Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-detection-limit detection method for ClO2 <-> in water

A detection method and detection limit technology, applied in chemical method analysis, measuring device, chemical analysis by titration method, etc., can solve the problem of unfavorable chloride ion detection widely popularized and applied, high detection limit concentration, high detection limit question

Active Publication Date: 2021-12-03
北京市科学技术研究院分析测试研究所(北京市理化分析测试中心) +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for ClO alone in water 2 - There are still problems in the detection, the most prominent problem is its high detection limit concentration
Currently, ClO in water 2 - The concentration needs to reach 0.2mg / L before it can be detected by the iodometric method. For a small amount of ClO in water 2 - Therefore, the detection limit is relatively high, which is not conducive to the in-depth research and wide application of the detection of various chloride ions in drinking water.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-detection-limit detection method for ClO2 &lt;-&gt; in water
  • Low-detection-limit detection method for ClO2 &lt;-&gt; in water
  • Low-detection-limit detection method for ClO2 &lt;-&gt; in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] ClO in water described in this embodiment 2 - A low detection limit detection method, using a photothermopotential analyzer, includes the following steps:

[0040] S100: ClO prepared with distilled water and chlorite standards 2 - Standard solution (0.15mol / L), in ClO 2 - Add NaH to the solution 2 PO 4 and Na 2 HPO 4 Buffer solution, adjust the pH value to 6;

[0041] The chlorite standard product is the water quality chlorite environmental standard sample, which complies with the national standard GSB 07-2975-2013, and is produced by the Standard Sample Research Institute of the Ministry of Environmental Protection;

[0042] S200: Add 1 g of potassium iodide to the solution obtained in step S100, and after fully dissolving, obtain a solution to be reacted;

[0043] S300: Use concentrated hydrochloric acid to adjust the pH value of the solution to be reacted to 3 to obtain a reaction solution, and immediately put the reaction solution in a dark place to react ...

Embodiment 2

[0056] ClO in water described in this embodiment 2 - The detection method of the low detection limit is the same as Example 2, the difference is that, in step S100, adding NaH 2 PO 4 and Na 2 HPO 4 Buffer solution, adjusted to pH 7.

Embodiment 3

[0058] ClO in water described in this embodiment 2 - The detection method of the low detection limit is the same as Example 2, the difference is that, in step S100, adding NaH 2 PO 4 and Na 2 HPO 4 Buffer solution, adjusted to pH 8.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a low-detection-limit detection method for ClO2 <-> in water, which uses a photo-thermal potential analyzer and comprises the following steps: S100, preparing a ClO2 <-> solution by using distilled water, adding a phosphate buffer solution into the ClO2 <-> solution, and adjusting the pH value to 6-8; S200, adding potassium iodide into the solution obtained in the step S100, and dissolving to obtain a solution to be reacted; S300, adjusting the pH value of the to-be-reacted solution to 2-3 to obtain a reaction solution, and immediately putting the reaction solution in a dark place to react for 5-6 minutes; S400, adjusting the pH value of the solution obtained in the step S300 to 3-5, simultaneously adding a starch indicator and potassium iodide, mixing and dissolving, and immediately titrating by using a sodium thiosulfate standard solution when the photometric electrode starts to feed back a signal; and S500, recording the volume of the consumed sodium thiosulfate standard solution at the titration end point, and calculating the concentration of ClO2 <-> in water.

Description

technical field [0001] The invention belongs to ClO in water 2 - Content determination technical field, be specifically related to a kind of ClO in water 2 - detection method with a low detection limit. Background technique [0002] For the detection of various chloride ions in drinking water, especially ClO in water 2 , Cl 2 , ClO 2 - , and ClO 3 - Those skilled in the art have studied the continuous iodometric method, and have explored a test method for the mutual conversion or reaction between the above-mentioned multiple valence states of chloride ions. However, for ClO alone in water 2 - There are still problems in the detection, the most prominent problem is its high detection limit concentration. Currently, ClO in water 2 - The concentration needs to reach 0.2mg / L before it can be detected by the iodometric method. For a small amount of ClO in water 2 - Therefore, the detection limit is relatively high, which is not conducive to the in-depth research a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/79
CPCG01N31/162G01N31/164G01N21/79Y02A20/20
Inventor 郎爽李曙光贾丽周阳周欣燃马立利
Owner 北京市科学技术研究院分析测试研究所(北京市理化分析测试中心)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com