Microwave-induced combustion for further determination of potentially toxic elements in honey by ICP-MS

• Published in: Analytical and bioanalytical chemistry 2024-05, Vol.416 (11), p.2859-2870
• Main Authors: Cauduro, Vitoria H., Alves, Camila M. A. C., Nascimento, Mariele S., Druzian, Gabriel T., Balbinot, Fernanda P., Mesko, Marcia F., Flores, Erico M. M.
• Format: Article
• Language: English
• Subjects: Ammonium nitrate; Analytical Chemistry; atomic absorption spectrometry; Biochemistry; Carbon; Cellulose; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Combustion; Crystalline cellulose; Decomposition; Decomposition reactions; Digestion; Elemental Mass Spectrometry for Bioanalysis; Food products; Food Science; Geographical distribution; Honey; Inductively coupled plasma mass spectrometry; Laboratory Medicine; Lead; Mass spectrometry; Mass spectroscopy; Mercury (metal); Methods; microwave treatment; Mollusks; Monitoring/Environmental Analysis; Reagents; Research Paper; Scientific imaging; toxicity
• ISSN: 1618-2642; 1618-2650; 1618-2650
• DOI: 10.1007/s00216-024-05235-7

Microwave-induced combustion (MIC) was proposed in this study for honey decomposition aiming for As, Cd, Hg, and Pb determination by inductively coupled plasma mass spectrometry (ICP-MS). Sample mass (up to 1.0 g), absorbing solution (0.5 to 14.4 mol L −1 HNO 3 , and H 2 O), heating program, and combustion aids were evaluated. The Eurachem guidelines were used for method validation. The proposed method enabled combustion of a high sample mass (0.8 g of honey, with 0.4 g of microcrystalline cellulose and 100 µL of 6 mol L −1 NH 4 NO 3 ) using 6 mL of an absorbing solution consisting of 1 mol L −1 HNO 3 , which resulted in low residual carbon in solution (