A critical evaluation of digestion procedures for coffee samples using diluted nitric acid in closed vessels for inductively coupled plasma optical emission spectrometry.
作者： Jacira T. Castro , Elisângela C. Santos , Wagna P.C. Santos , Letícia M. Costa , Mauro Korn
DOI: 10.1016/J.TALANTA.2009.02.030
关键词:
摘要: The efficiency of diluted nitric acid solutions for digesting regular coffee samples was evaluated employing two closed vessel procedures: one based on microwave-assisted heating and the other conductive using pressurized Parr bomb. digestion by determining residual carbon content (RCC) acidity. effective both procedures, i.e. there were no solid residues after decomposition reactions when up to 3.5 mol L(-1) solutions. It demonstrated that procedures are critically dependent occurring in liquid gas phase formation NO its conversion NO2 O2 exerts a major effect oxidation organic matter. These processes more vessels heated microwave radiation due greater volume these flasks temperature gradient exists during first step process. proposed model solution is corroborated data about consumption measuring pressure whole
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sci-hub.se 参考文章(23)
S. J. Haswell, Howard M. Kingston, Microwave-enhanced chemistry : fundamentals, sample preparation, and applications American Chemical Society. ,(1997)
Niwat Manutsewee, Wanlapa Aeungmaitrepirom, Pakorn Varanusupakul, Apichat Imyim, Determination of Cd, Cu, and Zn in fish and mussel by AAS after ultrasound-assisted acid leaching extraction Food Chemistry. ,vol. 101, pp. 817- 824 ,(2007) , 10.1016/J.FOODCHEM.2005.12.033
J.L. Capelo, C. Maduro, C. Vilhena, Discussion of parameters associated with the ultrasonic solid-liquid extraction for elemental analysis (total content) by electrothermal atomic absorption spectrometry. An overview. Ultrasonics Sonochemistry. ,vol. 12, pp. 225- 232 ,(2005) , 10.1016/J.ULTSONCH.2003.10.010
J. H. Zaidi, I. Fatima, M. Arif, I. H. Qureshi, Determination of trace elements in coffee beans and instant coffee of various origins by INAA Journal of Radioanalytical and Nuclear Chemistry. ,vol. 267, pp. 109- 112 ,(2005) , 10.1007/S10967-006-0015-Y
Kim A. Anderson, Brian W. Smith, Chemical Profiling To Differentiate Geographic Growing Origins of Coffee Journal of Agricultural and Food Chemistry. ,vol. 50, pp. 2068- 2075 ,(2002) , 10.1021/JF011056V
S FOSTER, W MAHER, F KRIKOWA, S APTE, A microwave-assisted sequential extraction of water and dilute acid soluble arsenic species from marine plant and animal tissues Talanta. ,vol. 71, pp. 537- 549 ,(2007) , 10.1016/J.TALANTA.2006.04.027
Chao Yan Zhou, Ming Keong Wong, Lip Lin Koh, Yeow Chin Wee, Microwave-assisted dilute acid extraction of trace metals from biological samples for atomic absorption spectrometric determination Journal of Analytical Atomic Spectrometry. ,vol. 11, pp. 585- 590 ,(1996) , 10.1039/JA9961100585
Pilar Bermejo-Barrera, Antonio Moreda-Piñeiro, Adela Bermejo-Barrera, Sample pre-treatment methods for the trace elements determination in seafood products by atomic absorption spectrometry. Talanta. ,vol. 57, pp. 969- 984 ,(2002) , 10.1016/S0039-9140(02)00139-X
Sandro T Gouveia, Fernando V Silva, Letı́cia M Costa, Ana Rita A Nogueira, Joaquim A Nóbrega, None, Determination of residual carbon by inductively-coupled plasma optical emission spectrometry with axial and radial view configurations Analytica Chimica Acta. ,vol. 445, pp. 269- 275 ,(2001) , 10.1016/S0003-2670(01)01255-7
Francesco Cubadda, Andrea Raggi, Ettore Coni, Element fingerprinting of marine organisms by dynamic reaction cell inductively coupled plasma mass spectrometry Analytical and Bioanalytical Chemistry. ,vol. 384, pp. 887- 896 ,(2006) , 10.1007/S00216-005-0256-6