Research On Migration Regularity Of Ink Solvents In Composite Packaging Materials

This article is for composite packaging materials in the ink solvent residue migration research and analysis,in order to find out the influence of the quality and packaging of its food safety and hazards,providing scientific basis and decision-making reference for the ink risk monitoring and quality supervision.Firstly,by headspace gas chromatography-mass spectrometry(HS-GC-MS),to optimizate and screen the balance time and equilibrium heating temperature.It ablished the method of rapid and efficient extraction of residual solvent in packaging using the ink after printing composite packaging materials in the enterprise.Using headspace gas chromatography-mass spectrometry 16 kinds of solvent-based printing inks were carried out to detect and qualitative and quantitative analysis of residual solvents,inks sample test results show there are 15 kinds of detection of volatile organic compounds,which contain 12 kinds of benzene objects,BTEX detection rate up to 75%,ester solvents include ethyl acetate,propyl acetate,butyl acetate and amyl acetate.Using headspace gas chromatography-mass spectrometry after eight kinds of printing unused food bags to detect residual solvent and qualitative and quantitative analysis of the results showed that the results of eight kinds of commercial printing and packaging bags of residual solvent.Benzene solvent of the detection rate was 62.5%,wherein the detectable amount of toluene was 0.132 mg/m~2.Establish solid phase micro extraction technique commonly used in the ink solvent extraction method and GC-MS analysis method to select the best of the extraction head for the 50/30?mDVB/CAR/PDMS,optimal extraction time was 25min and thermal desorption temperature is 70?.With this method,commercially available small residual solvents in food sampling and qualitative analysis results show ketones,esters,benzene and other compounds foods contain.According to the test results of residual solvents in unused packets after ink print ed,choosing butanone,butyl acetate,toluene which have better detection and represe ntative as the research target.To study the factors affecting three ink solvent residues in packaging film and then analyzed.To print the six different packaging materials,Choose water-based liquid food simulation(distilled water),liquid acid simulation(3%,6%acetic acid),alcohol to simulate fluid(10%,40%ethanol)and fatty simulation(n-hexane),compare the migration behavior of change over time in different temperatu-re(room temperature of 23? and 40?).The results showed that,the residue ofButyl acetate on the packaging followed by n-hexane(0.011 mg/m~2)>3%acetic acid(0.009 mg/m~2)>10%ethanol(0.007 mg/m~2)>distilled water(0.005 mg/m~2),Compared with the residues of toluene,The residues of butyl acetate and ethyl ketone is smaller;For the amount of solvent to the migration of liquid food simulants,genera lly increase firstly and then back into balance.With the increase of temperature,themigration rate faster,migration amount is larger.When balance,the maximum migrati-on quantity of toluene to n-hexane is 40.2 mg/L.Calculating the partition coefficient K and the diffusion coefficient D according to Fick's second law of diffusion that the model needed,established the mathematical model of three kinds of solvents migration.The migration model of the solvent insingle packing material migration to the food simulation(?);Double migration model(?)layers of packaging material migration is more complicated,using mathematicalmodeling,select the optimal model:(?)b2x2+b3x3;Based on the coefficient of correction to the model of the single and double material,made the fitting correlation coefficient of the model and the migration results has larger ascension,to food packaging safety inspection,analysis and regulation has certain reference function.