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Method for determining content of polyepoxysuccinic acid

A technology of polyepoxysuccinic acid and content, which is applied in the field of analysis, can solve the problems of secondary pollution, instability, and difficult degradation, and achieve the effects of drug stability, rapid determination, and low price

Inactive Publication Date: 2019-09-20
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is described in U.S. Patent 5958778, but the fluorescent substance used in this method has a stable structure and is not easy to degrade, which brings secondary pollution to the environment
In addition, the polymer in the drug will degrade and its content will decrease as time goes by; but the content of the fluorescent substance remains basically unchanged, which makes the measurement result larger
Patent CN201110154759 describes a method for measuring the content of polyepoxysuccinic acid in circulating water by spectrophotometric pinacyanohydrin chloride, which is expensive and unstable
Patent CN201610892294 uses the gravimetric method to measure the concentration of polymers, and the water samples need to be filtered, separated, dialyzed and other steps, and the steps of this method are cumbersome
Patent CN105987902A uses cationic dyes to measure the content of anionic polymers in industrial water, and many cationic dyes are unstable in solution

Method used

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  • Method for determining content of polyepoxysuccinic acid
  • Method for determining content of polyepoxysuccinic acid
  • Method for determining content of polyepoxysuccinic acid

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Embodiment 1

[0018] 1. Add polyepoxysuccinic acid to ultrapure water to prepare 4, 12, 20, 40 mg·L -1 Standard water sample of polyepoxysuccinic acid, add dodecyl dimethyl benzyl ammonium chloride to the standard water sample, the addition of dodecyl dimethyl benzyl ammonium chloride per liter of standard water sample The amount is 300mg, then adjust the pH value of the standard water sample with NaOH to be 8, let it stand at room temperature for 30 minutes, then measure the absorbance of the system corresponding to different polyepoxysuccinic acid concentrations at 420nm wavelength with a UV spectrophotometer, and draw the absorbance value with Standard curve of polyepoxysuccinic acid concentration change in standard water samples.

[0019] The absorbance used in the present invention is determined according to Lambert-Beer's law: A=εlc, wherein A is the absorbance, ε is the absorbance of the associate, l is the optical path length, and c is the concentration of polyepoxysuccinic acid. I...

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Abstract

The invention discloses a method for determining the content of polyepoxysuccinic acid. The method comprises the steps of: determining the absorbance of an association compound solution of polyepoxysuccinic acid and dodecyl dimethyl benzyl ammonium chloride in a to-be-determined circulating water sample at a wavelength of 420 nm, and determining the concentration of polyepoxysuccinic acid in the circulating water through a predetermined calibration curve. The method is quick, simple and convenient, and the used medicament is stable and low in price, and can meet the requirement of determining the content of the polyepoxysuccinic acid in the circulating water.

Description

technical field [0001] The invention belongs to the technical field of analysis and relates to the determination of polyepoxysuccinic acid in industrial circulating water systems. Specifically, the concentration of the polymer in industrial circulating water was determined based on the interaction of cationic surfactants and polyepoxysuccinic acid. Background technique [0002] In recent years, the eutrophication of aquatic plants has become increasingly serious due to the discharge of phosphorus-containing substances in the used water treatment agents into the water. Based on this, the country has strict requirements on the discharge of phosphorus content, so phosphorus-free water treatment agents have become a development trend. . Polyepoxysuccinic acid is phosphorus-free, biodegradable and has strong scale and corrosion inhibition properties, so it is often used in phosphorus-free water treatment chemicals. [0003] To ensure the scale and corrosion inhibition function ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/38
CPCG01N1/38G01N21/31
Inventor 王玲燕张国辉王丽莉胡静
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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