Method for detecting content of fluorescent brightening agent in paper

A fluorescent whitening agent and detection method technology, applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of judgment difference, unable to quantitatively evaluate paper fluorescent substances, etc., achieve fast detection speed, avoid manual interpretation errors, and data good repeatability

Inactive Publication Date: 2013-07-03
富阳市质量计量监测中心
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Problems solved by technology

[0018] At present, the determination method of fluorescent agent components in paper is usually based on the national standard GB/T 5009.78-2003 "Analysis Method for Hygienic Standards of Base Paper for Food Packaging". Under the conditions of 254nm and 365nm ultraviolet light irradiation, the maximum fluorescent

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  • Method for detecting content of fluorescent brightening agent in paper
  • Method for detecting content of fluorescent brightening agent in paper

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Embodiment 1

[0036] Instruments used in the experiment: fluorescence spectrophotometer, several conical flasks with stoppers, 100ml quantitative flask

[0037] Main methods: spectrophotometry, colorimetry

[0038] Experimental steps:

[0039] 1) Sample pretreatment: Cut toilet paper samples of different brands into 1-2cm in size2 Weigh 10.00g and place it in a 250ml Erlenmeyer flask with a stopper, and use the following four methods to process the sample: A, soak in cold water for 24 hours; B, soak in boiling water for 24 hours; C, soak in acetic acid aqueous solution (concentration 4%) for 2 hours, room temperature; D. Ethanol aqueous solution (concentration 65%) leaching 2h, room temperature.

[0040] 2) Adjust the excitation wavelength of the fluorescence spectrophotometer to 345nm, and measure the sample after the instrument is stable. The qualitative filter paper soaking solution was used as a blank sample, and the fluorescence intensity was measured with a fluorescence spectrophoto...

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Abstract

The invention provides a method for detecting a fluorescent brightening agent in paper. The method comprises the steps as follows: 1), sample pretreatment: preparing a standard fragment sample, and soaking the standard fragment sample by different solutions respectively after weighed; 2), adjusting the excitation wavelength of a fluorospectro photometer to be 345 nm, and detecting the sample; 3), weighing a defined quantity of a VBL fluorescent brightening agent to configure a standard liquid with appropriate concentration, scanning an excitation curve and an emission curve, and measuring a standard curve; and 4), measuring the content of the fluorescent brightening agent in different paper samples, and obtaining the content of the fluorescent brightening agent of the detected paper sample through comparison with the standard curve. Compared with a traditional detecting method, the method provided by the invention can detect relevant data rapidly and accurately, the problem of manual interpretation errors caused by manual operation is avoided, and the health and safety of relevant toilet paper products can be elevated accurately; and meanwhile, experimental instruments adopted by the invention are simple, the data repeatability is good, the reliable quality monitoring guarantee is provided, and accordingly the guaranteeing advantages on the product quality monitoring are achieved.

Description

technical field [0001] The invention relates to the technical field of quantitative detection methods for fluorescent whitening agents in household papers such as toilet papers that are in contact with human bodies. Background technique [0002] In the production process of toilet paper, many manufacturers use recycled waste paper as the main pulp raw material in order to reduce production costs. Since the waste paper will inevitably bring ink into the pulp during the recycling process, it reduces the cost of paper. Whiteness. In order to make up for the loss of whiteness, some manufacturers add fluorescent whitening agents to the pulp. Although the visual whiteness of the paper is improved, the fluorescent whitening agents are absorbed by the human body after the skin contacts them, and accumulate in the human body, weakening the whiteness. Immunity of the human body increases the burden on the liver, and may also lead to cell distortion. When in contact with the human bod...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 沃其中冯勤伟唐彩燕胡丽霞孙云杰章璠王维嘉赵阳
Owner 富阳市质量计量监测中心
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