Atomic absorption spectrometric analysis of solids with on-line microwave-assisted digestion

Carbonell, V.; Morales‐Rubio, Ángel; Salvador, Amparo; Guárdia, Miguel de la; Burguera, J.L.; Burguera, M.

doi:10.1039/ja9920701085

Cited by 32 publications

(9 citation statements)

References 12 publications

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“…This is a closed system where sample and reagents can be pumped continuously through the flow system or maintained to be irradiated in stopped-flow conditions. As examples of very interesting works regarding a continuous flow system and environmental samples we must mention the papers published by Karanassios et al (1991), Haswell and Barclay (1992), Welz et al (1992), Tsalev et al (1992a), Carbonell et al (1992), Hanna and McIntosh (1995), Arruda et al (1997) and Almeida et al (1997). These papers deal with metal determinations by using atomic spectroscopy techniques for samples such as waters, wastewaters, botanic, biological tissues, sludge, sediments, and rocks, respectively.…”

Section: Microwave-assisted Sample Preparationmentioning

confidence: 97%

Modern Strategies for Environmental Sample Preparation and Analysis

Santelli¹,

Cassella²,

Arruda³

et al. 2004

Environmental Geochemistry in Tropical and Subtropical Environments

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Section: Microwave-assisted Sample Preparationmentioning

confidence: 97%

Modern Strategies for Environmental Sample Preparation and Analysis

Santelli¹,

Cassella²,

Arruda³

et al. 2004

Environmental Geochemistry in Tropical and Subtropical Environments

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“…Many of these problems can be avoided or at least alleviated if the process is carried out by the flow injection methodology (FIA) [18]. Several authors have achieved satisfactory results using the FIA methodology to combine the microwave sample treatment with atomic spectrometric detection (i.e., FAAS, ICP/AES) [19][20][21][22][23][24][25][26][27]. Burguera et al [19] used an FIA flow-merging manifold for the FAAS determination of Cu, Zn and Fe in blood.…”

Section: Introductionmentioning

confidence: 97%

“…The mean values obtained for both elements were similar in all three cases, whereas the dispersion of the values was greater for the on-line system. Burguera and Burguera [26] used an MW-ETA combination for the determination of Pb in biological samples, with a digestion time of 25 s and P"700 W. De la Guardia et al [21,23,25] applied microwave radiation to the decomposition of sewage sludge by means of two configurations, (1) closed flow injection systems [21,23] and (2) mergingflow/on-line MW digestion [25], using FAAS to carry out the elemental analysis. Using configuration (1) they got quantitative recoveries for Pb, Cu and Mn in a digestion time of 4-5 min, whereas with configuration (2) the quantitative recovery for the same elements plus Zn was reached in a digestion time of about 5 min and with P"650 W, depending on the experimental conditions (i.e., length and inner diameter of the capillary, and flow).…”

Section: Introductionmentioning

confidence: 99%

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Automatic flow-injection system for the determination of heavy metals in sewage sludge by microwave digestion and detection by inductively coupled plasma-atomic emission spectrometry (MW-ICP/AES)

Bordera

Hernandis

Canals

1996

Analytical and Bioanalytical Chemistry

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Results are shown obtained in the optimization of an automatic flow injection system that combines microwave digestion with atomic spectrometric detection (FAAS, ICP/AES) for the determination of heavy metals in sewage sludge. Digestion is performed by preparing a suspension of the sample in 1.5 mol/l HNO(3) and making it flow through a PTFE capillary tube placed inside a conventional microwave oven. The effects of the length and inner diameter of the capillary tube, as well as that of the pumping rate, have been studied in order to find the experimental conditions that allow a quantitative elemental recovery in the shortest period of time possible. The optimization study was carried out on a certified sample (BCR No. 146), and the elements determined were Zn, Cu, Pb, Cd, Ni and Cr. The experimental data (percent recovery vs. digestion time) have been fitted to a mathematical model in order to quantify the influence of each of the variables studied. The optimized procedure (MW-ICP/AES) has been applied to one ordinary and one certified sewage sludge sample. In comparison with the conventional methods of sewage sludge analysis, the one proposed is less time consuming, while being equally precise and accurate.

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“…Cou pling con tin u ous flow sys tems with mi cro wave digestors has been car ried out in com bi na tion with flame atomic ab sorp tion [10][11][12] or in duc tively cou pled plasma atomic emis sion spec trom e try 13,14 . How ever, few ap pli ca -tions with electrothermal atomic ab sorp tion spec trom e try have been re ported 15,16 .…”

Section: Introductionmentioning

confidence: 99%

On-line microwave-assisted sample decomposition for lead determination in fish slurry samples by electrothermal atomic absorption spectrometry

Arruda¹,

Fostier²,

Krug³

1997

J. Braz. Chem. Soc.

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Um procedimento FIA envolvendo decomposição em linha auxiliada por microondas foi proposto para a determinação de chumbo em peixes por espectrometria de absorção atômica com atomização eletrotérmica. Um vol ume de 300 µL da amostra em forma de suspensão foi injetado simultaneamente com 400 µL de ácido nítrico (6 mol L-1), e a mistura foi dirigida para um reator tu bu lar posicionado dentro do forno de microondas. A amostra processada foi coletada em uma cubeta do amostrador de um espectrômetro de absorção atômica com forno de grafite. A curva analítica mostrou-se lin ear en tre 2,5 e 25,0 µg L-1 Pb e o limite de detecção foi determinado como 0,72 µg L-1. A precisão, expressa em desvio padrão relativo, foi de 10,5% (n = 20) para repetibilidade e de 14,3% (n = 10) para reprodutibilidade. A exatidão do método foi confirmada empregando-se um ma te rial de referência e comparando-se os resultados obtidos com um procedimento envolvendo decomposição nítrico-perclórica. An on-line mi cro wave-assisted de com po si tion pro ce dure for the de ter mi na tion of lead in fish is pro posed. 300 µL slurry and 400 µL of a 6 mol L-1 HNO3 so lu tion were si mul ta neously in jected, and the mix ture was po si tioned in side a mi cro wave oven. The de com posed sam ple inside the flush ing so lu tion was col lected in the autosampler cup of a graph ite fur nace. The proposed pro ce dure cov ered the 2.5 to 25 µg L-1 Pb range and pre sented a de tec tion limit of 0.72 µg L-1 Pb. Pre ci sion ex pressed as RSD, was 10.5% (n = 20) for re peat abil ity and 14.3% (n = 10) for reproducibility. Ac cu racy was as sessed us ing stan dard ref er ence ma te rial, and also by comparing the re sults to a ni tric-perchloric de com po si tion pro ce dure.

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Atomic absorption spectrometric analysis of solids with on-line microwave-assisted digestion

Cited by 32 publications

References 12 publications

Modern Strategies for Environmental Sample Preparation and Analysis

Modern Strategies for Environmental Sample Preparation and Analysis

Automatic flow-injection system for the determination of heavy metals in sewage sludge by microwave digestion and detection by inductively coupled plasma-atomic emission spectrometry (MW-ICP/AES)

On-line microwave-assisted sample decomposition for lead determination in fish slurry samples by electrothermal atomic absorption spectrometry

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