M(OH)2J Where： Various acids mean strong acid， weak acid and organic acid 2. Apparatus Main unit Automatic potentiometric titrator (preamplifier STD) Electrode Combined glass electrodeTemperature compensation electrode 3. Reagents 4. Example (mL) (mL) (mmol/L) EP-1 EP-2 EP-1 EP-2 ph4.8 ph8.3 ph4.8 ph8.3 1 100.0 1.65 2.93 1.65 2.93 2 100.0 1.69 2.92 1.69 2.92 3 100.0 1.68 2.87 1.68 2.87 Average 1.67 2.91 SD 0.02 0.03 RSD(%) 1 1 Please feel free to contact us for any further information. Kyoto Electronics Manufacturing Co.， Ltd.Overseas Sales & Marketing Sect.