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Efficient detection method capable of detecting multiple fluorescent whitening agents in paper product

A technology of fluorescent whitening agent and detection method, which is applied in the field of efficient detection of various fluorescent whitening agents in paper products, and can solve the problem of not being able to know the added substances and the amount added

Pending Publication Date: 2021-09-10
JIANGSU TIANCHENG PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese patent application number is CN201820238630.6, which discloses a fluorescent whitening agent detection device. By moving the operating lever to a suitable detection position, the object can be monitored by turning on the LED light switch and the ultraviolet light switch, and can be identified by the displayed color. Whether it contains fluorescent whitening agent, only semi-qualitative research can be carried out, and the specific added substances and added amount cannot be known

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of standard working solution: Weigh 5 mg of standard product into a brown 10 mL volumetric flask under light-proof conditions, dissolve it in 40% acetonitrile water, dilute to the mark, and sonicate for 10 minutes to obtain a standard solution; draw the above Put 200μg standard solution into a 10mL brown volumetric flask and dilute to the mark with 40% acetonitrile aqueous solution to obtain a mixed intermediate solution; draw 0.5μg of the above mixed intermediate solution into a 10mL brown volumetric flask and dilute to the mark with 40% acetonitrile aqueous solution to obtain a standard working solution liquid, stored in the dark; wherein, the pH of the 40% acetonitrile aqueous solution is 10, and the 40% acetonitrile aqueous solution is adjusted by triethylamine; the ultrasonic power is 1200W;

[0031] (2) Crushing: crush the paper product to be tested into strips through a paper shredder to obtain strips; take out the strips and transfer them to a hig...

Embodiment 2

[0036] (1) Preparation of standard working solution: Weigh 5 mg of standard product into a brown 10 mL volumetric flask under light-proof conditions, dissolve it in 40% acetonitrile water, dilute to the mark, and sonicate for 10 minutes to obtain a standard solution; draw the above Put 200μg standard solution into a 10mL brown volumetric flask and dilute to the mark with 40% acetonitrile aqueous solution to obtain a mixed intermediate solution; draw 0.5μg of the above mixed intermediate solution into a 10mL brown volumetric flask and dilute to the mark with 40% acetonitrile aqueous solution to obtain a standard working solution liquid, stored in the dark; wherein, the pH of the 40% acetonitrile aqueous solution is 11, and the 40% acetonitrile aqueous solution is adjusted by triethylamine; the ultrasonic power is 1200W;

[0037] (2) Crushing: the paper product to be tested is crushed into strips by a paper shredder to obtain strips; the above strips are taken out and then transf...

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Abstract

An efficient detection method capable of detecting multiple fluorescent whitening agents in a paper product comprises the following steps: (1) preparing a standard working solution; (2) crushing; (3) extracting; (4) drawing a standard curve: taking the standard working solution into a sample injection bottle, sequentially carrying out ultra-high performance liquid chromatography separation, PDA detector qualitative detection and FLD detector quantitative detection, obtaining the retention time of the standard working solution through the PDA detector qualitative detection, obtaining the peak area value of the standard working solution through the FLD detector quantitative detection, determining the nature according to retention time by adopting an external standard method, and quantifying the peak area; and drawing the standard curve by taking the peak area as a vertical coordinate and the concentration as a horizontal coordinate; and (5) detecting. According to the efficient detection method capable of detecting multiple fluorescent whitening agents in the paper product, the preparation steps are reasonable in design, 11 fluorescent whitening agents in the paper product can be qualitatively and quantitatively detected, the sensitivity is high, the reproducibility is good, the recovery rate and linearity meet the requirements, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of paper product detection, and in particular relates to an efficient detection method capable of detecting various fluorescent whitening agents in paper products. Background technique [0002] Fluorescent whitening agent is a kind of color regulator, commonly known as "white" dye, which can produce the effect of increasing whiteness and brightness when applied to the surface of the article, and is widely used in the paper industry. The whiteness of paper products is an important condition for considering the quality of paper products. Adding optical brighteners in the papermaking process can improve the whiteness of paper products and effectively slow down the rate of deterioration and yellowing of paper products. However, as a chemical raw material, fluorescent whitening agent will combine with protein in the human body once it enters the human body, increasing the burden on the liver, and it is difficult ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/047
Inventor 顾光成
Owner JIANGSU TIANCHENG PAPER IND
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