Method for measuring concentration of octadecylamine

A technology of concentration measurement and measurement method, which is applied in the field of chemical analysis, can solve the problems of extraction agent toxicity, error of experimental results, hazards, etc., achieve significant economic and environmental benefits, reduce operation steps, and shorten detection time.

Inactive Publication Date: 2011-05-18
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the former needs to prepare and add a large amount of reagents, and the analysis process is still cumbersome; although the latter has improved the original method, the determination process still needs to be extracted, the operation process has not been essentially simplified, and the extractant still has a certain toxic and flammable
Moreover, in some application fields, considering that the additive may cause subsequent hazards, it is required to only use octadec

Method used

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  • Method for measuring concentration of octadecylamine
  • Method for measuring concentration of octadecylamine
  • Method for measuring concentration of octadecylamine

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Get a small amount of octadecylamine, add and dissolve completely in 100ml water containing 1ml glacial acetic acid, take desalinated water as reference, measure the absorbance at 260nm place of the solution to be 0.014, obtain the concentration of octadecylamine after querying the standard curve to be 8.46mg / L; Add 1.50 mg of octadecylamine to the solution, the absorbance measured after dissolution is 0.174, and the corresponding concentration of octadecylamine is 22.80 mg / L, calculated by the recovery formula, the recovery rate is 95.60%.

[0033] The formula for calculating the recovery rate is as follows:

[0034] R = m 2 - m 1 Δm - - - ( 2 )

[0035] Among them, m 2 Indicates the measured value after standard addition; m 1 Indicates the o...

Embodiment 2

[0037]Get a small amount of octadecylamine, add and dissolve completely in 100ml water containing 1ml glacial acetic acid, take desalinated water as reference, measure the absorbance at 260nm place of the solution to be 0.042, obtain the concentration of octadecylamine after querying the standard curve to be 10.97mg / L; Add 1.50 mg of octadecylamine to the solution, the absorbance measured after dissolution is 0.198, and the corresponding concentration of octadecylamine is 24.95 mg / L, calculated by the recovery formula, the recovery rate is 93.20%.

Embodiment 3

[0039] Get a small amount of octadecylamine, add and dissolve completely in 100ml water containing 1ml glacial acetic acid, and use desalinated water as a reference, measure the absorbance at 260nm of the solution to be 0.078, and obtain the concentration of octadecylamine after querying the standard curve to be 14.19mg / L; Add 1.50mg octadecylamine to the solution, the absorbance measured after dissolving is 0.229, and the corresponding octadecylamine concentration is 27.72mg / L, which is calculated by the recovery formula, and the recovery rate is 90.20%.

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Abstract

The invention belongs to the technical field of chemical analysis and discloses a method for measuring the concentration of octadecylamine. The method comprises the following steps of: measuring the absorbance of standard octadecylamine solutions with different concentrations at a part within 256-270nm to obtain a standard curve, wherein each standard solution contains glacial acetic acid of the same concentration, and the concentration of the glacial acetic acid is 2-12ml/L; adding the glacial acetic acid of the same concentration to solutions to be measured and measuring the absorbance at a part with the same wavelength; and calculating the concentrations of the octadecylamine in the solutions to be measured according to the standard curve. The method can be used for conveniently, quickly and accurately measuring the concentration of the octadecylamine within the range of 10-50mg/L and has wide application aspects in the fields of raw material checking of the chemical industry, blowing out protection drug detection of thermal power plants, and the like.

Description

technical field [0001] The invention relates to a method for measuring the concentration of octadecylamine, in particular to a method for measuring the concentration of octadecylamine with a high content, and belongs to the technical field of chemical analysis. Background technique [0002] Octadecylamine is an important raw material for the production of many chemical products such as urea-based grease, and it is also the most widely used protection agent for thermal power plant equipment shutdown. Therefore, timely and accurate understanding of the content of octadecylamine in the application process determines whether qualified products can be obtained or whether it can play a good role in protecting thermal power plant equipment. At present, there are mainly two methods for determining the concentration of octadecylamine widely used: one is chloroform extraction spectrophotometry, which is based on the reaction of octadecylamine and methyl orange in a solution with a pH ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/33G01N1/38
Inventor 胡家元曹顺安韩建伟丁姗姗谢建丽詹艺
Owner WUHAN UNIV
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