This article focuses on the issue of limiting the amount of harmful heavy metals in packaging inks, analyzes the analytical techniques for the detection of harmful heavy metal content in packaging products, and points out the main reasons for unqualified packaging products, and proposes the development of environmentally friendly packaging inks as soon as possible to enhance the packaging of harmful heavy metals, and the Az dyes, formaldehyde, ozone layer depletion substances and other environmental protection items are recommended for testing. I. Introduction 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, which has aroused the attention of the world packaging industry, including the packaging industry in China, and will result in 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 ordinance. The influence of harmful heavy metals (lead Pb, cadmium Cd, mercury Hg, chromium Cr6+) in packaging and packaging inks on China's packaging products, especially export packaging, and the measures to 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 on the evaluation of 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, which makes exporting companies more troublesome and causes unnecessary losses. Combining the results of detection of harmful heavy metals in packaging products and inks, the packaging manufacturing companies, testing organizations and related departments were able to understand the detection status of harmful heavy metals in our ink products. The company's various testing technologies are based on international standards. The detection of heavy metals in ink products is generally detected by atomic absorption spectrometry. Second, the provisions of the packaging regulations on harmful heavy metals ink The EU Packaging Act was implemented on June 30, 1996. With regard to the limits of hazardous heavy metals (Pb, Cd, Hg, Cr6+) in packaging and ink, the packaging ordinance stipulates that: 2 years after the implementation of the Packaging Act, the total amount of Pb, Cd, Hg and Cr6+ shall not exceed 600 mg/kg. After 3 years of the implementation of the Packaging Act, the total amount of Pb, Cd, Hg and Cr6+ shall not exceed 250 mg/kg. The total amount of Pb, Cd, Hg and Cr6+ does not exceed 100 mg/kg. The 94/62/EC Packaging Act is further developed based on the relevant packaging regulations of the EU Packaging and Environmental Regulations. Its main purpose is 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, coatings, adhesives, stabilizers, and films, in order to reduce or completely eliminate the heavy metal content of the packaging materials. Encourage the use of water-based materials, from solvent to water-based transfer, such as the use of water-based inks, limiting halogen and other dangerous substances, limiting the use of chlorine bleached packaging materials for food packaging. Third, the harmful harm of heavy metals to the environment and human body Among the metallic elements, the more toxic are the heavy metals and their compounds, while Pb, Cd, Hg and Cr are harmful heavy metals that are often encountered in the production and living environment. 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 nature, especially in water and soil, causing disturbances to the ecosystem and causing disturbances. 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 Pb, The main cause of Cd, Hg, Cr. Fourth, atomic absorption spectrometry technology Atomic Absorption Spectroscopy (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 qualitative analysis of inorganic elements. It has become the main method for quantitative analysis of inorganic compounds. Atomic Absorption Spectrometry (AAS) is based on the resonance absorption of the characteristic radiation of the measured element emitted by the light source, based on the ground state of the measured element in the vapor phase of the sample to be measured, and is determined in the sample 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. Author: Ren Min poetry