A simple method of the recovery of selenium from food samples for the determination by ICP-MS

Ohki, Akira; Nakajima, Tsunenori; Hirakawa, Shota; Hayashi, Kentaro; Takanashi, Hirokazu

doi:10.1016/j.microc.2015.10.012

Cited by 17 publications

(3 citation statements)

References 26 publications

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“…Análises de rotina e a detecção simultânea destes metais foram possíveis em função da eficiência da digestão ácida e o emprego de lâmpadas multielementares como fonte de energia para a emissão da radiação eletromagnética. 36 Já Ohki et al 37 utilizaram a mistura de HNO 3 e H 2 O 2 na digestão ácida de selenoproteínas em alimentos. Inicialmente, a proporção entre os reagentes, o efeito da temperatura e da pressão no procedimento de digestão ácida foram avaliados para a melhoria da eficiência de digestão e a posterior quantificação por ICP-MS.…”

Section: Métodos Espectrométricosunclassified

Compostos Orgânicos E Inorgânicos Contendo Selênio: Revisão De Métodos Analíticos E Perspectivas Para Análises Químicas

et al. 2017

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publicado na web em 13/11/2017 ORGANIC AND INORGANIC COMPOUNDS CONTAINING SELENIUM: ANALYTICAL METHODS REVIEW AND CHEMICAL ANALYSIS PERSPECTIVES. This article critically reviews the spectrometric, chromatographic and electroanalytical methods applied for the identification and quantification of organic and inorganic compounds containing Se and their applications in food, biological and natural water samples. The main characteristics, advantages and disadvantages of each analytical method are presented, and special attention is paid to sample preparation strategies prior to identification and quantification. Perspectives of research on new analytical procedures with improved speed, sensitivity, selectivity, accuracy, and mainly environmentally friendly, are also reported.Keywords: selenium; analytical determination; spectrometry; chromatography; electroanalysis; speciation. CONSIDERAÇÕES GERAISA magnífica máquina humana necessita de diversos nutrientes, os quais são o combustível para a manutenção do seu perfeito funcionamento. Dependendo das quantidades necessárias, estes nutrientes são classificados como macronutrientes (carboidratos, proteínas, lipídios e fibras) e micronutrientes (vitaminas e minerais). Estes compostos apresentam funções específicas e, consequentemente, diferentes concentrações ideais para o desempenho de suas funções metabólicas. A ingestão diária de nutrientes dependerá da composição química da dieta alimentar. 1Dentre os principais micronutrientes destacam-se ferro, zinco, cobre, selênio, cromo, iodo, molibdênio, manganês, silício, níquel, boro, vanádio, flúor, arsênio, alumínio, lítio e estanho, seja em suas formas orgânicas ou inorgânicas. Estes compostos desempenham suas respectivas atividades metabólicas quando presentes em concentrações abaixo de microgramas por grama (µg g -1 ). Entretanto, acima destas concentrações podem apresentar toxicidade ao organismo humano. 1 Selênio, apresentado com a sigla Se, é um micronutriente essencial para a dieta humana, em função das suas propriedades antioxidantes, auxiliando no retardamento do envelhecimento, no tratamento de doenças cardiovasculares e neoplasias, distrofia muscular, esclerose múltipla, osteoporose, reprodutividade, e desordem muscular.2,3 Alguns estudos indicam sua importância no metabolismo e funcionamento da tireóide e sua atuação no metabolismo dos ácidos graxos, juntamente com a vitamina E (α-tocoferol). 4,5 Assim, o Conselho Americano de Alimentação e Nutrição (Food and Nutrition Board, EUA), 6 recomenda a ingestão diária de 15 a 20 µg por dia, de 55 µg por dia e 70 µg por dia, para crianças, mulheres lactantes e outros adultos, respectivamente. Entretanto, o limite má-ximo de ingestão diário para uma pessoa adulta não deve ultrapassar 400 µg.A diferença entre a concentração essencial de Se, a deficiência ou a toxicidade é muito pequena. As concentrações ingeridas são fortemente dependentes do nível de concentração em alimentos e na quantidade de alimento ingerido.7 O consumo diário abaixo de 0,1 µg de Se por grama de aliment...

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Section: Métodos Espectrométricosunclassified

Compostos Orgânicos E Inorgânicos Contendo Selênio: Revisão De Métodos Analíticos E Perspectivas Para Análises Químicas

et al. 2017

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“…In literature, various instrumental methods such as inductively coupled plasma mass spectrometry (ICP-MS) [37,38], inductively coupled plasma optic emission spectrometry (ICP-OES) [39,40], electrothermal atomic absorption spectrometry (ETAAS) [6,41], and hydride generation-flame atomic absorption spectrometry (HG-FAAS) [42,43] have been used for the determination of selenium in different sample matrices. The determination of different chemical forms of elements at various concentrations is carried out in order to explain their toxicity, bioavailability, actual distribution, and bioaccumulation [44].…”

Section: Introductionmentioning

confidence: 99%

Determination of selenite and selenomethionine in kefir grains by reversed‐phase high‐performance liquid chromatography–inductively coupled plasma‐optical emission spectrometry

Bodur

Öner

Erarpat

et al. 2021

J of Separation Science

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A new and efficient reversed‐phase high‐performance liquid chromatography–inductively coupled plasma–optical emission spectrometry method was developed for the simultaneous separation and determination of SeO32– and seleno‐dl‐methionine in kefir grains. For the system, limits of detection and quantitation values for SeO32– and seleno‐dl‐methionine were calculated as 0.52/1.73 mg/kg (as Se) and 0.26/0.87 mg/kg (as Se), respectively. After performing the system analytical performance, recovery experiment was done for kefir grains and percent recovery results for SeO32– and seleno‐dl‐methionine were calculated as 98.4 ± 0.8% and 93.6 ± 1.0%, respectively. It followed by the feeding studies that the kefir grains were exposed to three different concentrations of SeO32– (20, 30, and 50 mg/kg) for approximately 4 days at room temperature to investigate the conversion/non‐conversion of SeO32– to seleno‐dl‐methionine. Next, the fed grains were extracted with tetramethylammonium hydroxide pentahydrate solution (20%, w/w) and then sent to the developed system. There was no detectable seleno‐dl‐methionine found in fed kefir grains at different concentrations of SeO32– while inorganic or elemental selenium in the fed kefir grains was determined between 1579.5 – 3116.0 mg/kg (as Se). Selenium species in the kefir grains samples was found in the form of SeO32– proved by using an anion exchange column.

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“…A flow injection technique has been described in literature where the oxidation reaction of 3 methyl-2benzothiazolinone hydrazone hydrochloride by selenite followed by coupling reaction with chromotropic acid has been used (Rekha et al, 2006). Apart from spectrophotometric methods, other methods of Se (IV) determination commonly employed include nuclear techniques (Alamin et al, 2006;Yusof, 1997), atomic absorption spectroscopy (Capelo et al, 2006;Hegedus et al, 2008) and inductively coupled mass spectrometry (Chen et al, 2007;Ohki et al, 2016;Jagtap & Maher, 2016), and voltammetry (Devi et al, 2017) etc.…”

Section: Introductionmentioning

confidence: 99%

An optical sensor for selenite determination in aqueous samples

Kulkarni

Ramekar²,

Kulkarni

2018

J Anal Sci Technol

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Background: In the present work, an optical sensor has been developed for the determination of selenium (IV) in aqueous samples. The optical sensor is a cellulose triacetate plasticized membrane with tri-octyl methyl ammonium chloride (Al-336) immobilized in it as an ion exchanger. Methods: The sensor works in two steps. In the first step, a 1 × 2 cm piece of the membrane is allowed to equilibrate with a known amount of selenium (IV) solution and potassium iodide in acidic medium. During this equilibration, the iodometric reaction takes place and, I 3 − (tri-iodide anion) is formed which gets sorbed into the membrane due to which the colorless film changes to yellow color showing an absorption maxima at 355 nm which is a characteristic of I 3 −. In the second step the I 3 − loaded membrane is allowed to equilibrate with a solution of variamine blue dye in presence of sodium acetate. In this step, oxidation of the dye takes place and the membrane shows a color change from yellow to violet and a shift in the absorption maxima from 355 to 550 nm. Results: The method is used to study the quantitative determination of selenium in aqueous samples, where the amount of selenium is varied and the corresponding absorbance at 550 nm is measured. A good linear curve is obtained in the concentration range of 0.2 to 3 μg mL −1 of selenium. Conclusions: The proposed method can be successfully applied to determination of selenium (IV) in various pharmaceutical and environmental samples.

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A simple method of the recovery of selenium from food samples for the determination by ICP-MS

Cited by 17 publications

References 26 publications

Compostos Orgânicos E Inorgânicos Contendo Selênio: Revisão De Métodos Analíticos E Perspectivas Para Análises Químicas

Compostos Orgânicos E Inorgânicos Contendo Selênio: Revisão De Métodos Analíticos E Perspectivas Para Análises Químicas

Determination of selenite and selenomethionine in kefir grains by reversed‐phase high‐performance liquid chromatography–inductively coupled plasma‐optical emission spectrometry

An optical sensor for selenite determination in aqueous samples

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