Method for determining volatile phenol in water

A determination method and technology for volatilizing phenols, which are applied in the measurement of color/spectral properties, analysis by chemical reaction of materials, and material analysis by observing the impact on chemical indicators, etc. Time and other issues, to achieve the effect of simple operation, improved sensitivity, and reduced blank value

Inactive Publication Date: 2009-11-11
GUANGDONG OCEAN UNIVERSITY
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these methods, most of the reagents need to be processed, the process is cumbersome, the operation is relatively complicated, and it takes a long time.
Rare reports of method improvement using surfactants

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
  • Method for determining volatile phenol in water
  • Method for determining volatile phenol in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Determination of volatile phenols in tap water:

[0020] 1. Add freshly prepared 1.00μg / mL phenol standard solution 0.00, 0.50, 1.00, 3.00, 5.00, 7.00, 10.00mL to seven 50mL colorimetric tubes, add water to the mark, and then add ammonia buffer 0.50mL of the solution, mix well, add 0.40mL of 1% Tween-80 solution, mix well, then add 1.50mL of 2% 4-AAP solution, mix well for 2min, then add 1.00mL of 8% potassium ferricyanide solution, fully After mixing for 1 min and standing for 10 min, the absorbance values ​​were measured at a wavelength of 504 nm.

[0021] 2. Take the absorbance as the ordinate and the concentration as the abscissa to establish a standard curve, see figure 2 .

[0022] 3. Measure 1000mL of the tap water sample to be tested, and adjust the pH to above 12 with 40% NaOH. After evaporating and concentrating on an electric furnace to 50mL, transfer it to a 250mL all-glass still, use methyl orange as an indicator and use sulfuric acid solution to adjust...

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
absorbanceaaaaaaaaaa
absorbanceaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for determining volatile phenol in water. In color reaction using 4-amino-antipyrine direct spectrophotometry to determine volatile phenol in water, the method uses Tween-80 as nonionic surfactant to play a role in stability augmentation and sensitivity enhancement, reduce system blank value and improve determination sensitivity. The method comprises the following steps: accurately shifting 1.00 mu g/mL of freshly prepared phenol-standard solution or a certain amount of to-be-determined water sample subjected to predistillation into a 50mL colorimetric tube; adding water to a scale; adding 0.50 mL of ammoniacal buffer solution and fully mixing the materials; adding 0.40 mL of 1 percent Tween-80 solution and mixing the materials well; adding 1.50 mL of 2 percent 4-amino-antipyrine solution and fully mixing the materials for 2 minutes; adding 1.00 mL of 8 percent potassium ferricyanide solution, fully mixing the materials for 1 minute and keeping the mixture stand for 10 minutes; and then determining the absorbance value of the mixture. A colored compound solution prepared in the invention is stable for at least 2 hours, thus the stability of the colored compound solution is greatly enhanced than that in the prior method before improvement, and the colored compound solution is obviously lower in blank absorbance value and higher in sensitivity, and has detection limit lower than that of the national standard method. The method has the advantage of determining the volatile phenol in tap water samples, along with high recovery rate and accurate results.

Description

technical field [0001] The invention relates to a method for measuring volatile phenol content in water. Background technique [0002] Wastewater from oil refining, coking, gas washing, papermaking, synthetic ammonia, wood preservation, and chemical industry are the main sources of phenolic compounds in water, especially for drinking water, which seriously affects its water quality. According to different boiling points, phenol can be divided into volatile phenol and non-volatile phenol, and volatile phenol is the most harmful. Therefore, volatile phenols in water are one of the important indicators for water quality monitoring. [0003] The 4-aminoantipyrine photometric method for volatile phenols in water is a standard method in GB2001 "Hygienic Standards for Drinking Water", which has become a classic method and has been widely used. There are chloroform extraction method and direct photometric method in the photometric method of 4-aminoantipyrine. However, in use, the...

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): G01N21/78G01N21/31
Inventor 范润珍
Owner GUANGDONG OCEAN UNIVERSITY
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