Microwave-Assisted Solid Sampling Analysis Coupled to Flame Furnace Atomic Absorption Spectrometry for Cd and Pb Determination in Food-Contact Polymers

Alessandra Schneider Henn, Angelica Chaiani Frohlich, Matheus Felipe Pedrotti, Vitoria Hagemann Cauduro, Marcos Leandro Silva Oliveira, Erico Marlon de Moraes Flores and Cezar Augusto Bizzi
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Alessandra Schneider Henn: Departamento de Química, Universidade Federal de Santa Maria, Santa Maria 97105-900, Brazil
Angelica Chaiani Frohlich: Departamento de Química, Universidade Federal de Santa Maria, Santa Maria 97105-900, Brazil
Matheus Felipe Pedrotti: Departamento de Química, Universidade Federal de Santa Maria, Santa Maria 97105-900, Brazil
Vitoria Hagemann Cauduro: Departamento de Química, Universidade Federal de Santa Maria, Santa Maria 97105-900, Brazil
Marcos Leandro Silva Oliveira: Department of Civil and Environmental, Universidad de la Costa, Barranquilla 080002, Colombia
Erico Marlon de Moraes Flores: Departamento de Química, Universidade Federal de Santa Maria, Santa Maria 97105-900, Brazil
Cezar Augusto Bizzi: Departamento de Química, Universidade Federal de Santa Maria, Santa Maria 97105-900, Brazil

Sustainability, 2021, vol. 14, issue 1, 1-12

Abstract: Microwave-assisted solid sampling analysis coupled to flame furnace atomic absorption spectrometry (MW-SS-FF-AAS) was used for Cd and Pb determination in food-contact polymer samples, with the aim of minimizing reagents and laboratory waste. Operational parameters, such as the FF tube design, the oxygen flow rate, the flame stoichiometry, the sample mass, among others, were evaluated and optimized. Calibration was performed using only reference solutions, and the limits of quantification were 1.7 and 4.6 μg g −1 for Cd and Pb, respectively. Accuracy was assessed by the analysis of certified reference materials (CRMs), and by comparison with the results obtained by inductively coupled plasma mass spectrometry after microwave-assisted wet digestion. The MW-SS-FF-AAS results for the CRMs showed no statistical difference with the certified values, and good agreement was observed with the results of the digestion method. The MW-SS-FF-AAS method was considered suitable for Cd and Pb determination in food-contact polymers. The concentrations of Cd and Pb in the analyzed samples varied from <1.7 to 628 μg g −1 , and from <4.6 to 614 μg g −1 , respectively. As sample digestion is not necessary, the use of concentrated acids can be avoided by using the proposed MW-SS-FF-AAS method, greatly reducing waste generation.

Keywords: polymer analysis; MW-SS-FF-AAS; solid sampling; microwave-induced combustion; toxic element determination (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:14:y:2021:i:1:p:291-:d:712696

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