Method for determining phthalates substance in plastic package material

Abstract

The invention discloses a method for determining a phthalates substance in a plastic package material. The method comprises the following steps: 1) preparing a standard solution: respectively taking 0.1 mL of a phthalate standard stock solution in a volumetric flask with volume of 5 ml and metering the volume by hexane, preparing 100.0 mg / L of a phthalate mixing standard solution in a refrigerator at the temperature of 0-4 DEG C for storage; 2) extracting a sample: weighing 0.5 g of a crushed plastic packaging bag sample, placing the sample in a 5 mL of centrifugation test tube, adding absolute ethyl alcohol and uniformly mixing the materials, performing ultrasonic extraction for 30 min, centrifuging the material, taking an upper layer clear liquid, dumping the residues; and 3) employing a chromatographic instrument for separating and analysis on the sample. The method employs ultrasound-assisted absolute ethyl alcohol extraction, a plurality of purifying technologies of low temperature processing and solid phase extraction are combined, matrix interference is effectively reduced, and the extraction effect is good.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to the determination of phthalate substances in plastic packaging materials. Background technique [0002] Food packaging is the last link to ensure food safety. Due to its direct contact with food, many of its components migrate into the food and cause pollution. Phthalates are one of them. As an ideal plasticizer, phthalate is widely used in food packaging, medical blood bags, beverage packaging and other plastic products, and the mass fraction of plasticizers in plastics can be as high as 20%- 30%. In the past, PAEs were considered to be low or non-toxic, so their use in industrial production was unlimited. But recent research results show that phthalates are an environmental estrogen, they can disrupt the normal function of the endocrine system, and can cause harm to undamaged organs or their offspring. Summary of the invention [0003] The purpose of the present invention is to pr...

AI Technical Summary

Problems solved by technology

But recent research results show that phthalates are an environmental estrogen, they can disrupt the normal function of the endocrine system, and can cause harm to undamaged organs or their offspring