Microwave-assisted sample preparation in sequential injection: spectrophotometric determination of magnesium, calcium and iron in food

Microwave-assisted sample preparation in sequential injection: spectrophotometric determination of magnesium, calcium and iron in food (2000)

Authors:
Autor USP: ZAGATTO, ELIAS AYRES GUIDETTI - CENA
Unidade: CENA
DOI: 10.1016/s0003-2670(00)00799-6
Subjects: QUÍMICA ANALÍTICA; QUÍMICA ANALÍTICA INSTRUMENTAL
Language: Inglês
Abstract: A sequential injection system for spectrophotometric analysis of foods and similar involving direct sample introduction as a natural suspension or as slurry is proposed. Sample and concentrated nitric acid are sequentially aspirated and directed towards a digestion bomb located inside a microwave oven where sample decomposition takes place. After digestion, aliquots of the processed sample and randomly selected reagents are sequentially aspirated towards the holding coil and pumped towards the detector. As application, magnesium, calcium and iron were determined in milk, soft drinks and similar by using o-cresolphthalein (with or without EGTA addition) and o-phenanthroline as colour forming reagents. The system is versatile, and yields reproducible results (r.s.d.<0.04 for 5.0-50.0 mgl-1 Mg, 15.0-150 mgl-1 Ca and 2.0-20.0 mgl-1 Fe) in agreement with flame atomic absorption spectrometry involving the manual sample digestion procedure
Imprenta:
- Publisher place: Piracicaba
- Date published: 2000
Source:
- Título do periódico: Analytica Chimica Acta
- Volume/Número/Paginação/Ano: v. 413, p. 41-48, 2000

Informações sobre o DOI: 10.1016/s0003-2670(00)00799-6 (Fonte: oaDOI API)

A citação é gerada automaticamente e pode não estar totalmente de acordo com as normas

ABNT

OLIVEIRA, C C e SARTINI, R P e ZAGATTO, Elias Ayres Guidetti. Microwave-assisted sample preparation in sequential injection: spectrophotometric determination of magnesium, calcium and iron in food. Analytica Chimica Acta, v. 413, p. 41-48, 2000Tradução . . Disponível em: https://doi.org/10.1016/s0003-2670(00)00799-6. Acesso em: 18 abr. 2024.
APA

Oliveira, C. C., Sartini, R. P., & Zagatto, E. A. G. (2000). Microwave-assisted sample preparation in sequential injection: spectrophotometric determination of magnesium, calcium and iron in food. Analytica Chimica Acta, 413, 41-48. doi:10.1016/s0003-2670(00)00799-6
NLM

Oliveira CC, Sartini RP, Zagatto EAG. Microwave-assisted sample preparation in sequential injection: spectrophotometric determination of magnesium, calcium and iron in food [Internet]. Analytica Chimica Acta. 2000 ; 413 41-48.[citado 2024 abr. 18 ] Available from: https://doi.org/10.1016/s0003-2670(00)00799-6
Vancouver

Oliveira CC, Sartini RP, Zagatto EAG. Microwave-assisted sample preparation in sequential injection: spectrophotometric determination of magnesium, calcium and iron in food [Internet]. Analytica Chimica Acta. 2000 ; 413 41-48.[citado 2024 abr. 18 ] Available from: https://doi.org/10.1016/s0003-2670(00)00799-6