Microwave-Induced Combustion Coupled to Flame Furnace Atomic Absorption Spectrometry for Determination of Cadmium and Lead in Botanical Samples

Barin, Juliano Smanioto; Bartz, Fabiane Regina; Dressier, Valderi L.; Paniz, José Neri Gottfried; Flores, Érico M.M.

doi:10.1021/ac8015714

Cited by 21 publications

(29 citation statements)

References 36 publications

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“…After combustion has been finished the quartz holder was removed for a subsequent cycle of analysis. Calibration was evaluated by using reference solution added directly on the filter paper as described in previous work 28 or using reference solution added to high purity graphite powder pellets.…”

Section: Proposed Mic-ff-aas Proceduresmentioning

confidence: 99%

“…On the other hand, preliminary tests using MIC-FF-AAS procedure for lyophilized samples were performed according to conditions described in previous work. 28 Pellets of lyophilized blood were wrapped with filter paper and placed on the sample holder. Ammonium nitrate solution (40 µL) was added to the paper and the sample holder was introduced into the glass chamber.…”

Section: Optimization Of Operating Conditions For Mic-ff-aasmentioning

confidence: 99%

“…27 Based in previous works, [25][26][27] some authors proposed the combination of microwave induced combustion (MIC) system to a flame furnace (FF) for analysis of botanical samples by atomic absorption spectrometry (AAS). 28 For the combustion step, solid samples were introduced as pellets into a glass chamber using a quartz holder device. This chamber was coupled to a metallic FF by using polytetrafluoroethylene and quartz tubes.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Cd in blood by microwave-induced combustion coupled to flame furnace atomic absorption spectrometry

Hoehne¹,

Bartz²,

Bizzi³

et al. 2010

J. Braz. Chem. Soc.

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Um sistema de combustão iniciada por microondas foi acoplado a um espectrômetro de absorção atômica com atomização em tubo metálico aquecido com chama (FF) do tipo ar-acetileno para a determinação de cádmio em sangue. Amostras de sangue liofilizado foram preparadas como comprimidos, posicionadas em um suporte de quartzo e introduzidas em uma câmara de vidro empregada para a etapa de combustão. A câmara foi acoplada ao tubo metálico usando tubos de politetrafluoroetileno e de quartzo. A ignição foi iniciada por irradiação microondas usando solução de nitrato de amônio adicionada em papel previamente descontaminado. Oxigênio foi usado na etapa de combustão e para o transporte dos produtos gerados até o tubo aquecido. Grafite em pó de alta pureza foi misturada com as amostras antes do preparo dos comprimidos. O volume da solução de NH 4 NO 3 , a vazão de oxigênio, a estequiometria da chama, o tipo de suporte e a quantidade de massa de amostra foram avaliados. A calibração foi possível usando solução de referência adicionada a comprimidos de grafite de alta pureza, não sendo necessário o uso de material de referência certificado (CRM). Foi possível a combustão de até 56 mg de amostra, permitindo a obtenção de limite de quantificação de 0,018 µg g -1 e massa característica de 50 pg de Cd. Os valores dos brancos foram baixos (absorbância integrada menor que 0,01 s). Os resultados foram considerados satisfatórios com respeito à exatidão (concordância com valores de CRMs entre 95 e 99%) e à precisão (coeficiente de variação < 12%). Até 15 determinações podem ser feitas por hora incluindo a etapa de pesagem.Microwave-induced combustion system was coupled to a metallic flame furnace (FF) atomic absorption spectrometer and applied for cadmium determination in blood. Lyophilized blood samples were prepared as pellets, positioned on a quartz holder and introduced into a glass chamber used for the combustion step. The glass chamber was coupled to the metallic flame furnace by using polytetrafluoroethylene and quartz tubes. Ignition was performed by microwave radiation using ammonium nitrate solution added to a small piece of previously cleaned paper. Oxygen was used to assist the sample combustion and also to transport combustion products up to the FF heated by an air/acetylene flame. High purity graphite powder was mixed with samples before pellets preparation. The volume of NH 4 NO 3 solution, oxygen flow-rate, flame stoichiometry, sample holder type and the sample mass range were evaluated. Calibration step was feasible using adsorbed reference solution in pelletized high purity graphite avoiding the use of certified reference material (CRM). Sample masses up to 56 mg could be used allowing quantification limit of 0.018 µg g -1 and characteristic mass of 50 pg Cd. Low values for blanks were obtained (integrated absorbance lower than 0.01 s) and results were considered satisfactory regarding to both accuracy (agreement with results using CRMs between 95 to 99%), and precision (relative standard deviation < 12%). Up to 15 de...

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Section: Proposed Mic-ff-aas Proceduresmentioning

confidence: 99%

Section: Optimization Of Operating Conditions For Mic-ff-aasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of Cd in blood by microwave-induced combustion coupled to flame furnace atomic absorption spectrometry

Hoehne¹,

Bartz²,

Bizzi³

et al. 2010

J. Braz. Chem. Soc.

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show abstract

“…However, partial contact to even very small amounts of lead can be hazardous, especially to infants and young children. Therefore it is very significant to examine the trace levels of it in environments [2].Presently, the mostcommon analytical methods for the determination of trace amount of lead are the flame atomic absorption spectrometry (FAAS) [3]. The electrothermal atomic absorption spectrometry (ETAAS) [4]and the inductively coupled plasma emission spectrometry (ICP) [5].…”

Section: Introduction:-mentioning

confidence: 99%

“…Pb(NO 3 Procedure:-For the cloud point extraction, an aliquots 1 ml of a solution containing lead, are mixed with 0.6 ml of 1N HNO 3 , 2 ml Triton X-114 1% (W/V) and 2.5ml of 200 ppmAPDC. The mixture were placed in a volumetric flask,the mixture (1:1) volume ratio of 2 ml Hydroznium sulphat:Amonium nitrite was add and the volume completed by DW,the total amount was transfer to centrifuge tube and heated in a thermostat water bath at 45˚C for 20 min.…”

Section: Introduction:-mentioning

confidence: 99%

Sensitive determination of Lead in Brine water by Cloud Point Extraction-Flame Atomic Absorption Spectrometry Method using Mixed Matrix modifying agents.

Award¹,

AlabdulAziz²

2016

IJAR

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A cloud point extraction (CPE) method was developed for the separation and preconcentration of trace amounts of lead is combined with flame atomic absorption spectrometry (FAAS) to determine trace amounts of lead in brine water. The method is depended on the formation of the hydrophobic complex between Pb(II) and (APDC) followed by its extraction into a Triton X-114 using surfactant. The parameters such as pH of sample, concentrations ofAPDC and Triton X-114, equilibrium temperature, and equilibrium time, which affect both complexation and extraction, are optimized. Under the selected optimum conditions, and use of matrix modifying agents enable us to develop the direct method for determination Pb in brine water. The accuracy of the method was % (96)while the detection limit was found to be (0.1122 ppm) for preconcentration of 1.0 ml sample,for the determination of Pb(II) is obtained.

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Analytical methods for the determination of halogens in bioanalytical sciences: a review

et al. 2013

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Fluorine, chlorine, bromine, and iodine have been studied in biological samples and other related matrices owing to the need to understand the biochemical effects in living organisms. In this review, the works published in last 20 years are covered, and the main topics related to sample preparation methods and analytical techniques commonly used for fluorine, chlorine, bromine, and iodine determination in biological samples, food, drugs, and plants used as food or with medical applications are discussed. The commonest sample preparation methods, as extraction and decomposition using combustion and pyrohydrolysis, are reviewed, as well as spectrometric and electroanalytical techniques, spectrophotometry, total reflection X-ray fluorescence, neutron activation analysis, and separation systems using chromatography and electrophoresis. On this aspect, the main analytical challenges and drawbacks are highlighted. A discussion related to the availability of certified reference materials for evaluation of accuracy is also included, as well as a discussion of the official methods used as references for the determination of halogens in the samples covered in this review.

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Microwave-Induced Combustion Coupled to Flame Furnace Atomic Absorption Spectrometry for Determination of Cadmium and Lead in Botanical Samples

Cited by 21 publications

References 36 publications

Determination of Cd in blood by microwave-induced combustion coupled to flame furnace atomic absorption spectrometry

Determination of Cd in blood by microwave-induced combustion coupled to flame furnace atomic absorption spectrometry

Sensitive determination of Lead in Brine water by Cloud Point Extraction-Flame Atomic Absorption Spectrometry Method using Mixed Matrix modifying agents.

Analytical methods for the determination of halogens in bioanalytical sciences: a review

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