Abstract
A novel 1-hydroxy-2,4-diformylnaphthalene-based fluorescent probe L was synthesized by a Knoevenagel reaction and exhibited excellent sensitivity and selectivity towards sulfite ions (SO32−) and bisulfite ions (HSO3−). The detection limits of the probe L were 0.24 μM using UV-Vis spectroscopy and 9.93 nM using fluorescence spectroscopy, respectively. Furthermore, the fluorescent probe L could be utilized for detection in real water samples with satisfactory recoveries in the range 99.20%~104.30% in lake water and 100.00%~104.80% in tap water by UV-Vis absorption spectrometry, and in the range 100.50%~108.60% in lake water and 102.70%~103.80% in tap water by fluorescence spectrophotometry.
Highlights
IntroductionMolecules 2021, 26, 3064. https://Levels of anions including organic and inorganic anions (such as sulfurous acid root, amino acids, etc.) are of interest to the field of food analysis, yet they widely exist in food, and can be used as food additives by being externally added to the food
Molecules 2021, 26, 3064. https://Levels of anions including organic and inorganic anions are of interest to the field of food analysis, yet they widely exist in food, and can be used as food additives by being externally added to the food
The molecular structure was characterized by 1 H NMR spectroscopy, HRMS and single crystal X-ray diffraction
Summary
Molecules 2021, 26, 3064. https://Levels of anions including organic and inorganic anions (such as sulfurous acid root, amino acids, etc.) are of interest to the field of food analysis, yet they widely exist in food, and can be used as food additives by being externally added to the food. During the food production process, contamination can accidentally arise during one or even several stages, which could result in excessive amounts of anions in the food These anions affect the color, aroma, taste and other qualities of food, but can play an important role in the health effect of food. In order to evaluate food quality and safety quickly and accurately, it is necessary to carry out qualitative and quantitative analysis of anions with the help of effective analytical testing methods This is required in order to provide a scientific basis for food production technology, food storage management and monitoring, as well as adherence to the corresponding rules and regulations [1]. One of the main atmospheric pollutants is sulfur dioxide (SO2 ) in the physiological environment, and this results in sulfite in treatments with an aqueous base
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