The Safety Evaluation Of Liquid Food Plastic Packaging Of Chang Sha

Food packaging is the last link of the modern food production, plays an important role in food quality and health protection, ease of storage and transportation, to promote sales, extend shelf life and improve the value of the goods. Food packaging is the most plastic of modern food production due to its good performance and low price have been widely used in food packaging, especially with the high-speed development of China’s beverage, dairy and liquid food industry, plastic packaging liquid food plays large market share. Food packaging is a modern food production the most in the process of plastic products to prolonged contact with food, some of the molecular substances by diffusion, the process of dissolution and dispersion into the food or food contents into the polymer, so that not only will affect the food flavor even cause some degree of harm to human health and the environment will. Therefore, it is necessary to the migration of the plastic packaging of liquid food market research so as to evaluate the safety of people’s daily lives, this has a practical significance.Food packaging is The modern food Health paper mainly selected PE and PET of two different materials for liquid food packaging materials, research in the case of water,4%acetic acid,10%ethanol and n-hexane simulation of four was the total migration; over time, temperature changes and mimics the total migration changes; selected the Changsha market on common representative of14kinds of liquid food packaging materials to research its total migration, research the migration of terephthalate of12PET materials the liquid food plastic packaging.Food packaging modern food raw total migration by the poor quality of the PET and PE material studied PET changes:PE in a different time, temperature and food simulants the total migration in four different food stimulants total migration of the total migration was greater than PET, and four food simulants in n-hexane, is7.5mg/dm2; PET and PE total migration of the two materials with the increase in temperature and time increase, increases to a certain value migration towards equilibrium, the shorter the time the higher the temperature tend to balance; the order of the size of the total migration of the two materials in different simulated species: n-hexane>4%acetic acid> water>10%ethanol.Using the national standard samples of two different materials Changsha market14consumption of potassium permanganate, the determination of the amount of evaporation residue, heavy metals (Pb), marking test trials, as well as PET material antimony content:PET and PE total migration in packaging materials increased with increasing time, slightly higher than that of PE bottles the PET increase the speed, but the increase in value is lower than PE bottles; The consumption of potassium permanganate in water,4%acetic acid and n-hexane three food simulants in descending order:PE>PET fatty foods>the acidic foods>Waterborne food; the aqueous food have no obvious difference in the order of consumption of potassium permanganate, in acidic foods generally as follows:an acidic beverage bottles carbonated beverage bottles> Tea beverage bottles, the fat mimetic in the potassium permanganate consumption is the largest, and its value6.8065mg/L, but less than the safety limit of10mg/L. The size of the order of the amount of evaporation residue PET and PE packaging materials:oily food packaging materials, the acidic food packaging material water-based food packaging materials, but its value is less than the safety limit of30mg/L, mimics the evaporation residue amount the size of the order: n-hexane>4%acetic acid> water;14kinds of liquid food plastic packaging container is not obvious heavy metal migration to a variety of food and no pigment migration to food;12PET material plastic packaging of liquid food occurred the inconspicuous antimony migration, but the concentration of antimony in acidic beverages significantly larger than the other.PLUC analysis method was established:column:C18,250mmX4.6mm (i.d.), particle diameter5um or equivalent; mobile phase:V (methanol):V (sodium acetate buffer solution) to15:85(pH=3.6);flow rate:1mL/min; Column temperature:room temperature; ultraviolet detector:wavelength242nm; injection volume:50uL; quantitative analysis of12kinds of PET material for liquid food packaging material of terephthalic acid obtained in12samples in addition to the oil bottle in trace amounts of phthalate migration, migration of0.001472mg/kg is far below the safety limit value7.5mg/kg other10samples were tested and found terephthalic acid; terephthalic acid average. The recovery rate is95.27%to100.67%, and the relative standard deviation is0.54%to2.07%. Selected from the above experiment can prove that:the experiments, the experimental materials are obvious migration does not occur, the14samples under30℃in food analog soaked after12months is still safe, no harm to human body.