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

Autor(es)

Andrade, Daniel Fernandes ^[1] ; Machado, Raquel Cardoso ^[1] ; Pereira-Filho, Edenir Rodrigues ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chemist, Grp Appl Instrumental Anal, Rod Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Analytical Atomic Spectrometry; v. 34, n. 12, p. 2402-2410, DEC 1 2019.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 16/01513-0 - Combinação de LIBS (Laser-Induced Breakdown Spectroscopy) e ICP OES (Inductively Coupled Plasma Optical Emission Spectrometry) na análise de amostras de resíduo eletrônico (circuito eletrônico e polímeros), alimentos e líquidas de difícil preparação
• Beneficiário: Edenir Rodrigues Pereira Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/17304-0 - Proposição de métodos para a análise direta de amostras de lixo eletrônico: determinação de elementos preciosos, estratégicos e tóxicos em circuitos eletrônicos e telas touch screen
• Beneficiário: Daniel Fernandes de Andrade
• Modalidade de apoio: Bolsas no Brasil - Doutorado