DPD chemistry can distinguish the active sanitizer, termed free available chlorine. When DPD in either liquid or tablet form is added to a water sample, a pink color forms with an intensity proportional to the chlorine concentration (either free or total, depending on the step you're on in ...
This analysis may be realized by both titrimetric and colorimetric procedures The influence of some parameters on this reaction, such as time for colour development, the comparison between two calibration curves for spectrophotometric procedure, relative standard deviation, and the use of small volumes ...
then the red hal f — quinonoid compound formed by the reaction was spectrophotometr i ca l ly determinated at 325 nm. The results showed that the calibration cHives were good linear between th e absorb anc e and the c on centrations of 0 . 05 ～2 . 0 mg/L with the c orrelation...
(1. QualityInspectionCenterofMaomingCompany,SINOPEC,Maoming525000,China;2.DalianPetroleumEquipmentCo., Ltd.,Dalian116600,China) Abstract:TheresidualchlorineinthecyclewaterwasdeterminedbyDPDspectrophotometricmethod.The conservationofsample,pHvalue,maskingagentandchmmogeniereactiontimewereinvestigated.Theresults showed...
DPD分光光度法测定水中游离余氯的探讨陆喜红,杨丽莉,叶瑾(南京市环境监测中心站,江苏南京210013)摘要:采用DPD分光光度法测定水中的游离余氯,验证了用高锰酸钾替代氯制剂配制标准溶液的有效性,方法在0mg/L～0.800mg/L范围内符合朗伯-比尔定律,检出限为0.01mg/L。使用次氯酸钠标准体系和高锰酸钾标准体系分别测定废水...
Product name FAS-DPD Titrating Reagent (Chlorine)Product number R-0875 Recommended use and restrictions To be used in accordance with manufacturer instructions or under the direct guidance of the manufacturer.Manufacturer Taylor Technologies, Inc.31 Loveton Circle Sparks, MD 21152 Phone: (410) 472-...
The mixing, the thermostating and the chemical reaction take place in a manifold with an engraved zigzag flow channel. A flow through detector is positioned at the flow channel outlet. The flow channel volume is about 25 μ l and the detector volume is 0.25 μ l. An experimental design ...
it' s linearity is borad .Beer law is obayed for residual chlorine in the range of 0 ～ 100 μg 50 mL , the molar absorptivity i s 1 .1×10 4 .Soret band of the colour complex lies in 553 nm .When residual chlorine at μg level is detected, the relative standard deviation (SDR...
收稿日期:20 4-02- 2 作者简介:林春凤( 978-),女,工程师,20 2年毕业于广东石油化工 学院化学工程专业,本科,主要从事水质的监测研究和管 理工作。 文章编号:1002-1124(2014)05-0038-04 Sum224No 5 化学工程师 ChemicalEngineer20 4年第05期 分析测试 目前,国内石化、电力等企业的循环水系统多 采用氯类杀菌...
DPD分光光度法测定水中游离余氯的探讨陆喜红,杨丽莉,叶瑾(南京市环境监测中心站,江苏南京210013)摘要:采用DPD分光光度法测定水中的游离余氯,验证了用高锰酸钾替代氯制剂配制标准溶液的有效性,方法在0mg/L～0.800mg/L范围内符合朗伯-比尔定律,检出限为0.01mg/L。使用次氯酸钠标准体系和高锰酸钾标准体系分别测定废水样品...