River Sediment Analysis by Slurry Sampling FAAS: Determination of Copper, Zinc and Lead

Alves, Flávia L.; Cadore, Solange; Jardim, Wilson F.; Arruda, Marco Aurélio Zezzi

doi:10.1590/s0103-50532001000600018

Cited by 27 publications

(12 citation statements)

References 25 publications

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“…Slurry sampling methods using flame AAS (FAAS) are described less frequently in the literature (Alves, Cadore, Jardim, & Arruda, 2001;DeAlmeida, Leandro, DaCosta, Santelli, & DelaGuardia, 1997;Pereira, Berndt, & Arruda, 2002;Quaresma, Cassella, & De LaGuardia, 2004;Santos et al, in press), at least in part because of the limited sensitivity of this technique, and the risk of clogging the nebulizer capillary with sample particles.…”

Section: Introductionmentioning

confidence: 99%

Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometry

et al. 2007

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The wheat is one of the cereals more consumed in the human food in all worlds. In the form of flour it is used for preparation of breads, cookies, pizzas, cakes, and etc. This way, the knowledge of the mineral content this cereal and its flour is very important. Considering it, methods for determination of metals in these matrices are opportune and several papers have been performed. In this paper, a slurry sampling flame atomic absorption spectrometric method for the determination of manganese in wheat flour is proposed. The optimization step was performed using univariate methodology involving the variables: nature and concentration of the acid solution for slurry preparation, sonication time and sample mass. The established experimental conditions after optimization recommend a sample mass of 0.5 g, 2.0 mol L À1 nitric acid solution and a sonication time of 15 min. This method allows the determination of manganese in wheat flour using the standard calibration technique, with a detection limit of 0.13 lg g À1 , and a precision, expressed as relative standard deviation (RSD) of 3.5% (n = 10) for a manganese content of about 7.6 lg g À1 and using a wheat flour mass of 0.5 g. The accuracy was confirmed by analyzing of three certified reference materials of rice flours. The proposed method was applied for the determination of manganese in seven samples of wheat flour acquired in supermarkets from Salvador City, Brazil. In these, the manganese content varied of 5.2 and 7.6 lg g À1. The results showed no significant differences with those obtained after complete digestion of these samples and manganese determination also using FAAS.

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Section: Introductionmentioning

confidence: 99%

Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometry

et al. 2007

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“…Likewise, calibration models for ETV-ICP techniques generally involve aqueous standards as described by de LoosVollebregt and coworkers in a recent comprehensive review article (11). The application of this calibration method for FAAS and ICP techniques can be easily employed but depends on several factors as described in the literature (45).…”

Section: External Calibration With Aqueous Standardsmentioning

confidence: 99%

Slurry Sampling—An Analytical Strategy for the Determination of Metals and Metalloids by Spectroanalytical Techniques

Ferreira

Miró

Silva

et al. 2010

Applied Spectroscopy Reviews

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This article critically overviews the state-of-the-art of slurry sampling as an approach for the minimization of sample preparation prior to the determination of metals and metalloids in complex matrices by spectroanalytical techniques. Relevant factors involved in the optimization of slurry-based analytical procedures and the dependence of the quality of the results on the calibration method selected are discussed in detail. The advantages and limitations compared to solid sampling for the analysis of solid matrices are highlighted and discussed. Analytical applications of slurry sampling reported in the literature emphasizing publications between 2004 and 2009 are comprehensively compiled covering detection by flame atomic absorption spectrometry (FAAS), electrothermal atomic absorption spectrometry (ET-AAS), cold vapor atomic absorption spectrometry (CV-AAS), hydride generation atomic absorption spectrometry (HG-AAS), hydride generation atomic fluorescence spectrometry (HG-AFS), inductively coupled plasma optical emission spectrometry (ICP-OES), and inductively coupled plasma mass spectrometry (ICP-MS).

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“…18 The quantification of trace elements in food samples can be performed using the flame atomic absorption spectrometry (F AAS) due to its low cost, simplicity and high analytical throughput, with samples digested by mineral acids (such as HNO 3 , H 2 SO 4 , HClO 4 , HCl) under heating. [18][19][20][21] In spite of the number of studies concerning FA and trace element determinations in pequi fruit found in the literature (mentioned above), only a few studies have been devoted to the quantitative analysis of pequi oil. Within this context, the aim of the present work was to demonstrate the potential of CZE for FFA (palmitic, oleic and linoleic acids) determination in pequi oil samples using ethanolic extraction as a simple sample preparation, and to quantify the trace element levels (Cu, Fe, Mn and Zn) in these samples using F AAS, following a new acid digestion procedure.…”

Section: Introductionmentioning

confidence: 99%

DETERMINATION OF Cu, Fe, Mn, Zn AND FREE FATTY ACIDS IN PEQUI OIL

Mimura¹,

Faza²,

Marques³

et al. 2016

Química Nova

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Recebido em 31/08/2015; aceito em 04/02/2016; publicado na web em 15/04/2016 Pequi (Caryocar brasiliense Camb.), a typical fruit of the Brazilian Cerrado, is an important source of micronutrients and fatty acids. In this work, a new approach for the acid digestion (using H 2 SO 4 , HNO 3 and H 2 O 2 ) of pequi oil samples and the determination of Cu, Fe, Zn and Mn by flame atomic absorption spectrometry (F AAS) was employed. Capillary zone electrophoresis (CZE) was used for free fatty acid (FFA) determination after simple and fast extraction with heated ethanol. Good results regarding precision (RSD < 10%, in most cases), sensitivity and adequate LOD and LOQ values were obtained. The accuracy was evaluated using spike tests and the recoveries were from 97 to 107%. The analytes were investigated in four different pequi oil samples. Fe was the trace element with the highest concentration (from 1.99 to 10.3 mg/100 g), followed by Zn, Mn and Cu (1.15 to 3.19, 0.42 to 0.91 and 0.31 to 0.56 mg/100 g, respectively). The main FFA found were oleic acid and palmitic acid (1.61 to 10.7 and 0.82 to 2.69 g/100 g, respectively), while linoleic acid (0.50 g/100 g) was detected in only one sample. The pequi oil chemical composition showed good characteristics to be used as a food additive, in cosmetic formulations and for traditional medicine.

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River Sediment Analysis by Slurry Sampling FAAS: Determination of Copper, Zinc and Lead

Cited by 27 publications

References 25 publications

Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometry

Method development for the determination of manganese in wheat flour by slurry sampling flame atomic absorption spectrometry

Slurry Sampling—An Analytical Strategy for the Determination of Metals and Metalloids by Spectroanalytical Techniques

DETERMINATION OF Cu, Fe, Mn, Zn AND FREE FATTY ACIDS IN PEQUI OIL

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