Simple Time-Saving Method for Iron Determination Based on Fluorescence Quenching of an Azaflavanon-3-ol Compound

Abstract

A simple and time-saving spectrofluorometric method developed using an azaflavanon-3-ol compound was used for the determination of iron in various food samples. Nitric acid and hydrogen peroxide were used for digestion of samples in a closed microwave system. The method was validated by analyzing two certified reference materials (CRM-SA-C Sandy Soil C and Mixed Polish Herbs INCT-MPH-2). Measurements were carried out using a modified standard addition method. The standard addition graph was linear until 21.6 mg/L in the determination of iron(III). Detection and quantification limits were 0.81 and 2.4 mg/L, respectively. Satisfactory accuracy was obtained for spinach, dill, mint, purslane, rocket, red lentils, dry beans, and two iron medicinal tablets. High recoveries were found for streamwater samples fortified at three different concentrations. The method is simple, time-saving, cost-effective, and suitable for the determination of the iron content of foods.

Fluorescent Porous Carbazole‐Decorated Copolymer Monodisperse Microspheres: Facile synthesis, Selective and Recyclable Detection of Iron (III) in Aqueous Medium

“…It indicates that both static and dynamic quenching existed in the system . Dynamic quenching is a kind of collisional quenching, and quenching efficiency increases with increasing temperature . Figure S9 shows the temperature effect on Stern–Volmer graph.…”

Naked Eye Detection of Carbonate, Hydroxide, and Cyanide Ions with 1,4′‐Diazaflavonium Bromides: A Simple Spectrophotometric Method for Cyanide Determination

“…Recently, we focused to investigate fluorescence properties of some synthetic flavonoid compounds to use them as analytical reagents . It has been envisaged that these compounds may be green reagents due to their similar structures to natural flavonoid compounds.…”

“…It has been envisaged that these compounds may be green reagents due to their similar structures to natural flavonoid compounds. Therefore, a chalcone compound and an azaflavanon‐3‐ol compound as fluorescent reagents were used in iron determination in real samples. As a continuation of those studies, the present study focuses on revealing ion sensor properties of the 1,4‐diazaflavonium bromides.…”

Discriminating Chemosensor for Detection of Fe3+ in Aqueous Media by Fluorescence Quenching Methodology

“…6,7 Therefore, in order to develop an easy, simple, economical, highly selective, and sensitive response method is a challenging task. 14,15 Iron can exist in oxidation states between −2 and +7, but the most common oxidation states of iron are ferrous (+2) and ferric (+3) states. [8][9][10] Amongst numerous methods used so far for the detection of a metal ion in aqueous solutions, fluorescent sensors with selective and sensitive characteristics are best candidates for onsite quantitative determination of metal ions from ordinary and pharmaceutical samples.…”

“…It is well known that iron is the fourth most important transition metal ion in biological systems . Iron can exist in oxidation states between −2 and +7, but the most common oxidation states of iron are ferrous (+2) and ferric (+3) states.…”