Determination of manganese in herbal medicine samples by slurry-sampling electrothermal atomic absorption spectrometry with a metal tube atomizer

Amin, Nurul; Kaneco, Satoshi; Suzuki, Tohru; Taniguchi, Yako; Ohta, Kouji

doi:10.1007/s00216-002-1303-1

Cited by 14 publications

(11 citation statements)

References 31 publications

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“…Nos últimos anos, vem sendo crescente o número de estudos envolvendo não apenas a determinação de nutrientes minerais em plantas medicinais (ABOU-ARAB et al, 1999;AJASA et al, 2004;AMIN et al, 2002;ALMEIDA et al, 2002), mas também estudos complementares que forneçam informações mais completas para identificar as formas químicas (espécies) e a estrutura dos compostos aos quais diferentes nutrientes minerais estão associados, representando hoje um aumento significativo de trabalhos na literatura (SANZ MEDEL, 2005;WEBER;KONIECZYNSKI, 2003;BANTAN;MILACIC;MITROVIC, 1999;SILVA;WILLIAMS, 2001;LIPPARD;BERG, 1994).…”

Section: Resultsunclassified

Avaliação do uso da casca do fruto e das folhas de Caesalpinia ferrea Martius como suplemento nutricional de Fe, Mn e Zn

Silva¹,

Nunes²,

Mescouto³

et al. 2010

Ciênc. Tecnol. Aliment.

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O uso de plantas medicinais é uma prática comum no país, a qual tem sido transmitida de geração em geração e é realizada por meio do extrativismo. A utilização e comercialização de plantas medicinais têm sido estimuladas pela crescente demanda da indústria por novas fontes naturais de medicamentos e, por outro lado, devido aos efeitos colaterais causados pelos fármacos sintéticos que estimulam o aproveitamento de medicamentos de origem vegetal ou, em muitos casos, porque representam a única fonte de medicamentos, especialmente nos lugares mais isolados e distantes, e como resposta aos problemas imediatos de saúde (VEIGA JÚNIOR;PINTO;MACIEL, 2005).A Organização Mundial da Saúde estima que 80% da população mundial depende da medicina tradicional para suas necessidades básicas de saúde e que quase 85% da medicina tradicional envolve o uso de plantas medicinais, seus extratos vegetais e seus princípios ativos (AKERELE, 1993).Alguns nutrientes minerais presentes em plantas possuem um papel preventivo no combate de doenças, mas é importante ressaltar que níveis elevados desses minerais podem ser perigosos e tóxicos ao organismo. Alguns minerais como Co, Cr, Cu, Fe, Mn, Mg, Mo, Se e Zn são considerados essenciais à saúde por atuarem em importantes vias metabólicas, participando de Tris-HCl buffer (pH 8.0) containing 1% (m/v) sodium dodecylsulfate (SDS), 0.05 mol.L -1 HCl, and hot water at 60 °C. The peel and leaves of Caesalpinia ferrea Martius presented higher levels of iron and manganese when compared to other medicinal plants. The elements studied showed predominant association with compounds of high and low molecular weight and soluble and insoluble species in water. Among the analyzed elements, the iron presented the best bioavailability in the peel and leaves of the fruit. Manganese and zinc presented higher bioavailability in the leaves. The peel and leaves of Caesalpinia ferrea Martius can be an alternative source of iron, manganese, and zinc in the alimentary diet. Keywords: iron; manganese; zinc; bioavailability; Caesalpinia ferrea Martius. ResumoAs plantas medicinais podem ser usadas como fontes alternativas de nutrientes minerais na dieta alimentar. Elementos como ferro, manganês e zinco apresentam biodisponibilidade variável em função de suas formas químicas (espécies) presentes em um alimento. Este trabalho tem como objetivo avaliar o teor e a biodisponibilidade de ferro, manganês e zinco em extratos da casca do fruto e das folhas

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Section: Resultsunclassified

Avaliação do uso da casca do fruto e das folhas de Caesalpinia ferrea Martius como suplemento nutricional de Fe, Mn e Zn

Silva¹,

Nunes²,

Mescouto³

et al. 2010

Ciênc. Tecnol. Aliment.

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“…The two pinhole apertures (1.0 mm in diameter) were placed in front and at the rear end of the atomizer to collimate the light beam and eliminate radiation form the atomizer surface. Full details were described elsewhere [25][26][27][28][29][30] .…”

Section: Apparatusmentioning

confidence: 99%

“…The highest signal was obtained by use of 7 % glycerol as slurring medium. In the slurry sampling ETAAS for the analysis of herbal medicine and vegetable samples, 25,26,[28][29][30] the optimum glycerol solution as the slurry-stabilizing agent was 10 % in water. The differences may be due to the densities of solid materials.…”

Section: Optimization Of Slurry Samplingmentioning

confidence: 99%

“…[21][22][23][24] Despite these advantages, little information on the combination of the metal tube atomizer in ETAAS with slurry sampling technique has been presented. [25][26][27][28][29][30] Although the determination of lead in calcium drug samples by slurry sampling ETAAS with the molybdenum tube atomizer was studied, 25 the sedimentation of suspension material could be gradually observed with time, due to the absence of suspension-stabilizing agents.…”

Section: Introductionmentioning

confidence: 99%

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Slurry Sampling Techniques for the Determination of Lead in Bangladeshi Fish Samples by Electrothermal Atomic Absorption Spectrometry with a Metal Tube Atomizer

Rahman¹,

Kaneco²,

Suzuki³

et al. 2005

Annali di Chimica

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Ultrasonic slurry sampling electrothermal atomic absorption spectrometry with a metal tube atomizer has been applied to the determination of lead in Bangladeshi fish samples. The slurry sampling conditions, such as slurry stabilizing agent, slurry concentration, pyrolysis temperature for the slurried fish samples, particle size and ultrasonic agitation time, were optimized for electrothermal atomic absorption spectrometry with the Mo tube atomizer. Thiourea was used as the chemical modifier for the interference of matrix elements. The detection limit was 53 fg (3S/N). The determined amount of lead in Bangladeshi fish samples was consistent with those measured in the dissolved acid-digested samples. The advantages of the proposed methods are easy calibration, simplicity, low cost and rapid analysis.

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“…The analysis of trace elements in medicinal plants is typically focused on the determination of total content (Amin et al, 2002) or on the concentration of inorganic/ organic, dissolved/particulate or exchangeable/nonexchangeable trace elements (Ye and Huang, 1994;Li et al, 2000). From such information, however, the pharmacological or toxicological mechanisms of trace elements in a phytomedicine cannot be readily understood, and rational dosage criteria cannot be proposed.…”

Section: Introductionmentioning

confidence: 99%

Speciation analysis and the assessment of bioavailability of manganese in phytomedicines by extraction with octanol and determination by flame atomic absorption spectrometry

Zheng

Liu

et al. 2005

Phytochemical Analysis

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Trace elements in phytomedicines are present in the form of metallic complexes. Since n-octanol, a long-chain alkanol, presents a configuration similar to that of carbohydrates and lipids, the lipophilicity and absorptivity of organic medicines may be assessed from their distribution coefficients between octanol and water. This strategy has been used in order to define the species of manganese in a number of phytomedicines and to study the distribution of manganese in decoctions of phytomedicines in the stomach and the intestine. The concentrations of manganese in the original herbal materials and in octanol-and water-soluble fractions were determined by flame atomic absorption spectrometry following mixed acid digestion. The acidities of gastric and intestinal juices, the phytomedical composition and the compatibility of phytomedicines, i.e. the combination of single phytomedicines, greatly affected the manganese complexing ligands and determined the species and bioavailability of manganese. It is concluded that a knowledge of the level of octanol-soluble manganese in a phytomedicine could form the basis of dosage design in order to avoid manganese overload.

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Determination of manganese in herbal medicine samples by slurry-sampling electrothermal atomic absorption spectrometry with a metal tube atomizer

Cited by 14 publications

References 31 publications

Avaliação do uso da casca do fruto e das folhas de Caesalpinia ferrea Martius como suplemento nutricional de Fe, Mn e Zn

Avaliação do uso da casca do fruto e das folhas de Caesalpinia ferrea Martius como suplemento nutricional de Fe, Mn e Zn

Slurry Sampling Techniques for the Determination of Lead in Bangladeshi Fish Samples by Electrothermal Atomic Absorption Spectrometry with a Metal Tube Atomizer

Speciation analysis and the assessment of bioavailability of manganese in phytomedicines by extraction with octanol and determination by flame atomic absorption spectrometry

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