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Editor in Chief: RAFFAELLO COSSU

CHEMICAL EXPLORATORY ANALYSIS OF PRINTED CIRCUIT BOARD (PCB) USING INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY (ICP OES): DATA TREATMENT AND ELEMENTS CORRELATION

  • Jeyne Castro - Group of Applied Instrumental Analysis, Chemistry Department, Federal University of São Carlos, Brazil
  • Rodrigues Pereira-Filho Edenir - Group of Applied Instrumental Analysis, Chemistry Department, Federal University of São Carlos, Brazil

DOI 10.31025/2611-4135/2020.14039

Released under CC BY-NC-ND

Copyright: © 2020 CISA Publisher

Editorial History

  • Received: 27 Apr 2020
  • Revised: 27 Jul 2020
  • Accepted: 24 Aug 2020
  • Available online: 28 Dec 2020

Abstract

Electronic waste is the fastest growing class of residue in the world. This material presents several electric and electronic equipment (EEE) with a huge amount of base, valuable and toxic elements, thus increasing its recycling interest. This study is aimed to perform an exploratory analysis of printed circuit board (PCB) using Inductively coupled plasma optical emission spectrometry (ICP OES). A PCB from hard disk (HD) was split in 77 sub-samples using a lathe following by mineralization process. This step was conducted without milling process. So, the sub-samples were weighted and mixed with concentrated aqua regia solution, followed by mineralization using microwave oven radiation. Twenty elements were determined by ICP OES (Al, Au, Ba, Ca, Co, Cr, Cu, Fe, Mg, Mn, Nd, Ni, Pb, Pd, Pt, Sb, Sn, Ti and Zn), and Flame atomic absorption spectrometry - FAAS (Ag). With the concentration results, several graphical analyzes were performed: (1) scores map and loading plot; (2) correlation plot and; (3) PCB element distribution maps. With this exploratory analysis, it was possible visualize and understand the data, observing correlations among the elements, how close these correlations are and how is this correlation around the PCB components. This strategy was a good way to observe the PCB complexity and the importance of recycling these materials.

Keywords


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