工业水处理 ›› 2020, Vol. 40 ›› Issue (7): 103-106. doi: 10.11894/iwt.2019-0736

• 分析与监测 • 上一篇    下一篇

分散液液微萃取-分光光度法测定水中的亚甲基蓝

杨靖1(),吕瑞2   

  1. 1. 中科院成都山地灾害与环境研究所, 四川成都 610041
    2. 绵阳师范学院化学与化学工程学院, 四川绵阳 621000
  • 收稿日期:2020-05-25 出版日期:2020-07-20 发布日期:2020-07-21
  • 作者简介:杨靖(1985-), 硕士, 实验师。电话:028-85217656, E-mail:yangjing@imde.ac.cn
  • 基金资助:
    四川省教育厅一般项目(18ZB0298);绵阳师范学院校级自然科学基金项目(MYSY2018T007)

Determination of methylene blue in water samples combined dispersive liquid-liquid microextraction with spectrophotometry

Jing Yang1(),Rui Lü2   

  1. 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    2. Department of Chemistry and Chemical Engineering, Mianyang Teacher's College, Mianyang 621000, China
  • Received:2020-05-25 Online:2020-07-20 Published:2020-07-21

摘要:

建立了一种快速、高效、环保的分散液液微萃取-分光光度法测定环境水样中亚甲基蓝的分析方法。考察了分散剂与萃取剂的种类和体积、萃取时间、离心时间、pH等因素对萃取效率的影响。在优化后的实验条件下,方法的检出限为8.47 μg/L,加标回收率在96.38%~103.30%,相对标准偏差均小于3.90%。该方法具有快速、高效、环境友好等特点,适用于环境水样中亚甲基蓝的分析测定。

关键词: 亚甲基蓝, 分散液液微萃取, 环境水样, 分光光度法

Abstract:

A rapid, efficient and environmentally friendly method for the determination of methylene blue in environmental water samples by dispersive liquid-liquid microextraction coupled with spectrophotometry is established. The factors affected the extraction efficiency were studied, such as the types and volume of extractants and dispersants, the time of extraction and centrifugation, the pH of solution, etc. Under the optimized conditions, the results showed that the detection limit of this method was 8.47 μg/L, the recovery rate was between 96.38%-103.30%, and the relative standard deviations were less than 3.90%. The method was fast, efficient and environmentally friendly, and could be used for the determination of methylene blue in environmental water samples.

Key words: methylene blue, dispersive liquid-liquid microextraction, environmental water, spectrophotometry

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