Slurry-electrothermal atomic absorption spectrometric determination of aluminium and chromium in vegetables using hydrogen peroxide as a matrix modifier

Viñas, Pilar; Campillo, Natalia; López-Garcı́a, Ignacio; Hernández‐Córdoba, Manuel

doi:10.1016/0039-9140(95)01429-f

Cited by 35 publications

(10 citation statements)

References 23 publications

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“…The levels of total Cr in Lycopersicum esculentum were was determined to range between 0.008 -0.026 μg g -1 (fresh weight of the edible fraction, Lendinez et al, 2001). These levels are similar to those obtained by Vinas et al (1995) and Chiffoleau and Bonneau (1994). The Cr levels tended to be higher in roots and tubers than in bulbs, whereas leaves and tender stalks had the lowest levels (Schuhmacher et al, 1993).…”

Section: Soils Adjacent To Major Roadssupporting

confidence: 54%

Medical geochemical investigations in taking precautionary measures against diseases. Protection and human health

2013

Global NEST Journal

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A considerable number of diseases are directly related to environmental impact. Toxic metals such as Hg, Pb, Cd, and As may damage significantly the human health when they exceed certain levels in the body. For example specific precautions should be taken for the diet of pregnant women and the children. Lead concentrations exceeding the safe values can cause severe damage to the development of central nervous system, as well as a general developmental delay of fetuses and young children, interfering with the functioning of almost every brain neurotransmitter. In particular for the pregnant women, it has been found that the exposure of the fetus on high lead values may cause, apart from neurological and behavioral problems, low birth weight, pre-term delivery, spontaneous abortion and stillbirth. Organic mercury (methyl mercury) is the most dangerous form of mercury, because it is the most easily absorbed orally and crosses into the brain and fetus so readily. Populations exposed to chemical compounds containing As, Ni, Cr, Cd, etc. are considered of high-risk in developing cancer.Environmental geochemical studies can help in assessing the quality of the environment as well as the determination of the sources of pollutants, their behaviour and other characteristics. This knowledge is necessary in any application of remediation methodologies and waste management for the prevention of pollutants in getting into the food chain. It is also used in determining safe criteria regarding the quality of soils, drinking water, construction of schools, playgrounds etc. In this work the importance of environmental geochemical research and its applications towards the protection of human health is demonstrated. KEYWORDS:Medical geochemistry, metals in human health, metals in cancer disease, metals in nervous diseases, Pb in fetus development, remediation methods, and job diseases.

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Section: Soils Adjacent To Major Roadssupporting

confidence: 54%

Medical geochemical investigations in taking precautionary measures against diseases. Protection and human health

2013

Global NEST Journal

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“…Recently, our group has disclosed a preliminary report [14] on the electrochemical detection (linear sweep voltammetry) of ACH using disposable type silver screenprinted electrode and proved that the silver electrodes shows best electrochemical activity compared to that of the carbon electrodes, since silver can form silver halides with chloride ion, which is released from the ACH in presence of water as per the chemical reaction; Al 2 (OH) 5 Cl·2H 2 O!Al 13 O 4 (OH) 24 (H 2 O) 12 7 + + 7Cl À and the response obtained is also highly stable for practical analysis. Further, in this work a new flow injection analysis (FIA) based electrochemical measurement has been introduced using built-in three-in-one screen-printed silver electrode (SPAgE) suitable for rapid, low cost and low working volume detection of ACH for various anti-perspirant deodorant real samples for the first time.…”

Section: Introductionmentioning

confidence: 98%

“…Note that a recent report indicated that continuous usage of the ACH containing cosmetic products allows transdermal absorption of cutaneous generated hormones and pheromones and as a link to breast and prostate cancers [6]. Detection of aluminum concentration from the real samples are extensively carried out using various techniques such as inductively coupled plasma atomic emission spectrometric (ICP-AES) [7,8], flame atomic absorption spectrometric (FAAS) [9,10] and atomic absorption spectroscopic techniques [11][12][13]. Unfortunately, all these methods have time consuming operation procedures, including extensive preconcentration of the analyte.…”

Section: Introductionmentioning

confidence: 99%

Flow Injection Analysis of Aluminum Chlorohydrate in Antiperspirant Deodorants Using a Built‐in Three‐in‐one Screen‐Printed Silver Electrode

et al. 2010

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A screen-printed silver strip with a built-in three-in-one electrode (SPAgE) configuration of Ag-working, Ag-counter and Ag/Ag(x)O (silver oxides) pseudoreference electrodes has been developed for sensitive and selective electrochemical flow injection analysis (FIA) of aluminum chlorohydrate (ACH) present in antiperspirants, through the free Cl(-) ion liberated from ACH in aqueous medium, as a redox signal at Ag-working electrode in pH 6 phosphate buffer solution (PBS). The solution phase and instrumental parameters were systematically optimized. The calibration graph was linear in the window 1-200 ppm concentration of ACH and the lowest detection limit (S/N = 3) was 295 ppb with a slope of 0.0989 mu A/ppm and regression coefficient of 0.998. Calculated relative standard deviation (RSD) values for the detection of 5 and 50 ppm ACH by this method are 2.21% and 2.16%, respectively. Four different antiperspirant deodorants real samples with and without ACH content were successfully analyzed and the detected values obtained were found to be in good agreement with the product labeled values

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“…Nitric acid has been used by several authors [27][28][29] because the analytes are mobilized from the solid particles to the liquid media, which improves the precision of the method 7 , while nitrates do not interfere in the atomization paths for the metals involved. The concentrations selected, 2.0 mol L -1 for Cu, Fe and Zn and 4.0 mol L -1 for Mn, were used according to previous studies shown in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

Direct analysis of Antarctic krill by slurry sampling: determination of copper, iron, manganese and zinc by flame atomic absorption spectrometry

Alves¹,

Smichowski²,

Farías³

et al. 2000

J. Braz. Chem. Soc.

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A técnica de amostragem de suspensão aliada à espectrometria de absorção atômica com chama foi empregada para a determinação direta de Cu, Fe, Mn e Zn em matrizes de Krill antártico. O efeito dos parâmetros instrumentais e o preparo das suspensões foram estudados em função do sinal analítico. Para a determinação de Cu, Fe e Zn, as amostras foram suspensas em uma solução de HNO 3 2,0 mol L -1 e para a determinação de Mn, o krill foi suspenso em uma solução de HNO 3 4,0 mol L -1 . A precisão entre as replicas foi melhor que 5 %. A metodologia foi aplicada para a determinação direta de Cu, Fe, Mn e Zn em amostras de krill antártico, usando padrões aquosos no preparo das curvas analíticas. Os resultados obtidos estão concordantes com os encontrados na determinação por FAAS e ICP-AES, depois da digestão das amostras em um forno de microondas. Os limites de detecção foram 4,5; 1,0; 4,9 e 8,4 µg L -1 para Cu, Zn, Mn e Fe, respectivamente.Slurry sampling in combination with flame atomic absorption spectrometry was employed for the direct determination of four essential trace elements, namely Cu, Fe, Mn and Zn in Antarctic krill. The effect of instrumental operating conditions and slurry sampling preparation on the analytical signal was investigated. For the determination of Cu, Fe and Zn, samples were suspended in a solution containing 2 mol L -1 HNO 3 . In the case of Mn, 4 mol L -1 HNO 3 was necessary for the preparation of the slurry. The precision between sample replicates was better than 5%. The method was applied to the direct determination of Cu, Fe, Mn and Zn in Antarctic krill samples using aqueous reference solutions to prepare the calibration curves. The results obtained were in good agreement with those achieved by FAAS and ICP-AES after microwave-assisted wet digestion of the krill samples. The detection limits were 4.5, 1.0, 4.9 and 8.4 µg L -1 for Cu, Zn, Mn and Fe, respectively.

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Slurry-electrothermal atomic absorption spectrometric determination of aluminium and chromium in vegetables using hydrogen peroxide as a matrix modifier

Cited by 35 publications

References 23 publications

Medical geochemical investigations in taking precautionary measures against diseases. Protection and human health

Medical geochemical investigations in taking precautionary measures against diseases. Protection and human health

Flow Injection Analysis of Aluminum Chlorohydrate in Antiperspirant Deodorants Using a Built‐in Three‐in‐one Screen‐Printed Silver Electrode

Direct analysis of Antarctic krill by slurry sampling: determination of copper, iron, manganese and zinc by flame atomic absorption spectrometry

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