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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Proposition of electronic waste as a reference material - part 2: homogeneity, stability, characterization, and uncertainties

Full text
Author(s):
Andrade, Daniel Fernandes [1] ; Machado, Raquel Cardoso [1] ; Pereira-Filho, Edenir Rodrigues [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chemist, Grp Appl Instrumental Anal, Rod Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Analytical Atomic Spectrometry; v. 34, n. 12, p. 2402-2410, DEC 1 2019.
Web of Science Citations: 0
Abstract

In many cases involving the management of technological materials, such as electronic waste, characterization is performed to determine the precise elemental composition, as well as to detect harmful elements and substances. However, this is hampered by the lack of suitable reference materials for electronic waste. In the present study, a newly developed reference material for electronic waste according to the requirements imposed by ISO Guides 30-35 is discussed. Homogeneity, stability and characterization studies were performed using microwave-assisted acid leaching (aqua regia 50% v/v) and inductively coupled plasma optical emission spectrometry (ICP OES) for determination of Ag, Al, As, Au, Ba, Cr, Cu, Fe, Ni, Pb, Sb, Si, Sn, and Zn. One-way analysis of variance (ANOVA) at the 95% confidence level and linear regression were used as statistical parameters to obtain the uncertainty contributions to characterization (u(char)), between-bottle homogeneity (u(bb)), and short-term (u(sts)) and long-term (u(lts)) stability tests. The results from the collaborative trial allowed the estimated mass fraction and associated uncertainty (U-RM) to be obtained for each element monitored. (AU)

FAPESP's process: 16/01513-0 - Laser-Induced Breakdown Spectroscopy (LIBS) application in the analyses of electronic waste (printed circuit boards and polymers), food and difficult preparation liquid samples
Grantee:Edenir Rodrigues Pereira Filho
Support type: Regular Research Grants
FAPESP's process: 16/17304-0 - Proposition of methods for direct analysis of electronic waste samples: determination of precious, strategic and toxic elements in printed circuits boards and LCD screens
Grantee:Daniel Fernandes de Andrade
Support type: Scholarships in Brazil - Doctorate