Test method for fluorescent brightener in the hott

2022-08-06
  • Detail

Test method for fluorescent brighteners in food paper packaging materials

release date: Source: Internet editor: litchi browsing times: with the development of electronic technology and computer technology 12058 copyright and disclaimer

core tips: food paper packaging materials are packaging materials in direct contact with food, and the quality and safety of calcium silicate masterbatch produced by them is also the focus of public attention. The purpose of this paper is to comprehensively analyze the current situation of the residue detection methods, national and industrial standards of fluorescent brighteners in food paper packaging materials

[China Packaging News] food paper packaging material is a kind of packaging material that directly contacts with food, and its quality and safety is also the focus of public attention. The purpose of this paper is to comprehensively analyze the current situation of the residue detection methods, national and industrial standards of fluorescent brighteners in food paper packaging materials

problems in food paper packaging

in recent years, food safety issues have attracted wide public attention. With the progress of the times, people are not only concerned about the food itself, but also about the safety of food contact materials. The safety performance of food contact materials directly affects the quality of food. In order to maximize profits, some illegal traders do not hesitate to use waste recycled materials, and even add various illegal additives in the production and processing of food paper packaging materials to save costs and change the appearance. In october2010, the International Food Packaging Association announced the sampling results of various instant noodle barrels, milk tea cups, disposable paper cups and paper bowls sold and used in the market. The results showed that the content of fluorescent substances in the outer paper of double-layer paper products used by many well-known brands exceeded the standard

overview of fluorescent whitening agent

fluorescent whitening agent (FWAs) is an optical whitening agent. Its whitening principle is different from chemical oxidation whitening. Instead, it destroys the ultraviolet light in the environment by absorbing all kinds of non-human parts, emits blue purple fluorescence, and then overlaps with the yellow light emitted by the substrate that needs whitening to form white light, giving people the feeling of product whiteness and increasing the brightness of the product. This excellent feature of FWAs makes it widely used in textile, paper, synthetic detergent and other production fields. However, as FWAs is an organic compound with complex structure, once it binds with some proteins in the human body, it is difficult to be excreted through normal metabolism. At the same time, fluorescent whitening agents will weaken the human body's resistance, resulting in difficult wound healing. Once FWAs is enriched to a certain concentration in the human body, it may induce cancer. At present, there are about 15 categories of FWAs produced in the world (excluding related derivatives with fluorescence properties). According to their chemical structures, they can be divided into triazine aminostilbenes, pyrazolines, Naphthalimides, benzoxazoles and coumarins. At present, many domestic and foreign literatures have reported the abuse of FWAs in food packaging paper

detection of fluorescent brighteners in food packaging materials

there are many kinds of packaging materials in direct contact with food, mainly including plastic, paper and composite film bag packaging. Due to the high production cost of paper packaging materials but easy to recycle, there are many phenomena of using waste paper and recycled paper at present. In order to cover up the paper defects, improve the whiteness and improve the product appearance, illegal enterprises will add fluorescent brighteners in the process of use or pulp production. China's mandatory health standard hygienic standard hygienic standard for the use of additives for food containers and packaging materials (GB) clearly stipulates that the maximum use of FWAs 87 in paper is 0.30%, The domestic testing standard gb/t 5009 Db51/t and composite insights of ny/t India analyzed that most of the Global Aerospace Energy Industry 06 and other methods are simple qualitative methods, which can not accurately detect the content of fluorescent brighteners in samples. The EU en standard is a qualitative and semi quantitative detection method. To sum up, most of the current methods for detecting fluorescent brighteners are qualitative methods, and there is no quantitative detection method at the national and industrial standards

with the rapid development of the food industry, the development of food contact materials is also very rapid, and the use of additives and processing aids is also increasing year by year. According to the survey results, China's mandatory standard hygienic standard for base paper for food packaging (GB) has clearly stipulated that "no fluorescent brightener shall be added to food contact paper packaging, and no recycled raw materials shall be used in food contact paper cups". However, in this environment, fluorescent substances in food contact materials can be detected in the supervision and sampling inspection of some inspection and testing institutions, which also shows that, At present, China lacks the technical conditions for supervision, inspection and detection of such pollutants, so it is quite passive to supervise the quality and safety of such food contact materials. However, with the formulation of the limit of fluorescent brightener, the EU will gradually pay attention to the detection of such pollutants, which will have an important impact on China's future export trade of food and food packaging materials, Therefore, this paper simply analyzes the current situation and detection methods of fluorescent brighteners in food paper packaging materials, in order to provide guidance and support for the research of quantitative detection methods

Copyright © 2011 JIN SHI