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Digital titrator

Grant number: 15/08587-6
Support type:Research Grants - Innovative Research in Small Business - PIPE
Duration: December 01, 2015 - August 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal researcher:Karel Negrin Napoles
Grantee:Karel Negrin Napoles
Company:Keme Desenvolvimento e Comércio de Instrumentos Científicos Ltda
City: Campinas
Associated grant(s):16/10540-0 - Digital titrator, AP.PIPE
Associated scholarship(s):16/01857-0 - Digital titrator, BP.PIPE


The project proposes the development of a titrator with digital reading of the volume of titrant using a contact image sensor (CIS). Therefore, a working prototype should be built with appropriate software and hardware. Bench and application tests will determine the technical feasibility and will guide further development. The expectation lies in the functionality of a product of innovative design at the international level, of simple construction, without mechanical high-precision systems, expensive and hard to maintain. The cost is relevant in the acquisition and maintenance, and the simplicity of the proposal comes against the market demand. A prior patent search has not revealed conflicting records. Titration is a quantitative analytical technique of a species in solution by the addition of a reactive chemical species (titrant) of known concentration, reaction of a known and reproducible stoichiometry. It is of widespread use in the analysis of acids, bases, oxidizers, reducing agents, metal ions, proteins and other species in chemical and clinical laboratory, industrial, and academic services. Titrators perform these analyzes with different degrees of automation and market trends point to flexibility, versatility, performance and economy as desirable characteristics. The machine releases solution (titrant) to the reaction vessel containing the solution analyzed (titrated) and a visual indicator of the end of the reaction or sensor. Its main advantages are precision, accuracy and versatility, and the disadvantages of current instruments are the cost and mechanical complexity (both the main manufacturer are from Swiss). The electronic hardware will be developed with digital technology and 32-bit microcontroller, which will allow the operating variables, can be defined and controlled by the user, accurately, and retrieved when needed, from the embedded software subroutines. The circuits are prototyped in order to produce a device with reduced dimensions, with SMD components. The firmware will run automatically pre-programmed procedures and protect the equipment from unauthorized changes, as required by laboratory and quality management systems, to safeguard the consistency of electrical signals and information. The software will be responsible for receiving the detector signal and for processing the data, displaying information, controls and instrument settings. The software will consist of a part dedicated to communication and control, and another, a graphical interface for display of analytical data in real time interaction with the user, configuration of operating parameters, monitoring of sensors, acquisition, processing and display of real-time data. The project will be developed in SolidWorks, Protel and LabView. Operating components are purchased from recognized role of national suppliers and mounting assembly and operational tests will be done internally. Hardware, software and test program were defined by the team and will be developed with the support of consultants. (AU)

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