CdTe quantum point fluorimetric determination method of chlorine dioxide in water

A chlorine dioxide and fluorescence measurement technology, which is applied in the fields of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem of not seeing CdTe quantum dots, etc., and achieve the sensitive effect of the measurement method

Inactive Publication Date: 2008-11-05
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for measuring chlorine dioxide content include spectrophotometry, chromatography, electrometric method, flow injection method, chemiluminescence method, iodometric method, etc., but there is no report on CdTe quantum dots used in chlorine dioxide photometric analysis

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
  • CdTe quantum point fluorimetric determination method of chlorine dioxide in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0010] In a 5mL colorimetric tube, add 0.20, 0.30, 0.15, 0.15, and 0.15mL of CdTe quantum dot systems with particle sizes of 4.0, 4.6, 5.2, 6.5, and 8.6nm, respectively, at a concentration of 6.30×10 -4 mol / L CdTe solution; pH value is 8.58, 8.00, 8.89, 8.58, 8.30, the dosage is 0.20, 0.20, 0.15, 0.20, 0.20mL of NH 4 Cl-NH 3 Buffer solution and chlorine dioxide with a concentration of 10.62μg / mL have a volume of 0.10, 0.20, 0.40, 0.60, 0.80mL, add double distilled water to 2.0mL, shake well; measure the wavelength of each system to be 632.05, 665.94, 665.94, 709.00 , 748.05nm fluorescence intensity value F and blank value F 0 . Calculation of fluorescence quenching intensity ΔF=F 0 -F value, the linear regression equation of its fluorescence quenching intensity ΔF and chlorine dioxide concentration C is ΔF respectively 632.05nm =27.9C+3.3, ΔF 665.94 nm =41.2C+15.3, ΔF 665.94nm =14.6C-0.76, ΔF 709.00nm =28.1C-0.16, ΔF 748.05nm =17.2C-1.5.

[0011] Take another 1.0mL w...

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

No PUM Login to view more

Abstract

The present invention discloses a CdTe quantum dot fluorimetric determination method for detecting the chlorine dioxide in the water. In the 5mL color comparison tubes, the CdTe quantum dot systems with experiment grain diameters respectively for 4.0nm, 4.6nm, 5.2nm, 6.5nm and 8.6nm are respectively added with the following solutions with different volume: a CdTe solution with concentration for 6.30*10<-5>mol / L; NH4Cl-NH3 buffering solution which has a pH value of 8.0-9.1 for dosage 0.1-1.0Ml, and the chlorine dioxide with concentration 10.62mu g / mL respectively for 0.040-1.50mL, 0.10-1.0mL, 0.080-1.5mL, 0.015-0.80mL and 0.050-1.0mL. The secondary distilled water is added in to 2.0mL and is shaken up. The fluorescence intensity value F of each system when the wavelength is respectively 632.05nm, 665.94nm, 665.94nm, 709.00nm and 748.05nm. A fluorescence quenching intensity value deltaF is calculated according to the equation: deltaF=F0-F. Additionally water with right amount is added into, and the fluorescence quenching intensity value deltaF is calculated in the same way. Then the amount of chlorine dioxide in the water can be calculated. The determination method according to the invention has the advantages of sensitivity, easiness and quickness.

Description

technical field [0001] The invention relates to a method for measuring chlorine dioxide in water by a cadmium telluride (CdTe) quantum dot fluorescence method. Background technique [0002] Chlorine dioxide instead of chlorine gas has many advantages as a tap water disinfectant, such as no carcinogenic organic halogenated hydrocarbons (THMs), deodorization, deodorization, decolorization, and iron and manganese removal. However, after chlorine dioxide treats water, a series of oxygen-containing compounds of chlorine such as chlorate and chlorite will be produced, and the concentration of these compounds is too high to be harmful to the human body. Therefore, strictly controlling the dosage of chlorine dioxide is the key to ensuring the safety of drinking water. Therefore, the environmental protection department stipulates that the residual amount of chlorine dioxide must be less than 1.0 μg / mL. At present, the methods for determining the content of chlorine dioxide include s...

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
IPC IPC(8): G01N21/64
Inventor 梁爱惠蒋治良金文英谭茂宁吴宝玲
Owner GUILIN UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap