Simultaneous reflectance and fluorescence measurements for portable formaldehyde determination in milk using a multi-channel spectrometer sensor.

Autor: Cadeado ANS; Federal University of Uberlândia, Institute of Chemistry, 2121 João Naves de Ávila Avenue, Santa Mônica, Uberlândia MG38400-902, Brazil; Department of Science and Technology, Licungo University, Quelimane, Mozambique., Machado CCS; Federal University of Uberlândia, Institute of Chemistry, 2121 João Naves de Ávila Avenue, Santa Mônica, Uberlândia MG38400-902, Brazil., Silva SG; Federal University of Uberlândia, Institute of Chemistry, 2121 João Naves de Ávila Avenue, Santa Mônica, Uberlândia MG38400-902, Brazil. Electronic address: sidgon@ufu.br.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2025 Feb 01; Vol. 464 (Pt 1), pp. 141583. Date of Electronic Publication: 2024 Oct 11.
DOI: 10.1016/j.foodchem.2024.141583
Abstrakt: This study introduces a novel optical method for formaldehyde determination in milk, based on the hypothesis that simultaneous reflectance and fluorescence measurements can enhance detection sensitivity compared to traditional methods. We aimed to address the challenge of accurately measuring low concentrations of formaldehyde in milk, a crucial issue for food safety. By employing a multi-channel spectrometer sensor and exploiting the reaction of formaldehyde with acetylacetone to form 3,5-diacetyl-1,4-dihydrolutidine (DDL), we measured reflectance of DDL at 415 nm and fluorescence at 515 nm. The method demonstrated linearity (0.1-4 mg L -1 for reflectance, 0.1-3 mg L -1 for fluorescence) with detection limits of 0.027 mg L -1 (reflectance) and 0.030 mg L -1 (fluorescence). We successfully determined formaldehyde in milk samples (46 to 114 μg L -1 ) and observed a 60 % reduction in formaldehyde concentrations. This research underscores the importance of heat treatment in ensuring food safety.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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