A new separation and preconcentration method for selenium in some foods using modified silica gel with 2,6-diamino-4-phenil-1,3,5-triazine

Mendil, Durali; Demirci, Zafer; Uluözlü, Özgür Doğan; Tüzen, Mustafa; Soylak, Mustafa

doi:10.1016/j.foodchem.2016.11.014

Cited by 37 publications

(13 citation statements)

References 23 publications

(28 reference statements)

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“…There are two challenges in current detection strategies: the effects of the matrix ions and the low concentration of Se in the food samples, which are below the detection limits of these instruments. 72 Therefore, separation and preconcentration procedures are necessary to improve the detection limit of Se and selectivity of these instrumental analytical techniques. Extraction of Se species from SePs was usually achieved with enzymatic hydrolysis, 73 which breaks the peptide bonds between amino acids within the protein structures and liberated Se species from protein bound to soluble forms.…”

Section: Identification Of Se In Proteins/peptidesmentioning

confidence: 99%

Section: Identification Of Se In Proteins/peptidesmentioning

confidence: 99%

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Selenium-Containing Proteins/Peptides from Plants: A Review on the Structures and Functions

Zhang

Xiang

et al. 2020

J. Agric. Food Chem.

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Selenium is an essential microelement required for biological processes. Traditional selenium supplements (selenite and selenomethionine mainly) remain concerns due to toxicity and bioavailability. In recent decades, biofortification strategies have been applied to produce selenium-enriched edible plants to address the challenges of superior nutritional quality requirements. Plant-derived selenium-containing proteins/peptides offer potential health benefits beyond the basic nutritional requirements of Se. Highly nucleophilic seleno-amino acids, special peptide sequences, and favorable bioavailability contribute to the biological activities of selenium-containing proteins/peptides, such as antioxidant, antihypertensive, anti-inflammatory, and immunomodulatory effects. However, their applications on a commercial scale are insufficient owing to the complexity of purification and identification techniques and the sparse information on bioavailability and metabolism. In this review, selenium status, structural features, bioactivities, structure−activity relationships, and bioavailability, as well as the mechanisms underlying the bioactivities and metabolism of plant-derived selenium-containing proteins/peptides, are summarized and discussed for their nutraceutical use.

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Section: Identification Of Se In Proteins/peptidesmentioning

confidence: 99%

Section: Identification Of Se In Proteins/peptidesmentioning

confidence: 99%

Selenium-Containing Proteins/Peptides from Plants: A Review on the Structures and Functions

Zhang

Xiang

et al. 2020

J. Agric. Food Chem.

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“…Further enhancement could be expected with the optimization of other parameters such as the ablation energy and the surface stability. The LOD obtained by the detection system can be greatly augmented in a complete system by choosing measurement strategies such as preconcentration and matrix/phase transfers, 30 whose applicability is highly dependent on the application.…”

Section: Optimal Plasma Conditions For Efficient Lif Detectionmentioning

confidence: 99%

Trace Selenium Measurement in Water Using Laser-Induced Fluorescence Assisted by Laser Ablation

et al. 2021

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Selenium detection and removal from industrial and mining effluents have gained attention recently due to the negative effects of this trace element on aquatic life. However, the current methods for the detection of selenium in effluents are off-line by nature. In order to fill this gap, we investigated the use of laser ablation-assisted laser-induced fluorescence (LA-LIF) to measure trace amount of selenium in aqueous solutions. LA-LIF measurements are real time, label-free, standoff, and require no consumables as well as no sample preparation. They can provide a field-amenable, versatile tool for the measurement of selenium in the whole water treatment chain. We describe the system utilized, the temporal and fluence optimization studies, and the resulting calibration curve, which is linear over a wide dynamic range from parts-per-billion to tens of parts-per-million concentration levels. We also show that the achieved limit of detection of selenium can reach 32 µg/L using LA-LIF, without any kind of preconcentration or matrix transfer.

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“…Assim, vários métodos analíticos têm sido estudados para sua determinação. Dentre as metodologias utilizadas na determinação deste elemento pode-se citar: espectrofotometria UV-Visível (WEN et al, 2014), absorção atômica com geração de hidreto (COELHO; BACCAN, 2004) e fluorescência atômica (WANG, et al, 2017); forno de grafite (MENDIL et al, 2017), cromatografia gasosa acoplada com espectrometria de massas (VRIENS et al, 2015), espectrometria de massa com fonte de plasma (MACLACHLAN et. al., 2016;BUNCH et al, 2017) e espectroscopia de raio X (QIN et al, 2017).…”

Section: Introductionunclassified

Estudo Da Quantificação De Selênio(iv) Empregando Detecção Espectrofotométrica

Gontijo¹,

Eiras²

2021

Enci Bio

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trabalho licenciado sob licença Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. RESUMOEstudos analíticos foram realizados para quantificação de selênio(IV) com 2,3diaminonaftaleno (DAN) em soluções fase única empregando determinação espectrofotométrica. As diferentes variáveis que influenciam a reação entre Se(IV) e DAN foram avaliadas e otimizadas em dois sistemas fase única através de técnicas quimiométricas. A metodologia em estudo apresentou limites de detecção de 0,07 e 0,03 mg L -1 de Se(IV) na fase aquosa dos sistemas fase única água-etanolclorofórmio e água-etanol-tolueno, respectivamente, com faixas lineares de 7,5 e 17 mg L -1 . PALAVRAS-CHAVE: 4,5-benzopiazoselenol; fase única; selênio. STUDY OF THE QUANTIFICATION OF Se(IV) USING SPECTROPHOTOMETRIC DETECTIONABSTRACT Analytical studies were performed to determine Se (IV) with 2,3-diaminonaphthalene (DAN) in single phase solutions using spectrophotometric detection. The different variables affecting the reaction between Se (IV) and DAN were studied in two single phase systems where the best conditions for complex formation 4,5benzopiazselenol (4,5-BPS) were found. For this study used chemometrics techniques of optimization. The detection limits obtained were 0.07 and 0.03 mg L -1 of Se (IV) in the aqueous portion of the single phase system water-ethanolchloroform and water-ethanol-toluene respectively, with linear ranges from 7.5 and 17 mg L -1 .

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A new separation and preconcentration method for selenium in some foods using modified silica gel with 2,6-diamino-4-phenil-1,3,5-triazine

Cited by 37 publications

References 23 publications

Selenium-Containing Proteins/Peptides from Plants: A Review on the Structures and Functions

Selenium-Containing Proteins/Peptides from Plants: A Review on the Structures and Functions

Trace Selenium Measurement in Water Using Laser-Induced Fluorescence Assisted by Laser Ablation

Estudo Da Quantificação De Selênio(iv) Empregando Detecção Espectrofotométrica

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