The problem of harmful heavy metals in ink

The European Union's 94/62/EC "Packaging and Packaging Waste Act" (the "Packaging Act") has been issued and implemented since the end of 1994. It has aroused the attention of the world packaging industry, including the packaging industry in China, and will produce the development of the packaging industry. profound influence. The relevant domestic industries refer to this ordinance as the "green barrier" set by the European Union. Many scholars commented on the decree. These comments focus more on the reduction, recycling and recycling of packaging waste, and on the packaging ordinances. The impact of harmful heavy metals (lead, cadmium, mercury, and chromium) in packaging and packaging inks on China's packaging products, especially export packaging, and the measures that should be taken to illustrate the detection analysis are few. The reason is mainly that the harmful effects of harmful heavy metals in packaging products and inks on the environment are not paid enough attention, and there is no relevant data to evaluate the level of harmful heavy metals in domestic packaging products. At present, foreign importers are demanding more and more data on the detection of harmful heavy metals in packaged products. Some companies are extremely troublesome and cause unnecessary losses. In order to make the packaging production companies, testing agencies and related departments understand the current status of detection of harmful heavy metals in ink products, we hereby make the following instructions.
First, the provisions of the packaging regulations on harmful heavy metals ink
The European Union Packaging Act has been implemented. With regard to the restrictions on harmful heavy metals (lead, cadmium, mercury, and chromium) in packaging and ink, the Packaging Act states:
Two years after the implementation of the Packaging Act, the total amount of lead, cadmium, mercury, and chromium does not exceed 600 mg/kg. After 3 years of implementation of the Packaging Act, the total amount of lead, cadmium, mercury, and chromium does not exceed 250 mg/kg. Five years after the implementation of the Packaging Act, The total amount of lead, cadmium, mercury, and chromium does not exceed 100 mg/kg.
The 94/62/EC packaging decree was further developed based on the packaging regulations related to EU packaging and environmental regulations, and its main purpose was to promote the collection and use of packaging, control the number of packaging, and improve the quality of packaging. In addition to limiting the content of the above four kinds of harmful heavy metals, it is also required to limit the amount of auxiliary materials for packaging such as inks, dyes, paints, adhesives, stabilizers, and films to reduce or completely eliminate the heavy metal content of the packaging materials. Encourage the use of water-based inks, limit halogens and other hazardous substances, and restrict the use of chlorine bleached packaging materials for food packaging.
Second, the harm of heavy metals to the environment and human body caused by ink
Among the metal elements, the more toxic are the heavy metals and their compounds, while lead, cadmium, mercury, and chromium are harmful heavy metals often encountered in production and living environments. The harmful heavy metal pollution has great harm to the environment and humans. The human body cannot excrete harmful heavy metals accumulated in the food chain or other ways through its own metabolism. The basic chemical processes in the food chain of the environment and the accumulation and accumulation of harmful heavy metals in the environment, from low-grade microorganisms to small aquatic animals, and finally transmitted and enriched to the top of the biological chain—the carnivorous animals, resulting in harmful heavy metals in the human body. Enrichment. In the course of recycling or natural degradation of packaging products and their waste, harmful heavy metals and some other chemical substances infiltrate into the environment and accumulate and accumulate in the natural world, especially in the soil and water, causing disturbance to the ecosystem and thus becoming a disturbance. Human health disorders will ultimately directly threaten human security and survival.
At the same time, when harmful heavy metals in packaged products exceed a certain limit, they may adversely affect the recycling of packaged products, which may complicate the recycling process and may even hinder the reuse of recycled packaging products. These are packaging regulations that limit harmful heavy metals Hg, Main factors such as Cr.
Third, the detection method - atomic absorption spectrometry technology
Atomic Absorption Spectrometry (AAS) is a new type of instrumental analysis method established in the 1950s. It is complementary to atomic emission spectrometry, which is mainly used for the qualitative analysis of inorganic elements. It has become the main method for the quantitative analysis of inorganic compounds. Atomic Absorption Spectrometry is based on the resonance of the characteristic radiation of the measured element emitted by the light source based on the ground state atoms of the measured element in the vapor phase of the sample to be measured, and is obtained by measuring the degree of attenuation of the radiation. The content of the tested element. Its main function is to determine the content of metal and non-metal elements in various inorganic and organic samples. Due to its high sensitivity, fast analysis speed, simple instrument composition, and easy operation, this method has been widely used, especially for trace analysis and trace analysis.