Method for in-situ detection of migration quantity of fluorescent whitening agent

A fluorescent whitening agent, in-situ detection technology, applied in the field of detection, can solve the problems of long detection time, severe operation methods, excessive precipitation of fluorescent whitening agent, etc., and achieves fast detection speed, reliable detection method, and accurate detection results. Effect

Inactive Publication Date: 2015-09-09
JILIN UNIV
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Problems solved by technology

Although the detection result of this method is accurate, the detection time is long and the operation method is severe, which may easily cause excessive precipitation of fluorescent whitening agent
Even so, this method is an indirect detection of optical brightener content and cannot directly detect the content of migrated optical brightener

Method used

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  • Method for in-situ detection of migration quantity of fluorescent whitening agent
  • Method for in-situ detection of migration quantity of fluorescent whitening agent
  • Method for in-situ detection of migration quantity of fluorescent whitening agent

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Embodiment Construction

[0029] The in-situ detection method of the present invention takes the national standard GB / T 27741-2011 as the theoretical basis, simulates and generates a standard curve of fluorescent whitening agent content to formulate a standard curve for the present invention, so that the detection value of the present invention is equivalent to the detection value of the national standard method, so the detection results With authenticity and accuracy. The fluorescent whitening agent migration detector used in the in-situ detection method is an analytical instrument established based on the optical Fermat principle and the chemical fluorescence detection principle of spectral analysis, including a casing, an in-situ pool, an RS232 interface, and multiple Each button, LCD screen, power socket and switch, and the microprocessor control circuit inside the case. Wherein, the in-situ pool contains a light source module, an information module and a paper carrier module. The method of the pr...

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Abstract

The invention discloses a method for in-situ detection of the migration quantity of a fluorescent whitening agent; a fluorescence content value A of a to-be-measured sample which is not used is measured, a fluorescence content value B is measured again after the to-be-measured sample is used, and the migration quantity of the fluorescent whitening agent=(A-B)/A*100%. The method comprises that firstly, the concentration of the fluorescent whitening agent at a certain part of the to-be-measured sample is detected when the to-be-measured sample does not make contact with a human body, then the concentration of the fluorescent whitening agent at the part is detected again after the to-be-measured sample makes contact with the human body, the concentrations of the fluorescent whitening agent before and after contact with the human body are compared, and thus the migration quantity of the fluorescent whitening agent can be obtained; the detection method can most truly and directly reflect the migration quantity of the fluorescent whitening agent. The method is fast in detection speed, and can provide a reliable detection method for on-site detection of the migration quantity of the fluorescent whitening agent in the sample.

Description

technical field [0001] The invention relates to a detection method, in particular to an in-situ detection method of the migration amount of a fluorescent whitening agent. Background technique [0002] Fluorescent whitening agent, commonly known as white dye, is a fluorescent dye and belongs to a complex organic compound. Its characteristic is that it can excite and absorb incident ultraviolet light to produce fluorescence, that is, after absorbing ultraviolet light (the wavelength range is about 360nm-380nm), it is excited to produce visible light with a wavelength in the range of 400nm-600nm, so it can compensate for the unwanted yellowish color in the matrix. As a result, the color of the item appears whiter, brighter and more vivid visually. Due to this characteristic, water-soluble fluorescent whitening agents are widely used in food, paper, paint, washing powder and cotton fabrics, while water-insoluble fluorescent whitening agents are used in chemical fibers, plastics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 于永李玉玲霍德发
Owner JILIN UNIV
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