Multiway Calibration Strategies in Laser-Induced Breakdown Spectroscopy: A Proposal

Author(s)

Araujo, Alisson Silva ; Castro, Jeyne Pricylla ; Speranca, Marco Aurelio ; Andrade, Daniel Fernandes ; de Mello, Matheus Lima ; Pereira-Filho, Edenir Rodrigues

• Document type: Journal article
• Source: Analytical Chemistry; v. 93, n. 16, p. 10-pg., 2021-04-14.

Abstract

In this study, a new approach to laser-induced breakdown spectroscopy (LIBS) data modeling using multiway algorithms was investigated. Two case studies, parallel factor analysis (PARAFAC) and unfolded-partial least-squares with residual bilinearization (U-PLS/RBL) algorithms were used in (1) the determination of Al, Cu, and Fe in samples of reference material of printed circuit board (PCB) from electronic waste and (2) the determination of Ca, K, and Mg in samples of a human mineral supplement, where depth was used to obtain multidimensional data in the first case and delay-time in the second. In addition, univariate calibration was applied and compared with the multiway approaches. In all cases, the calibration data set was prepared from salts. PARAFAC showed satisfactory results in the first study, with low prediction errors and good accuracy for most samples, and the U-PLS/RBL algorithm presented the best performance for mineral supplement samples. (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 Opportunities: 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 Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/17221-8 - Composition evaluation of hard discs from electronic waste using spectroanalytical techniques: rare earth and noble metals determination
• Grantee: Jeyne Pricylla Castro Castilho
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 19/24223-5 - Calibration in Laser-Induced Breakdown Spectroscopy (LIBS): alternatives, challenges, proposals comparison and proposition of a universal procedure
• Grantee: Edenir Rodrigues Pereira Filho
• Support Opportunities: Regular Research Grants