Abstract
The present work explores the slurry sampling approach for automatic, flow-based plant analysis. For this purpose, pinch valves were introduced into a multi-syringe flow injection analysis manifold to provide the repeatable aspiration of a few microliters of plant suspension before the material was further processed through the flow system. For validation of the proposed approach, the determination of potassium by flame emission spectrometry was implemented. Several parameters were studied: the concentration of plant particles in the sample suspension and the utilization of matrix modifiers. Microwave digestion was also implemented; no significant difference was found when certified reference material was analyzed with or without the in-line digestion step. The system was successfully applied to 13 samples within a concentration range of 2.5 to 100 mg g−1. A determination frequency of 28 h−1 was achieved and the precision was better than 4.0% (n = 12).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. E. Johnston, “Understanding Potassium and Its Use in Agriculture”, 2003, European Fertilizer Manufacturers Association, Brussels, Belgium, 5–35.
Amarilis de Varennes, “Produtividade dos Solos e Ambiente”, 2003, Escolar Editora, Lisboa, Portugal, 349–352.
M. Miró and W. Frenzel, Microchim. Acta, 2004, 148, 1.
M. A. Segundo and L. M. Magalhães, Anal. Sci., 2006, 22, 3.
V. Cerdà, R. Forteza, and J. M. Estela, Anal. Chim. Acta, 2007, 600, 35.
J. Buanuam, M. Miró, E. H. Hansen, J. Shiowatana, J. M. Estela, and V. Cerdà, Talanta, 2007, 71, 1710.
M. Valcárcel and M. Gallego, Talanta, 1997, 44, 1509.
A. Carlosena, M. Gallego, and M. Valcárcel, J. Anal. At. Spectrom., 1997, 12, 479.
M. de la Guardia, V. Carbonell, A. Morales-Rubio, and A. Salvador, Talanta, 1993, 40, 1609.
P. Viñas, N. Campillo, I. L. García, and M. H. Córdoba, Anal. Chim. Acta, 1993, 283, 393.
C. C. Oliveira, R. P. Sartini, and E. A. G. Zagatto, Anal. Chim. Acta, 2000, 413, 41.
C. C. Oliveira, E. A. G. Zagatto, A. N. Araújo, and J. L. F. C. Lima, Anal. Chim. Acta, 1998, 371, 57.
M. Hulsman, M. Bos, and W. E. van der Linden, Anal. Chim. Acta, 1996, 324, 13.
M. Hulsman, M. Bos, and W. E. van der Linden, Anal. Chim. Acta, 1997, 346, 351.
I. Walinga, W. van Vark, V. J. G. Houba, and J. J. van der Lee, “Plant Analysis Procedures”, 1989, Part 7, Wageningen Agricultural University, Wageningen, Netherlands.
M. I. G. S. Almeida, M. A. Segundo, J. L. F. C. Lima, and A. O. S. S. Rangel, Talanta, 2004, 64, 1283.
J. C. Miller and J. N. Miller, “Statistics and Chemometrics for Analytical Chemistry”, 5th ed., 2005, Pearson Education, Harlow, UK.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Almeida, M.I.G.S., Segundo, M.A., Lima, J.L.F.C. et al. Direct Introduction of Slurry Samples in Multi-syringe Flow Injection Analysis: Determination of Potassium in Plant Samples. ANAL. SCI. 24, 601–606 (2008). https://doi.org/10.2116/analsci.24.601
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.2116/analsci.24.601