Comparative analysis on homogeneity of Pb and Cd in
epoxy molding compounds
epoxy molding compounds
(1. Department of Chemistry, Sungkyunkwan University, Gyeonggi-do, Korea;
2. Department of Chemistry, Yonsei University, Seoul, Korea;
3. School of Materials Science and Engineering, Pusan National University, Busan 609-735, Korea)
2. Department of Chemistry, Yonsei University, Seoul, Korea;
3. School of Materials Science and Engineering, Pusan National University, Busan 609-735, Korea)
Abstract: Reference materials for quantitative determination of regulated heavy metals, such as Pb and Cd in electronic components, were designed and investigated in terms of stability and homogeneity. Reference materials with two concentration levels of heavy metals were prepared by spiking Pb and Cd compounds to epoxy molding compounds made by mixing silica powders and epoxy resin. The concentration changes of the reference materials during stability test for 1 a were not observed. In the homogeneity assessment, the as-prepared reference materials were studied by using three different analytical tools, inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray fluoroescence spectrometry (XRF) and laser ablation ICP mass. The results show different homogeneities by the characteristics of analytical tools and the materials.
Key words: epoxy molding compound; Pb; Cd; reference materials; homogeneity