Focused-microwave-assisted acid digestion: Evaluation of losses of volatile elements in marine invertebrate samples

Costa, Letícia M.; Santos, Daniele Cristina Muniz Batista dos; Hatje, Vanessa; Nóbrega, Joaquim A.; Korn, Maria Graças A.

doi:10.1016/j.jfca.2008.10.017

Cited by 21 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The final approach involved microwave assisted acid digestion. This process has been reported to be performing well for biological samples as it allowed for complete digestion with only small amounts of reagents, minimum risk of contamination, and also showed high reproducibility [ 39 , 40 ]. For the E .…”

Section: Resultsmentioning

confidence: 99%

Development of an analytical method for determination of lead and cadmium in biological materials by GFAAS using Escherichia coli as model substance

Gende

Schmeling

2022

PLoS ONE

View full text Add to dashboard Cite

In this work, an analytical method was developed for the determination of lead and cadmium in biological samples using graphite furnace atomic absorption spectrometry. Escherichia coli (E. coli) was chosen as model substance for this purpose as it is readily available in most laboratories and can be quickly and easily prepared with a high turnaround rate. Four different sample preparation methods were initially evaluated with respect to percent recovery, limit of detection, and limit of quantification, and the most promising one was developed further. The final process involving microwave assisted digestion of the sample with nitric acid and hydrogen peroxide showed high recovery, repeatability, and specificity. The process was first applied to lead and then extended for the determination of cadmium in the same E. coli substrates. Finally, to validate the process, a certified references material was analyzed, and the results obtained were evaluated with respect to accuracy by comparing them to the reported ones.

show abstract

Section: Resultsmentioning

confidence: 99%

Development of an analytical method for determination of lead and cadmium in biological materials by GFAAS using Escherichia coli as model substance

Gende

Schmeling

2022

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Microwave-assisted digestion procedures using closed vessels and various acid mixtures have been employed to destroy the organic matrix of the biological samples, rapidly at elevated temperatures and/or pressure, to accelerate sample digestion and to minimize contamination and losses of volatile elements. [11][12][13] Multiple combinations of acid mixtures (HNO 3 , HNO 3 -HCl, HNO 3 -H 2 O 2 , HNO 3 -HF, HNO 3 -HCl-H 2 O 2 , HNO 3 -H 2 SO 4 ) have been reported in the literature for the digestion of environmental samples using microwave energy. [13][14][15][16][17][18] For polychaetes tissues is required to do a total digestion to obtain reliable results.…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13] Multiple combinations of acid mixtures (HNO 3 , HNO 3 -HCl, HNO 3 -H 2 O 2 , HNO 3 -HF, HNO 3 -HCl-H 2 O 2 , HNO 3 -H 2 SO 4 ) have been reported in the literature for the digestion of environmental samples using microwave energy. [13][14][15][16][17][18] For polychaetes tissues is required to do a total digestion to obtain reliable results. 19,20 The use of diluted solutions is recommended, once it strongly minimize the generation of acid residues, which is in accordance to green chemistry recommendations.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted acid Digestion Procedure for Trace Elements Determination in PolychaeteChaetopterus variopedatus

Eça¹,

Brito²,

Barbosa³

et al. 2014

Revista Virtual De Química

View full text Add to dashboard Cite

Procedimento de Digestão Assistido por Micro-ondas para Determinação de Elementos-traços no Poliqueta Chaetopterus variopedatusResumo: Este estudo avaliou e aplicou uma digestão, com ácido diluído, assistida por micro-ondas para determinar elementos-traço (As, Ba, Cd, Co, Cr, Cu, Hg, Mn, Ni e Sb) em amostras de poliquetas (Chaetopterus variopedatus). Após a otimização do método, empregando-se material certificado de referência (1566b CRM, tecido Oyster), os analitos foram determinados por espectrometria de massas com plasma indutivamente acoplado (ICP-MS) e espectrometria de emissão atômica com plasma indutivamente acoplado (ICP OES). A repetibilidade foi adequada (<10%), os resultados obtidos com o CRM concordaram com os valores certificados e o teor de carbono residual valores (RCC) foi menor do que 15%. Além disso, até dez amostras podem ser simultaneamente decompostas em 34 min., resultando num elevado rendimento. O método desenvolvido foi aplicado em amostras de poliquetas coletados na Baía de Todos os Santos, Bahia, Brasil. Palavras-chave:Elementos-traço; digestão assistida por micro-ondas; ácidos diluidos; tecido de poliquetas. AbstractThis study evaluated and applied a microwave-assisted diluted acid digestion to determine trace elements (As, Ba, Cd, Co, Cr, Cu, Hg, Mn, Ni and Sb) in polychaete (Chaetopterus variopedatus) samples. After the optimization of the method with certified reference material (CRM 1566b, Oyster tissue), the analytes were determined by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP OES). Repeatability was adequate (< 10 %), results for CRM agreed with the certified values and the residual carbon content (RCC) values were lower than 15 %. Moreover, up to ten samples can be simultaneously decomposed in 34 min., resulting in a high sample throughput. The developed method was applied to polychaete samples collected from Todos os Santos Bay, Bahia, Brazil.

show abstract

“…These systems are safe, versatile; and allow control of microwave energy released to the sample. However, loss of volatile elements cannot be excluded in open-vessel digestion [13].…”

Section: Introductionmentioning

confidence: 99%

A review of reflux systems using cold finger for sample preparation in the determination of volatile elements

Ferreira

Silva

Santana

et al. 2013

Microchemical Journal

View full text Add to dashboard Cite

The present paper presents advantages, limitations and applications of a reflux system (cold finger) employed for sample preparation during determination of volatile elements. Also other techniques employed for sample preparation in the determination of volatile elements are discussed and compared. A list of ten papers published reporting use of cold finger as reflux system are being cited and discussed.

show abstract

Focused-microwave-assisted acid digestion: Evaluation of losses of volatile elements in marine invertebrate samples

Cited by 21 publications

References 20 publications

Development of an analytical method for determination of lead and cadmium in biological materials by GFAAS using Escherichia coli as model substance

Development of an analytical method for determination of lead and cadmium in biological materials by GFAAS using Escherichia coli as model substance

Microwave-assisted acid Digestion Procedure for Trace Elements Determination in PolychaeteChaetopterus variopedatus

A review of reflux systems using cold finger for sample preparation in the determination of volatile elements

Contact Info

Product

Resources

About