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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.)

Multi-energy calibration as a strategy for elemental analysis of fertilizers by microwave-induced plasma optical emission spectrometry

Full text
Author(s):
Machado, Raquel C. [1, 2] ; Silva, Ana Beatriz S. [1, 2] ; Donati, George L. [3] ; Nogueira, Ana Rita A. [2]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Grp Appl Instrumental Anal, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Embrapa Pecuaria Sudeste, POB 339, BR-13560970 Sao Carlos, SP - Brazil
[3] Wake Forest Univ, Dept Chem, Salem Hall, POB 7486, Winston Salem, NC 27109 - USA
Total Affiliations: 3
Document type: Journal article
Source: Journal of Analytical Atomic Spectrometry; v. 33, n. 7, p. 1168-1172, JUL 2018.
Web of Science Citations: 16
Abstract

Multi-energy calibration (MEC) was applied for the determination of As, Ba, Cd, Cr, and Pb in fertilizer samples by microwave-induced plasma optical emission spectrometry. Commercial fertilizer samples and a certified reference material of mineral fertilizer (CRM NIST 695) were digested using microwave-assisted acid. The MEC approach was carried out using only two calibration solutions: S-1, composed of 50% v/v digested sample and 50% v/v standard reference solution containing the analytes, and S-2, composed of 50% v/v sample and 50% v/v blank solution. The accuracy of the method was evaluated by analyzing CRM NIST 695, with recoveries in the 96-101% range. Addition and recovery experiments were also carried out for Cd determination, with recoveries between 92 and 105% for the evaluated samples. The MEC strategy was compared with traditional external standard calibration and standard additions methods and was the only one to provide accurate results for all evaluated analytes. (AU)

FAPESP's process: 13/26672-5 - Development of procedures to As, Ba, Cd, Cr, Pb and Si determination in fertilizer samples by using microwave inductive plasma optical emission spectrometry (MIP OES)
Grantee:Raquel Cardoso Machado
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 15/14488-0 - Analytical method development for quality determination of fertilizers and tanning waste
Grantee:Ana Rita de Araujo Nogueira
Support Opportunities: Regular Research Grants