Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for measuring cadmium in plastic sample

A measurement method and sample technology, which is applied in the field of system detection and analysis and testing, can solve the problems of high cost, long detection time, inability to apply plastic sample detection, etc., and achieve the effect of reduced loss and high recovery rate

Inactive Publication Date: 2012-06-20
INTERTEK GUANGZHOU TECH SERVICE
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the current technical problems such as long time-consuming detection, high cost, and inability to apply to the detection of various plastic samples

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring cadmium in plastic sample
  • Method for measuring cadmium in plastic sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Accurately weigh 0.1 g of the standard sample (PP-H, cadmium content of 92.3 mg / kg) in three times into a microwave digestion tank, add 10 mL of concentrated nitric acid, place the digestion tank in a microwave digestion instrument, and follow the set procedure The sample was subjected to microwave heating and digestion until the sample was completely dissolved. Take out the digestion tank, cool to room temperature, transfer the solution to a 25mL volumetric flask, dilute to the mark with water, and measure it with atomic absorption spectrometer (AAS) and inductively coupled plasma spectrometer (ICP) to measure the cadmium content and take The average value is used to calculate the recovery rate, and the data are as follows:

[0018]

example 2

[0020] Accurately weigh 0.1g of the standard sample (EC-681K, cadmium content of 137 mg / kg) in three times into a microwave digestion tank, add 10 mL of concentrated nitric acid, place the digestion tank in a microwave digestion instrument, follow the set procedure The sample was subjected to microwave heating and digestion until the sample was completely dissolved. Take out the digestion tank, cool to room temperature, transfer the solution to a 25mL volumetric flask, dilute to the mark with water, and measure it with atomic absorption spectrometer (AAS) and inductively coupled plasma spectrometer (ICP). Measure the cadmium content and take the average value to calculate the recovery rate, and the data are as follows:

[0021]

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 measuring cadmium in a plastic sample. The method comprises the following steps of: putting the weighed plastic sample into a microwave digestion tank, adding concentrated nitric acid for oxidation reduction, and digesting in a microwave digestion instrument to obtain a solution; transferring the digested solution to a volumetric flask for fixing a volume; and introducing the volume-fixed solution into a detection instrument, and measuring the content of an element to be analyzed. The plastic sample is pretreated by various methods such as temperature, pressure, oxidation reduction and the like, molecular structures of various plastic materials can be broken in a short time, the loss of the cadmium element is effectively reduced, the cadmium contained in the plastic sample is completely transferred to the liquid solution, and the method is convenient and quick and high in recovery rate.

Description

technical field [0001] The invention relates to a system detection and analysis test method, in particular to a method for determining the content of harmful substance cadmium in plastic samples. Background technique [0002] With the increasing consumption of consumer electronic products and the increasing awareness of environmental protection around the world, the successful marketing models and experiences brought by green products have enabled the industry to increase sales in addition to traditional methods such as price, quality, and service. A powerful marketing method - "environmentally friendly products". The "Waste Electronic and Electrical Equipment Directive" (WEEE-2002 / 96 / EC) amended by the European Union on January 27, 2003 clearly stipulates that manufacturers of consumer electronic products have the recycling, processing, Responsibility for reuse, with clearly defined goals and timing. For the recycling of waste electronic products, the European Union has f...

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): G01N21/31G01N21/71G01N1/44
Inventor 杨嘉杰张翼
Owner INTERTEK GUANGZHOU TECH SERVICE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com