Method for determining target organic matters in waste acid

The content of target organic matter in waste acid is accurately measured by liquid chromatography combined with external standard curve method, which solves the problem of incomplete removal of organic matter in waste acid, and achieves high accuracy and efficient detection effects.

CN119715865APending Publication Date: 2025-03-28SICHUAN NORTH HONGGUANG SPECIAL CHEM CO LTD
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Patent Information

Application Number
CN202411965223.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The waste acid produced during chemical production contains characteristic pollutants, such as toluene, o-xylene and other organic matter, which leads to cross-contamination and incomplete removal during recycling, affecting the safety and production stability of recycling.

Method used

Liquid chromatography combined with external standard standard curve method was used to prepare a standard sample solution of target organic matter, and gradient elution was performed using a C18 chromatography column and a diode array detector to determine the content of target organic matter in waste acid.

Benefits of technology

The accurate determination of the target organic matter in the waste acid was achieved, the spiking recovery rate was between 95.3% and 104.7%, and the RSD was <3%, ensuring high accuracy and reliability of the detection.

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Abstract

The invention relates to the technical field of organic matter determination, and provides a method for determining a target organic matter in waste acid, which comprises the following steps: preparing standard sample solutions of various different organic matters, detecting by using a liquid chromatography, and determining the corresponding relationship between the peak area of each organic matter and the content of each organic matter, respectively obtaining standard curves of different organic matters; preparing a waste acid solution, performing chromatographic detection by using liquid chromatography, and recording peak areas of different obtained target organic matters; according to the obtained standard curves of the different organic matters, the absolute content of the different target organic matters in the waste acid solution is measured; the detection method is good in accuracy, can be used for determining the target organic matters in the waste acid, and can accurately determine the content of each target organic matter in the waste acid.
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