Method for measuring perfluorooctane sulfonate by using dual-wavelength ratio ultraviolet spectroscopy, and application thereof

A technology of perfluorooctane sulfonic acid and ultraviolet spectrum, which is applied in the field of determination of perfluorooctane sulfonic acid and perfluorooctane sulfonic acid in environmental water samples by dual-wavelength ratio ultraviolet spectrometry, which can solve the problem of expensive instruments, Long analysis time, complex pre-treatment process and other problems, to achieve the effect of simple operation, high sensitivity and low cost
CN110749562AActive Publication Date: 2020-02-04GUANGDONG PHARMA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG PHARMA UNIV
Publication Date
2020-02-04

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Abstract

The invention relates to a method for measuring perfluorooctane sulfonate by using dual-wavelength ratio ultraviolet spectroscopy, and belongs to the field of physical and chemical inspection research. Perfluorooctane sulfonate molecules do not have ultraviolet absorption functional groups and do not have ultraviolet absorption properties. In the method provided by the invention, the ultraviolet absorption generates electrostatic interaction with toluidine blue under acidic conditions to form an ionic associate, the ionic associate shows two characteristic peaks at 632 nm and 502 nm and performs rational absorption, the concentration of a perfluorooctane sulfonate solution has a good linear relationship with an ultraviolet dual-wavelength absorption ratio value under selected conditions, and the dual-wavelength ratio ultraviolet spectroscopy for measuring the perfluorooctane sulfonate is established accordingly. The method provided by the invention is suitable for measuring the perfluorooctane sulfonate in environmental water samples, and has the advantages of simple and convenient operation, high sensitivity, strong anti-interference ability and the like.
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Description

technical field

[0001] The invention belongs to the field of physical and chemical inspection research, relates to a method for measuring perfluorooctane sulfonic acid by dual-wavelength ratio ultraviolet spectrometry, and is suitable for the determination of perfluorooctane sulfonic acid in environmental water samples. Background technique

[0002] Perfluorooctane sulfonic acid is an important and common synthetic perfluorinated organic compound. Due to its hydrophobic and oleophobic properties, high surface activity and extremely stable chemical properties, this compound and related chemicals are widely used in textiles, leather, etc. Products, carpets, furniture and other industrial and commercial fields have been used on a large scale for a long time. However, as people continue to study, it has been found that PFOS has been directly or indirectly discharged into the environment in production and life, is widely distributed in the environment but is difficult to degrade,...

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
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