Determination of essential and trace elements in orange juice and dietary supplements using the LIBS technique

• Grant number: 14/11415-0
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): March 01, 2015
• Effective date (End): July 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Chemistry
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Edenir Rodrigues Pereira Filho
• Grantee: Amanda dos Santos Augusto
• Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated scholarship(s): 16/17443-0 - Combination of femtosecond laser ablation with chemometric tools for direct food sample analyses, BE.EP.DR

Abstract

This design focuses on developing procedures for the determination of elemental Ca, Cd, Cr, Cu, Fe, Mg, Pb and Zn in samples of orange juice, Ca, Cd, Cr, Cu, Fe, Mg, Pb, Se and Zn in food supplements for LIBS. The same samples are analyzed by LIBS are digested in acid and analyzed by ICP-OES and ICP-MS, the results are compared with the results obtained by LIBS to verify the accuracy of the analytical method proposed. Use of cellulose as a base for the production of solid standards and multivariate calibration: For determinations LIBS calibration methods as will be studied. For the analysis of samples of orange juice will be employed the method of dispersive liquid-liquid microextraction (DLLME), this process will include the use of Chemometrics (factorial design) to optimize the analytical conditions and identify the best working condition. Chemometric tools are also employed to generate calibration models and sort order for the expeditious determination of the analytes in the samples under study and classification of the same for the levels of analytes. It is expected that the results obtained it is possible to establish a method for fast analysis and easy to apply with little or no preparation of the samples tested. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

AUGUSTO, AMANDA S.; CASTRO, JEYNE P.; SPERANCA, MARCO A.; PEREIRA-FILHO, EDENIR R. Combination of Multi-Energy Calibration (MEC) and Laser-Induced Breakdown Spectroscopy (LIBS) for Dietary Supplements Analysis and Determination of Ca, Mg and K. Journal of the Brazilian Chemical Society, v. 30, n. 4, p. 804-812, APR 2019. Web of Science Citations: 5.

VINICIUS C. COSTA; AMANDA S. AUGUSTO; JEYNE P. CASTRO; RAQUEL C. MACHADO; DANIEL F. ANDRADE; DIEGO V. BABOS; MARCO A. SPERANÇA; RAIMUNDO R. GAMELA; EDENIR R. PEREIRA-FILHO. LASER INDUCED-BREAKDOWN SPECTROSCOPY (LIBS): HISTÓRICO, FUNDAMENTOS, APLICAÇÕES E POTENCIALIDADES. Química Nova, v. 42, n. 5, p. 527-545, Maio 2019.

AUGUSTO, AMANDA DOS SANTOS; SPERANCA, MARCO AURELIO; ANDRADE, DANIEL FERNANDES; PEREIRA-FILHO, EDENIR RODRIGUES. Nutrient and Contaminant Quantification in Solid and Liquid Food Samples Using Laser-Ablation Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS): Discussion of Calibration Strategies. FOOD ANALYTICAL METHODS, v. 10, n. 5, p. 1515-1522, MAY 2017. Web of Science Citations: 7.

AUGUSTO, AMANDA DOS SANTOS; BARSANELLI, PAULO LOPES; VERBI PEREIRA, FABIOLA MANHAS; PEREIRA-FILHO, EDENIR RODRIGUES. Calibration strategies for the direct determination of Ca, K, and Mg in commercial samples of powdered milk and solid dietary supplements using laser-induced breakdown spectroscopy (LIBS). Food Research International, v. 94, p. 72-78, APR 2017. Web of Science Citations: 23.