Headspace solid-phase microextraction for the determination of volatile organic sulphur and selenium compounds in beers, wines and spirits using gas chromatography and atomic emission detection

Campillo, Natalia; Peñalver, Rosa; López-Garcı́a, Ignacio; Hernández‐Córdoba, Manuel

doi:10.1016/j.chroma.2009.08.019

Cited by 80 publications

(50 citation statements)

References 32 publications

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“…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.…”

Section: Considerações Geraisunclassified

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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: Considerações Geraisunclassified

“…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.…”

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

et al. 2017

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“…Although solid-phase extraction (SPE) is the most popular method of extracting organics from aqueous samples, SPME has various advantages over SPE, such as a shorter extraction time, a smaller sample volume, solvent-free extraction, and higher enrichment efficiency. As it is a rapid, sensitive, and economical method [6], SPME has been widely applied in environmental testing [7], biological analysis [8], drug monitoring [9], and food testing [10]. However, commercial SPME fibers are costly and have some disadvantages, including low thermal and chemical stability, coating fragility, it is relatively easy to strip off the coating, and they have a tendency to expand in organic solvents [11].…”

Section: Introductionmentioning

confidence: 99%

In-situ hydrothermal synthesis of titanium dioxide nanorods on titanium wire for solid-phase microextraction of polycyclic aromatic hydrocarbons

Tian

Feng

et al. 2017

Anal Bioanal Chem

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Titanium dioxide nanorods were prepared on the surface of titanium wire by hydrothermal synthesis for use as a solid-phase microextraction (SPME) fiber. The morphology of the SPME coating was observed by scanning electron microscopy (SEM). Employed in conjunction with gas chromatography (GC), the fiber was investigated with five polycyclic aromatic hydrocarbons (PAHs) and three terphenyls in direct-immersion extraction mode. Various parameters were optimized, such as the extraction time, the stirring rate, the extraction temperature, the ionic strength of the sample solution, and the desorption time. Under the optimized conditions, the SPME-GC analytical method achieved a low detection limit (0.003 μg L) and wide linear ranges (0.01-100 μg L and 0.01-200 μg L) along with good correlation coefficients (0.9892-0.9962). The established method was also used to analyze rainwater and an aqueous solution of coal ash. The results indicated that this fiber could be applied in real-world environmental monitoring. The proposed fiber also exhibited excellent durability. Graphical Abstract The schematic diagram of experimental process.

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“…Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex [8]. In molluscs and crustacea copper is a constituent of the blood pigment hemocyanin, replaced by the iron-complexed hemoglobin in fish and other vertebrates [9]. In humans, copper is found mainly in the liver, muscle, and bone [10,11].…”

Section: Introductionmentioning

confidence: 99%

Determination of Trace Amounts of Copper in Samples of Sarcheshmeh Copper Mine Using Dispersive Liquid-Liquid Microextraction Based on the Solidification of Floating Organic Droplets Prior to FAAS

Arabpour¹

2017

SJAC

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Abstract:In this article dispersive liquid-liquid microextraction [1,2] based on the solidification of floating organic drop (DLLME-SFO) [3] was successfully used as a sample preparation method prior to flame atomic absorption determination of trace amount of copper in standard and wastewater samples [4]. Several factors that may be affected on the extraction process, such as extraction and disperser solvent, the volume of extraction and disperser solvent, effect of salt, pH of the aqueous solution and extraction, time and Ions effect were optimized [5]. Under the best experimental conditions, the calibration curve was linear in the range of 0.8 ng mL -1 -0.5 µg mL -1 of copper and detection limit was 0.2 ng mL -1 in the original solution (3Sb/m). The relative standard deviation seven replicate determination of 0.1 µg mL -1 copper was ± 1.9%. The high efficiency of DLLME-SFO to carry out the determination of copper in complex matrices was demonstrated. Finally, the proposed method has been applied for determination of trace amount of copper in standard and wastewater samples of Sarcheshmeh Copper mine and other factory with satisfactory results.

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Headspace solid-phase microextraction for the determination of volatile organic sulphur and selenium compounds in beers, wines and spirits using gas chromatography and atomic emission detection

Cited by 80 publications

References 32 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

In-situ hydrothermal synthesis of titanium dioxide nanorods on titanium wire for solid-phase microextraction of polycyclic aromatic hydrocarbons

Determination of Trace Amounts of Copper in Samples of Sarcheshmeh Copper Mine Using Dispersive Liquid-Liquid Microextraction Based on the Solidification of Floating Organic Droplets Prior to FAAS

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