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Related Concept Videos

Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...

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Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
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Published on: July 1, 2017

[Standard sample preparation method for quick determination of trace elements in plastic].

Wen-Qing Yao1, Rui-Long Zong, Yong-Fa Zhu

  • 1Department of Chemistry, Tsinghua University, Beijing 100084, China. yaowq@tsinghua.edu.cn

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|October 20, 2011
PubMed
Summary
This summary is machine-generated.

This study establishes a reliable method for preparing reference samples of heavy metals in electronic plastics using X-Ray Fluorescence spectroscopy. The method ensures accurate quantification of elements like mercury and lead, crucial for electronic waste analysis.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Environmental Science

Context:

  • Electronic information products contain regulated heavy metals and bromine.
  • Accurate quantification of these elements is essential for environmental and safety compliance.
  • Standardized reference materials are needed for validating analytical methods.

Purpose:

  • To develop and validate a masterbatch method for preparing reference samples of heavy metals and bromine in electronic plastics.
  • To establish the repeatability and precision of X-Ray Fluorescence spectroscopy (XRF) for analyzing these elements.
  • To create working curves and metrical methods for accurate quantification.

Summary:

  • A reference sample was prepared using the masterbatch method, incorporating known concentrations of heavy metals (Hg, Pb, Cr, Cd) and bromine (Br) in plastic.
  • X-Ray Fluorescence spectroscopy (XRF) was employed to determine the repeatability and uncertainty of the analysis.
  • The method demonstrated a good linear relationship for Hg, Pb, Cr, and Br in the 200-2000 mg x kg(-1) range and Cd in the 20-200 mg x kg(-1) range, with good repeatability over six analyses.
  • Validation using Mitsubishi Heavy Industry circuit boards showed results consistent with recommended values.

Impact:

  • Provides a validated method for preparing crucial reference materials for heavy metal analysis in electronic waste.
  • Enhances the accuracy and reliability of XRF analysis for regulatory compliance in the electronics industry.
  • Contributes to better environmental monitoring and management of hazardous substances in electronic products.