Development of automated procedures for multi-parametric chemical analysis of samples relevant to intensive animal management

• Grant number: 94/00311-3
• Support Opportunities: Research Projects - Thematic Grants
• Start date: November 01, 1994
• End date: December 31, 1997
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Elias Ayres Guidetti Zagatto
• Grantee: Elias Ayres Guidetti Zagatto
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated research grant(s): 96/05104-1 - Flow analysis with accuracy assessment, AR.EXT

Abstract

The main objective of the project is the development of automated procedures for multi-parametric chemical analysis of samples relevant to intensive animal management. Kinetic aspects will be exploited for determination of the main macro and micronutrients in plants, animal tissues, natural waters, soils and fertilizers, as well as Cr and Co, IO3 and BrO3 em foods and animal supplements. Novel flow-injection systems (FIA) will be designed, developed and applied to the determination of inorganic chemical species relevant to agro-industrial research and further implemented to large scale analysis. The systems will be further improved and simplified, in order to permit the conception of a polyvalent flow analyzer for the routine laboratory. Additionally, more complex systems for simultaneous determinations and/or specific applications aiming reagents economy and including in-line analyte separation/concentration will be developed. Spectrophotometry will be priorized as the detection technique considering that it is usually easily implemented in analytical laboratories devoted to large scale analysis of agronomical samples. Some potentialities of the FIA systems such as multi-site detection, stopped-flow, merging zones, simultaneous determinations, etc will be exploited. Moreover, flow systems comprising microcomputer controlled three-way solenoid valves will be also designed resulting in improved versatility of the manifolds, expansion of the applicability range of the developed procedures, and ease of implementation in laboratories dedicated to large scale analysis. (AU)