Exploitation of pulsed flow and gas diffusion in a polyvalent analytical flow system: sulfide, sulfite and ethanol monitoring during alcoholic fermentation.

• Grant number: 10/00972-4
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: April 01, 2010
• End date: March 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Elias Ayres Guidetti Zagatto
• Grantee: Claudineia Rodrigues da Silva
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated research grant: 11/23498-9 - Advanced flow systems for technological, agronomical and environmental analysis, AP.TEM

Abstract

AbstractA polyvalent analytical flow system will be proposed for sulfide, sulfite and ethanol monitoring in samples relevant to the ethanol production. Solenoid pumps will be used as fluid propeling device, generating pulsed flow characteristic of the multi-pumping flow systems. The methods involve gas diffusion, online detection and spectrophotometric detection. The N,N-dimethyl-p-fenilenidiamino, malachite green and Cr (VI)reagents will be used for in situ determination of sulfide, sulfite and ethanol, respectively.Influence of the implementation of pulsed flows will be evaluated regarding mixing conditions of the involved solutions, heat transfer and gas diffusion. The Schlieren effect will be also evaluated.The analytical systems should be simple and robust in order to be able its use in industrial laboratories. According to the quantities of chemical species produced in the fermentation, one intends to contribute to the selection of Sacharomices cerevisiae strains. To this end, fermentations will be conducted in the laboratory mimicking those from industries.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SILVA, CLAUDINEIA R.; GOMES, TACIANA F.; BARROS, VALDEMIR A. F.; ZAGATTO, ELIAS A. G.. A multi-purpose flow manifold for the spectrophotometric determination of sulphide, sulphite and ethanol involving gas diffusion: Application to wine and molasses analysis. Talanta, v. 113, p. 118-122, SEP 15 2013. (10/00972-4, 11/23498-9)

SILVA, CLAUDINEIA R.; BARROS, VALDEMIR A. F.; BASSO, LUIZ C.; ZAGATTO, ELIAS A. G.. Spectrophotometric flow injection monitoring of sulfide during sugar fermentation. Talanta, v. 85, n. 3, p. 1703-1705, SEP 15 2011. (10/00972-4, 06/07309-3)

VIDA, ANA C. F.; SASAKI, MILTON K.; GOMES, TACIANA F.; SILVA, CLAUDINEIA R.; FERES, MARIO A.; ZAGATTO, E. A. G.. Zone trapping/merging zones in flow analysis: A novel approach for rapid assays involving relatively slow chemical reactions. Talanta, v. 85, n. 1, p. 259-263, JUL 15 2011. (10/00972-4, 06/07309-3)