Digital titrator

• Grant number: 16/10540-0
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• Start date: November 01, 2016
• End date: October 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: KAREL NEGRIN NAPOLES
• Grantee: KAREL NEGRIN NAPOLES
• Company: Keme Desenvolvimento e Comércio de Instrumentos Científicos Ltda
• City: Campinas
• Associated research grant: 15/08587-6 - Digital titrator, AP.PIPE
• Associated scholarship(s): 16/22766-3 - Digital titrator, BP.PIPE

Abstract

The project proposes the development of a titrator with digital reading of the volume of titrant, by image sensor (CIS). Prototypes were built, whose technical feasibility has been proven in tests such as the functionality and adequacy of the concept. 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, chemical and clinical laboratories, industry, and academic services. Titration perform these analyzes with different degrees of automation and market trends point to flexibility, versatility, performance and economy as desirable characteristics. The device releases solution (titrant) to the reaction vessel containing the solution to be analyzed (titrated) and a visual indicator of the end of reaction, or sensor. Its main vantages are precision, accuracy and versatility, and the disadvantages of the current instruments are the cost and mechanical complexity. Electronic hardware is based on digital technology and 32-bit microcontroller and circuits were designed to PCI with SMD components. The firmware automatically performs pre-programmed procedures and protects the equipment against unauthorized changes, as required by the laboratory and quality management systems, to safeguard the consistency of electrical signals and information. The software receives the signal of the end point sensor is reading the data and information displays, controls and instrument settings. It has a focused part of the communication and control, and a graphical interface to display results in real time interaction with the user, configuration of operating parameters, monitoring of sensors, acquisition, processing and display of data. (AU)