• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Colorimetric Quantification Methods for Peracetic Acid together with Hydrogen Peroxide for Water Disinfection Process Control
【2h】

Colorimetric Quantification Methods for Peracetic Acid together with Hydrogen Peroxide for Water Disinfection Process Control

机译：过氧乙酸与过氧化氢比色定量方法在水消毒过程中的控制

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Peracetic acid (PAA) water solutions is applied for disinfection of industry systems, food products and non-potable water. Commercially available peracetic acid is always supplied mixed with hydrogen peroxide (H O ). H O degrade slower than the peracetic acid which creates a need to quantify both peroxides separately to gauge the disinfection power of the solution and the residuals. Two combinations of colorimetric reactions are presented that allows simultaneous quantification at the mg·L level used in disinfection liquids and water disinfection. The first dichromic reaction use titanium oxide oxalate (TiO-Ox) which only react with H O followed by addition of N,N-diethyl-p-phenylenediamine with iodide (DPD/I ) and the concentrations are read by simultaneously measuring the absorbance at 400 and 515 nm. Limit of quantification (LOQ) and maximal concentration determined was 4.6 µg·L and 2.5 mg·L for PAA and 9.1 µg·L and 5 mg·L for H O . The two color reactions didn’t interfere with each other when the reagent addition was consecutive. Another combination of colorimetric reaction also used where TiO-Ox was used to first measure H O at 400 nm, before addition of 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS)) and reading the absorbance at 405 nm. ABTS changes the absorbance at 405 nm necessitating the two measurements be done separately. LOQ and maximal concentration determined using ABTS colorimetric assay was 42.5 µg·L and 30 mg·L for PAA and for titanium oxide oxalate colorimetric assay was 12.7 µg·L and 75 mg·L for H O . Both methods tested satisfactory in typical water samples (Tap, sea, lake, and biological treated sewage) spiked with peracetic acid and H O , separately.
机译：过氧乙酸（PAA）水溶液用于工业系统，食品和非饮用水的消毒。始终将市售的过氧乙酸与过氧化氢（H O）混合使用。 H O的降解速度比过氧乙酸慢，因此需要分别定量两种过氧化物以测定溶液和残留物的消毒能力。提出了比色反应的两种组合，可以同时定量消毒液和水消毒液中使用的mg·L水平。第一个双色反应使用草酸钛（TiO-Ox），仅与HO反应，然后加入N，N-二乙基-对苯二胺和碘化物（DPD / I），并通过同时测量400吸光度来读取浓度和515 nm。 PAA的定量限（LOQ）和最大浓度分别为4.6 µg·L和2.5 mg·L，而H O分别为9.1 µg·L和5 mg·L。连续添加试剂时，两种颜色反应不会相互干扰。还可以使用比色反应的另一种组合，其中使用TiO-Ox首先在400 nm处测量HO，然后添加2,2'-叠氮基双（3-乙基苯并噻唑啉-6-磺酸（ABTS））并读取在405纳米ABTS更改405 nm处的吸光度，因此必须分别进行两次测量。用ABTS比色法测定的LOQ和最大浓度，PAA为42.5 µg·L和30 mg·L，草酸钛比色法为H O为12.7 µg·L和75 mg·L。两种方法在分别加有过氧乙酸和H O的典型水样（自来水，海洋，湖泊和经生物处理的污水）中测试均令人满意。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号