Fluorimetric determination of aqueous formaldehyde employing heating and ultrasound-assisted approach through its derivatization with a ß-diketone-nickel(2+) complex immobilized in a PMMA flow cell.

Autor: de Araújo ALS; Department of Chemistry Federal Rural University of Pernambuco, UFRPE, Dom Manoel de Medeiros Street, S/N°, 52171-900, Recife, Pernambuco, Brazil., Cavalcante CO; Department of Fundamental Chemistry, Federal University of Pernambuco, UFPE, Av. Jornalista Anibal Fernandes, S/N, 50740-560, Recife, Pernambuco, Brazil., Lavorante AF; Department of Chemistry Federal Rural University of Pernambuco, UFRPE, Dom Manoel de Medeiros Street, S/N°, 52171-900, Recife, Pernambuco, Brazil., Silva WE; Department of Chemistry Federal Rural University of Pernambuco, UFRPE, Dom Manoel de Medeiros Street, S/N°, 52171-900, Recife, Pernambuco, Brazil., Belian MF; Department of Chemistry Federal Rural University of Pernambuco, UFRPE, Dom Manoel de Medeiros Street, S/N°, 52171-900, Recife, Pernambuco, Brazil. Electronic address: mfbelian@gmail.com.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2024 Apr 05; Vol. 310, pp. 123792. Date of Electronic Publication: 2023 Dec 29.
DOI: 10.1016/j.saa.2023.123792
Abstrakt: Formaldehyde (FA) is a highly toxic substance present in many matrices, including freshwater as well as found in natural mechanisms such as rainfall and combustion of organic matter. Consumption of water contaminated with high levels of FA can cause severe short-term or long-term health problems. Due to these health risks, procedures are necessary to determine and quantify FA in aqua sources This paper reports on a study of fluorimetric determination of FA using a nickel(2 + )-diketonate coordination compound immobilized as a solid precursor. The compound was characterized by electronic absorption, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetry (TG), optical microscopy (OM), and scanner electron microscopy (SEM). The methodology was based on the reaction of the synthesized compound with an ammoniacal buffer generating a selective reagent for formaldehyde: fluoral-P. The product of the reaction generates 3,5-diacetyl-1,4-dihydrolutidine (DDL), which is responsible for the fluorescence of the system. Several parameters such as temperature, duration of heating time, and dilution effect with the best effects were studied to carry out FA determination. Under the optimum experimental conditions, a linear response ranging from 1.0 to 10.0 mg/L FA (R = 0.997 and n = 10), and a detection (3σ criterion) and quantification (10 σ criterion) limit estimated at 0.129 and 0.389 mg/L, respectively were achieved. The FA analysis was able to be conducted in 05 min with a relative standard deviation estimated at 1.10 %.
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 © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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