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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.)

Neodymium determination in hard drive disks magnets using different calibration approaches for wavelength dispersive X-ray fluorescence

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Author(s):
Castro, Jeyne Pricylla [1] ; Speranca, Marco Aurelio [1] ; Babos, Diego Victor [1] ; Andrade, Daniel Fernandes [1] ; Pereira-Filho, Edenir Rodrigues [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Chem Dept, Grp Appl Instrumental Anal, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY; v. 164, FEB 2020.
Web of Science Citations: 0
Abstract

Due to matrix effects and limitations in the calibration process for direct analysis of solids, the search for different calibration approaches is very important. This study is aimed to Nd determination in high-performance magnets from hard disk using direct solid analysis by wavelength dispersive X-ray fluorescence. Three univariate calibration methods were evaluated: multi-energy calibration, one-point gravimetric standard addition and two-point calibration transfer. These strategies employ an efficient matrix-matching method, minimizing the matrix effects related to the direct analysis of solids. The trueness values were calculated according to reference concentration by inductively coupled plasma optical emission spectrometry and the concentration obtained by univariate models. For almost all samples, the trueness values were within an acceptable range from 80 to 120%. Besides that, relative standard deviation values ranged from 3 to 27% for all cases and, the standard error ranged from 2 to 6% w w(-1) Nd among the calibration methods. These parameters show the potential of these alternative calibration methods over traditional ones. (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
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 de Castro
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/17753-5 - Laser-Induced Breakdown Spectroscopy (LIBS) and chemometric tools: simulation of direct hard disk printed circuit board fragments analysis and sorting
Grantee:Jeyne Pricylla de Castro
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 14/22408-4 - Use of Laser-Induced Breakdown Spectroscopy (LIBS) for direct alloys analyses
Grantee:Jeyne Pricylla de Castro
Support type: Scholarships in Brazil - Master
FAPESP's process: 12/01769-3 - Development of spectroanalytical methods for direct analysis of waste electrical and electronic equipments and cosmetics
Grantee:Edenir Rodrigues Pereira Filho
Support type: Regular Research Grants