Method for determining phthalates substance in plastic package material

A technology of phthalates and phthalic acid, which is applied in the field of determination of phthalates, can solve the problems of disturbing the normal function of the endocrine system and organ damage, and achieve good extraction effect and reduce interference. Effect

Inactive Publication Date: 2017-01-11
DALIAN RUIXIANDA PLASTIC CO LTD
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But recent research results show that phthalates are an environmental estrogen, they can disrupt th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] The present invention will be further explained below in conjunction with specific embodiments.

[0008] Determination of phthalates in plastic packaging materials, 1) Preparation of standard solution: Pipette 0.1mL from the standard stock solution of phthalate into a 5ml volumetric flask and use n-hexane to make the volume 100.0 The mg / L phthalate mixed standard solution is stored in the refrigerator at 0-4℃; 2) Sample extraction: Weigh 0.5 g of the crushed plastic bag sample, place it in a 5 mL centrifuge tube, and add no Mix water and ethanol, extract with ultrasonic for 30min, centrifuge, pipette the supernatant, and discard the residue; 3) Separate and analyze the sample with a chromatograph. The residue was extracted with 5 mL of absolute ethanol, and the extraction procedure was the same as that in claim 1. All the supernatants were transferred and combined.

[0009] The above are only the preferred specific embodiments of the present invention, but the protection sc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N30/06
Inventor 梁继鹏
Owner DALIAN RUIXIANDA PLASTIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap