Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for determining polysorbate nonionic surfactant

A surfactant, polysorbate technology, applied in the field of chemical determination, can solve the problems affecting the migration and degradation of other coexisting organic substances, toxicity and so on

Inactive Publication Date: 2010-10-06
NORTHEAST NORMAL UNIVERSITY
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-ionic surfactants are toxic to fish and aquatic organisms, affect the migration and degradation of other coexisting organic matter in the environment, and their adsorption on soil / sediments can limit their application in synergistic remediation of organic pollution such as soil
[0004] At present, the analysis methods of nonionic surfactants include gas chromatography and thin layer chromatography, but these methods require large-scale instrument analysis equipment

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Determination of the amount of polysorbate 20 adsorbed by sand.

[0021] (1) Pass the sand through a sieve with a diameter of 2 mm, weigh 2 g of sand and place it in a 250 mL conical flask.

[0022] (2) Add accurately 2000mg·L to the conical flask -1 50mL of polysorbate 20 solution, immediately covered with a rubber stopper lined with polytetrafluoroethylene.

[0023] (3) The conical flask was shaken at a constant temperature (30°C) in a shaker at 150 rpm for 24 hours to ensure that the adsorption reached equilibrium.

[0024] (4) Take out the Erlenmeyer flask after 24h and centrifuge at 4500prm for 10min.

[0025] (5) Take the supernatant after centrifugation, measure the concentration of the polysorbate 20 solution in the solution by the method described in the present invention, and calculate the adsorption amount of the sand polysorbate 20 by the subtraction method.

[0026] (6) After determination, the concentration is 2000mg·L -1 The equilibrium concentration of po...

Embodiment 2

[0027] Example 2 Determination of the amount of polysorbate 20 adsorbed by sandy loam.

[0028] (1) Pass the sandy loam soil through a sieve with a diameter of 2 mm, and weigh 2 g of the sieved sandy loam soil into a 250 mL conical flask.

[0029] (2) Accurately add 50 mL of polysorbate 20 solution with a concentration of 1600 mg / L to the conical flask, and immediately cover with a rubber stopper lined with polytetrafluoroethylene.

[0030] (3) The conical flask was shaken at a constant temperature (30°C) in a shaker at 150 rpm for 24 hours to ensure that the adsorption reached equilibrium.

[0031] (4) Take out the Erlenmeyer flask after 24h and centrifuge at 4500prm for 10min.

[0032] (5) Take the supernatant after centrifugation, use the method described in the present invention to determine the concentration of the polysorbate 20 solution in the solution, and calculate the amount of sand adsorbed on the polysorbate 20 by the subtraction method.

[0033] (6) After determination, the ...

Embodiment 3

[0034] Example 3 Determination of the amount of clay adsorbed to polysorbate 20.

[0035] (1) Pass the sandy loam soil through a sieve with a diameter of 2 mm, and weigh 2 g of the sieved clay into a 250 mL conical flask.

[0036] (2) Accurately add 800mg L to the conical flask -1 50mL of polysorbate 20 solution, immediately covered with a rubber stopper lined with polytetrafluoroethylene.

[0037] (3) The conical flask was shaken at a constant temperature (30°C) in a shaker at 150 rpm for 24 hours to ensure that the adsorption reached equilibrium.

[0038] (4) Take out the Erlenmeyer flask after 24h and centrifuge at 4500prm for 10min.

[0039] (5) Take the supernatant after centrifugation, use the method described in the present invention to measure the concentration of the polysorbate 20 solution in the solution, and calculate the amount of clay adsorbed on the polysorbate 20 by the subtraction method.

[0040] (6) After determination, the concentration is 1600mgL -1 After being adsor...

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 invention belongs to a chemical determining method, and in particular relates to a method for determining a nonionic surfactant. The method comprises the following steps of: setting a color developing condition by a color development reaction; establishing a linear equation between the light absorbing value and the concentration of polysorbate 20, namely Y = 0.016X + 0.2313, wherein the linear correlation coefficient r is equal to 0.9996, the molar absorption coefficient epsilon is equal to 0.016 L.mol<-1>.cm<-1>, the linear range is 5 to 50 mg.L<-1>, and the detection limit is 0.54 mg.L<-1>. The method for determining nonionic surfactant polysorbate 20 is established by adopting spectrophotometry. The method has the characteristics of simplicity and convenience, rapidness, high selectivity, high sensitivity and the like, and can be used for analytic determination of the nonionic surfactant polysorbate 20 in environmental water and soil.

Description

Technical field [0001] The invention belongs to a chemical determination method, and specifically relates to a determination method of a non-ionic surfactant. Background technique [0002] Surfactant refers to a substance with fixed hydrophilic and lipophilic groups that can be aligned on the surface of the solution and can significantly reduce the surface tension. It has dispersion, wetting, penetration, solubilization, emulsification, foaming, and lubrication. , Sterilization and many other properties, widely used in textile, paper, food, plastic, leather, petroleum, chemical fiber, medicine, pesticide, dye, fertilizer, film, metal processing, mineral processing and building materials and other industries, known as "industrial MSG". According to the different molecular structure, surfactants can be divided into ionic and non-ionic. [0003] Polysorbate 20 is the trade name of a non-ionic surfactant. Its chemical name is polyoxyethylene sorbitan monolaurate. It is a light yellow ...

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): G01N21/78
Inventor 王小雨冯江
Owner NORTHEAST NORMAL UNIVERSITY